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>> THE REPLICANT << Experimental 'Steamy & Gasoliney' Sound-System
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 Posted: Sat Oct 1st, 2016 09:03 am
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Si.
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:cool:

It was a snowy '70s Christmas many years ago
when I lashed together my first piece of 'serious' electronics.
A stereo-amplifier kit from RT-VC on Londons grimy Edgware Road.

Clustered around the A40 Marylebone fly-over
were a number of rundown shabby stores, selling electronic parts & gizmos.
The legendary Henrys Radio & RT-VC were my favorites.

Model railroaders, radio HAMs & rastas all in search of 'cool parts'.
Mullard boards, military hardware, turntables, tools, you name it !
Affordable as well.

Since then I've had the DIY-audio bug & have built a ton of stuff.
Mostly a tad on the large and LOUD side !!
But some teeny-weeny things as well.

These days Edgware Road is all mirror-glass, air-con & Rolls Royces
nothing like the steamy & gasoliney Blade Runner scene it once was.
The Web is where all the really cool & affordable electronics are now.



Anyhow, cutting to the chase...
...I thought I'd try and lash together some kind of miniature experimental sound-system.
Ambient sounds, loading sounds, gas-mech. rumbleings, that kinda thing.

The idea is to use small, simple & affordable parts, to create a 'leftfield' layout soundscape.
Nothing complicated & certainly NO rocket-science !
Something that anyone could make for a few bucks, with no experience, is the aim here.

There are a huge number of cool products, easy to wire boards & parts out there to be had.
It's just a case of tracking down the best & most suitable of them for the job.
So that's what I'm doing now.

More soon ...

:!:

Si.
.



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 Posted: Sat Oct 1st, 2016 10:26 am
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Si.
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>> THE REPLICANT << Corporations first $2 component is on it's way to corporate H.Q as we speak.

Made in the Hing Hong Pong consumer electronics factory, it is a marvel of modern miniaturization.
We're hoping that it's a marvel of modern sound quality as well.



$2 ? ... can't be much cop, I heard at the back there !
Well, sans the gargantuan Madison Avenue advertising budget, the huge glossy box, the 1000% mark-up etc. etc. etc.
That's what they cost.
Including delivery BTW.

:!:

Si.
.



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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
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 Posted: Sun Oct 2nd, 2016 01:40 am
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Salada
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Time was I could walk along Edgeware Rd, find what I wanted at bargain price & UNDERSTAND HOW IT WORKED.

After an absence of many years I returned, no electronic stores - all changed. Not even a Sum Ting Wong Corp outlet.

Regards, Michael

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 Posted: Wed Oct 5th, 2016 06:51 pm
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Herb Kephart
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Keep going on this Si.

Sounds like an interesting project, but needs a remote (couple wires coming out into the sunlight,) so it can be hidden under the layout at a terminal, switching area, etc. etc.


Herb, who in general hates "noise''



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 Posted: Wed Oct 5th, 2016 09:27 pm
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Lee B
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Salada wrote:
Time was I could walk along Edgeware Rd, find what I wanted at bargain price & UNDERSTAND HOW IT WORKED.

After an absence of many years I returned, no electronic stores - all changed. Not even a Sum Ting Wong Corp outlet.

I agree. I now believe that it's not that I'm too old to get this stuff, it's that it requires WAY more hand-on work to make out-of-the-box things function these days. That's a simple fact. Time was, you needed to read the manual maybe and get some batteries, but that was it. Now, you need to program stuff, connect them to things they really don't need to be connected to (for example, a pal of mine with no internet bought a TV and he CAN'T use it because it won't allow him to simply hook it to an antenna lead; is HAS to be internet connected to function. And he can't return it because there's technically nothing wrong with it).



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 Posted: Sat Oct 8th, 2016 08:05 pm
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bobquincy
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This one

http://webstore.vlsi.fi/epages/vlsi.sf/en_GB/?ObjectPath=/Shops/2015020901/Products/%22VSMD001%2C%20Audio%20processor%2C%20Country%20of%20Origin%3A%20FI%2C%20Taric%3A%2085198919%22

is 20 Euro in small quantities but drops to 5.50 Euro for 100 pieces. The main selling point is that it is easy to connect.



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 Posted: Sun Oct 9th, 2016 05:03 am
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W C Greene
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Holy cow! I looked at the device and read the description and I ain't got a clue as to what all this means! Is this a sound machine? Is it "live or Memorex?" As Herb wrote-"it can be hidden under the layout"...maybe hidden somewhere else? I have a kitten who will hide it well. Maybe I will just go off and hide myself!

Woodrow



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 Posted: Mon Oct 10th, 2016 08:12 pm
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Herb Kephart
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Woodie--

They put it all in code so that some people can be smug about being able to understand it

I have enough problem with Engolloush.

Looks like it's time to oil the spull check again. Guess I should use a thinner oil for the comming winter. Where did I leave my stone club----


Hreb



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 Posted: Tue Oct 11th, 2016 03:32 am
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Si.
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Hi Guys

Thanks for your interest in the project !
What project ?
Erm ... well ... it's 'under development'
EXPERIMENTAL !
It will happen...
... s l o w l y . . .


- - - - - - -


" Time was I could walk along Edgeware Rd, find what I wanted at bargain price & UNDERSTAND HOW IT WORKED "

Hi Michael

The store selling the cheap 10LB sledge-hammers is demolished & the new place sells Faberge-eggs, behind bullet-proof glass !
Times have changed.

:moose:


- - - - - - -


" Keep going on this Si.
Sounds like an interesting project
Herb, who in general hates 'noise' "

Hi Herb

I'll try my best !
It could be an interesting project I think.
Herb, I hate 'noise' as well.
>> THE REPLICANT << aims to be 'harmonious' & 'unobtrusive'.
Think ' a t m o s p h e r e ' rather than 'SPECIAL EFFECTS' !!

:moose:


- - - - - - -


" It requires WAY more hand-on work to make out-of-the-box things function these days. That's a simple fact.
Now, you need to program stuff, connect them to things they really don't need to be connected to "

Hi Lee

I couldn't agree more.
Things should be accessible, self contained & as easy to set up as possible.
>> THE REPLICANT << will try never to stray from these principles.

:moose:


- - - - - - -


" The main selling point is that it is easy to connect."

Hi Bob

Thanks for your link to the sound product.
I have looked at it & saved it for reference.

>> THE REPLICANT << is going to attempt to extract the maximum from cheap & simple components.
The board looks incredibly difficult to connect & costs 10x more than an MP3 player.
It also looks difficult to operate, as there are no controls, screen or regular sockets fitted to it.
I suspect, that without considerable care & experience, the $20 board would easily be TOAST !
The advanced electronics on this board, have already been 'encapsulated' as a cheap & accessible product; in the MP3 player.
The KISS principle is No.1 at >> THE REPLICANT << Corporation.

:moose:


- - - - - - -


" Holy cow! I looked at the device and read the description and I ain't got a clue as to what all this means! "

Howdy Woodie

Don't worry, the MP3 player is about 1000x easier to understand !

If you can fit Radio-Control to a loco...
...with all that WIRING ! batteries, chargers, transmitters, receivers, antennas, motors etc. etc.
>> THE REPLICANT << will hopefully be a 'walk in the park' compared to all that 'wireless' R.C. spaghetti !!

:moose:


- - - - - - -


" They put it all in code so that some people can be smug about being able to understand it "

Hi again Herbie

>> THE REPLICANT << won't 'speak in tongues'
No secret codes & language.
Just plain, simple, cheap, good ol' fashioned, workshop tinkering !
We like THAT !

:moose:


- - - - - - -


More soon . . .

Si.



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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
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 Posted: Tue Oct 11th, 2016 06:42 pm
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bobquincy
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Herb Kephart wrote: Woodie--

They put it all in code so that some people can be smug about being able to understand it

I have enough problem with Engolloush.

Looks like it's time to oil the spull check again. Guess I should use a thinner oil for the comming winter. Where did I leave my stone club----


Hreb

It's not so much being smug about understanding it, rather that I have been reading electronic specs for 50 years and do sometimes forget that it is not a native language.

As an engineer I have enough problems with English too!  ;)

boB



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 Posted: Wed Oct 12th, 2016 08:07 pm
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Herb Kephart
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Bob--
''Being smug about it" could be easily taken as an insult--and while I could have phrased it better, it wasn't meant to be one.

And I realize that to someone like your self it makes perfect sense, it is very frustrating to someone who is trying to decipher what is meant.

Impossible often. Just about the time that I learned (if I haven't forgotten) the symbol for a PNP transistor--there are nine new things that get thrown in the mix.

So I just hack away at my card and posterboard with an Exacto knife. even then, I learn new words right along---when the part starts to turn red.

Hemoglobin Herb



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 Posted: Wed Oct 12th, 2016 10:50 pm
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Hi Si - as it's on the same subject, I've recently hooked up an ambient sound system to my On30 Updah Creek layout using one of these £2.00 MP3 players and some redundant computer speakers (the sort with a built in amp) which were stripped of their cases and the internals set into the underside of the foam baseboard.

001 by slateworks, on Flickr

Connection is a piece of cake with a supplied three wire ribbon cable for connection to the speaker's "in" socket and a supplied power wire connected to a 9V DC regulated supply. Recordings have been made as WAV. files onto SD cards and are from various free "atmosphere" sound file construction sites and as I wanted a Country Music Festival also, filched from suitable tracks found on YouTube.

The whole thing, volume, track selection and a choice of five pre-set tones from the player's built-in graphic equaliser is controlled from the supplied remote. In fact, I've installed two players (at that price you can't go wrong!), the second one playing through a £1.80 amp connected to two ordinary 40mm round speakers. The speakers do need a pre-amp of some sort as you can't just connect the player direct.

d (4) by slateworks, on Flickr

Great fun for a home layout and I made a very amateurish video to demonstrate a bit of the sounds. The music's a full track so you may want to close it before the end!

http://youtu.be/K9iWtg5aYqQ

Last edited on Wed Oct 12th, 2016 10:53 pm by slateworks



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 Posted: Wed Oct 12th, 2016 11:02 pm
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Si.
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Hi Doug

BRAVO !!

This is exactly the kinda thing I'm getting at.

I should really Post my full ideas on the whole caboodle...
...I will soon.
It involves a kinda 'crossover' splitting Bass from Treble.
But NOT at the 'typical' 3000 Hz of a Hi-Fi speaker.
More like around 100 Hz or so.

Doug, that $2 MP3 player looks AWESOME !!
I like the fact that it has a proper external PSU connection.
The one I ordered doesn't, it has an internal LiPo battery.
I would much prefer a decent PSU, sans the battery.

I have not seen this type of packaging in my searches.

Thanks Doug !
This is why starting crazy threads is worth doing !!

:moose:

Si.

Just found the general type
With the search term 'MP3 module remote' or 'panel mount' etc.



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 Posted: Thu Oct 13th, 2016 12:51 am
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slateworks
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Hi Si. Yes, this is the one I bought a couple of but I made a mistake with the price - it was £3.00 not £2.00!

http://www.ebay.co.uk/itm/162114882488?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Hate to think what that would be in dollar terms today with the pound shrinking like it is but still pretty cheap.

The ones you found have the addition of Bluetooth which mine doesn't and possibly an on-board amp so may be connectable direct to speakers. I did try to get more info from a couple of sellers but they weren't at all forthcoming so I may just buy one to find out for myself.




Last edited on Thu Oct 13th, 2016 12:55 am by slateworks



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 Posted: Thu Oct 13th, 2016 01:43 am
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Si.
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" I made a mistake with the price - it was £3.00 not £2.00! "

Hi Doug

YOU TRYIN' TO BANKRUPT MY RAILROAD ?? !!

I swear I only had £0.50p a week pocket-money, back in the '70s !!
Don't worry, I can deal with the 50% inflation.
I'll save-up an extra week or two !!

Thanks again Doug !
I have now seen the 3W-amp versions, Bluetooth & screen-less versions ... PHEW !!
All good stuff !
Panel-mounting, with external-power, is def. the way forward !!

I'm gonna reconsider my specs. for the project...
...& order one of the panel-mount MP3 players to experiment with.

3W-amp looks interesting.
Remote-control less so, as would control ALL players unselectively...
...could blank off IR receiver though.
Mmm...

Good news !!



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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
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 Posted: Thu Oct 13th, 2016 03:13 am
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slateworks
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Hi Si - I simply mounted mine into Updah's hardboard (masonite?) fascia with the rest of the gubbins behind.

e (1) by slateworks, on Flickr

e (3) by slateworks, on Flickr

Pretty straightforward and easy to get at. The right hand player has two pairs of speakers available, one pair under the town main street where the stage is and the other pair under the town's sawmill. The central switch is a four pole, double throw, centre off switch which allows me to route the sound to either pair according to whether I'm playing sawmill or concert or just crowd sounds with choices of tracks available on the same SD card.


Last edited on Thu Oct 13th, 2016 03:17 am by slateworks



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 Posted: Sat Oct 15th, 2016 12:53 am
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Si.
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Hi Doug :wave:

I checked out all the panel-mounted MP3-players I could find.
If you have a specific question on one you've looked at, I could probably answer it.

Broadly speaking, they either come WITH or WITHOUT built-in amplifiers.

Yours, which are kinda 'the car version', as you know, don't have built-in amplifiers.

The versions advertised as having 3W+3W amplifiers, all seem to be based around a pair of 8002B digital-amplifier chips.
They output 3 Watts @ <10% distortion, probably around 1 Watt @ <0.1% distortion.
Not too bad, all things considered.

If the built-in amplifier is not required, a 'normal' line-level output can be taken from Pin-4 of the chip (I think).
The 3 Watt 'digital-output' of these models, CAN NOT be fed into a regular sound-mixer, SMOKE will result.
This is due to the fact that the digital-amplifier output has no 'real earth' connection.
Taking a wire from Pin-4, for feeding into any regular line-level audio-gear, should work fine though.

I looked at all the options & took a punt at this one below.
Including remote-control & wiring-looms, inc. P&P, it cost me £2.02p !!
Further units, sans remote-control, could probably be haggled-down to maybe £1.50p each ??
I am thinking that >> THE REPLICANT << might well use 8 or more of these units.



What I liked about this one is :-

It has the 3W+3W built-in amplifier.
It has a very-small front-panel area, perfect for a cluster of 8 or more, in an A.B.S box.
All 'hidden' functions, without buttons, are accessible using the remote-control, ie. E.Q. settings, Repeat-mode, Track forward/backward, Volume up/down etc.
Since it doesn't have a built-in F.M-Radio, the screen for this, is not needed.
Access to the 1/2 dozen Tracks one might have on the SD-Card, is simply done 'screenless' using the remote-control.

:!:

More . . . s o o n . . .

Si.



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 Posted: Sat Oct 15th, 2016 12:59 am
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 Posted: Sat Oct 15th, 2016 01:01 am
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 Posted: Sat Oct 15th, 2016 01:03 am
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 Posted: Sat Oct 15th, 2016 02:04 am
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slateworks
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Great stuff Si. You're clearly far more techno than I so I'll be watching with interest as to how you get on with your set-up.
I suspect that the 3W + 3W versions can be connected directly to a non amplified speaker which of course takes one line of wiring out of the equation.
That being the case, I'll probably play around with one of these

http://www.ebay.co.uk/itm/Black-SD-MP3-Player-CT02EA-Remote-Control-2x3W-Bluetooth-Talking-module-/252267227343?hash=item3abc4c68cf:g:t9wAAOSwCypWpzPL

 to see how well it performs.



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 Posted: Sat Oct 15th, 2016 02:31 am
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Si.
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Hi Doug :wave:

Yes, the one you're looking at, has the pair of 8002B digital-amplifier chips (bottom-right).

The additional Bluetooth-board, is appropriately, the 'blue thing' top-left.
I think this means it will RECEIVE Bluetooth, from eg. a cellphone.
I don't think it actually TRANSMITS Bluetooth though, to eg. a remote amp/speaker unit.
Mmm... ??



The Bluetooth feature seems to have limited usefulness, if this is the case, for a model sound-system.

Looks like a lot of extra dough getting paid out, for an F.M.-radio, a Clock & Bluetooth, all of which appear to be of limited use.
You don't need the remote either, I guess you have 2 already.

:moose:

Si.

You might be able to broadcast C&W music to the town square, from your cellphone though !
Or
Play your phone calls back through the speaker in the sawmill !!

;)

The machinery noise might make the caller hard to hear though !

:f:



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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

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 Posted: Sat Oct 15th, 2016 03:37 am
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slateworks
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As I thought Si but thanks for the confirmation. Yes, I agree the "extras" are unnecessary and an even cheaper unit would make more sense. And yes, I've got remotes coming out of my ears! It seems that every bit of cheap electronics from the Far East has one and they all appear to be the same.



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 Posted: Sat Oct 15th, 2016 03:58 am
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Si.
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Hi Doug :wave:

I found an eBay seller with a 'best offer' listing, for 5 of the 3-Watt amped, non-Bluetooth units.

I figure if I tell the guy to keep the remotes, and just send the units & looms...
...it could be a great deal.



His 'buy it now' price was about a tenner.

Sans remotes, maybe he'd do 5 for £7.50p ?

Possibly less even.

L:

Si.



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 Posted: Sat Oct 15th, 2016 09:31 am
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Hi >> REPLICANT << readers :wave:

I just bought a CD of steam railway recordings, made by one of the old-school of British Cinema sound-recordists, Peter Handford.
Some of the reviews on Amazon were pretty funny.
So here are the details & the reviews.

:bg:

Peter Handford (1919 - 2007) was one of the British Film Industries' most respected sound recordists and mixers.
When out and about on location directors came to trust this artisan of sound to sonically and realistically complement the imaginative and often affecting visuals.
With his own personal passion you could argue that it was this same level of realism and authentic reproduction that would make his recordings of railways so special and evocative for those who came to hear them.
The average rail enthusiast could easily list the reasons why, far better than we could ever express here.
The qualities and the technical aspects that make them treasure the sounds of those last wistful days of steam.
Maybe it is because here you have something that wholeheartedly transports you back instantly to that moment in time and brings home the excitement of experiencing steam in its full glory and the array of emotions that follow.
Your senses are pleasingly overwhelmed by the noise, commotion, routines and trials and tribulations of the everyday workings of the railway.
Placing you in the heart of the action, and there you are standing, track side, in Handford's shoes, feeling the grit on your face and breathing in the smoke and steam.
Meanwhile in the background, the ever changeable British weather and landscape.

:)



Track Listing :-

1. A down express passenger train, followed by an up express passenger train, passing in open country
2. A local passenger train starting out from a country station
3. An express passenger train passing, fast, in open country
4. An express passenger train accelerating after a signal arm changes
5. A local passenger train passing by in open country
6. An express passenger train climbing a steep gradient
7. Passenger trains near the summit of a climb from both directions
8. Passenger trains at the entrance to a tunnel
9. At a country station. Passenger and freight trains passing and a local passenger train arriving and departing
10. An express passenger train accelerating after leaving a station
11. A freight train slowly approaching a marshalling yard
12. A variety of locomotives at work in a large, busy marshalling yard, with loose coupled wagons
13. A loose coupled freight train starting
14. A journey on board an express passenger train
15. At a large main line station; a typically busy terminus
16. Locomotives moving to and from the loco. sheds
17. A journey on the footplate of a locomotive hauling a passenger train
18. Inside a large signal box at a busy main line station
19. Inside the signal box at a country station
20. Passenger and freight trains passing and leaving a station on a main line
21. Passenger trains arriving at, leaving and passing a large station; an important junction, on a main line

73-mins

:cool:

Amazon UK Reviews :-

" I cannot reccommend this product highly enough!
I listen to it on an almost daily basis (usually whilst doing the washing-up) and find it very relaxing to have playing in the background.
If you are tired of listening to the usual drivel on the radio then this is for you.
The CD features 21 tracks (no pun), about half of which are of various steam hauled trains passing.
The real joy however, lies with the other half of the tracks which feature rather more operational interest such as shunting, riding on the footplate and the inside of signal boxes.
Top notch ! "

" Bought for background to a murder mystery dinner party set on a Trans-Siberian Railway, this worked really well.
I'm afraid I can't review how good the particular tracks of steam engines are though ! "

" This CD is really good and has some evocative tracks and sounds.
We had it playing when a man came to sell us new windows,
he said "Of course you won't hear the railway so much with these windows"
and we said, yes we will ! "

" This CD was bought as a Christmas gift for my husband who has set up a train room since retirement.
He was rapt with the sound effects and really enjoys playing and following the tracks as he runs his trains.
Says it has been one of his best gifts ever !! "

" I purchased this CD to play down my shed when I am working on stuff for my garden tramway.
With my big CD player I purchased from Argos I get wonderfull sound and it fill's my shed !!
Really a good buy unlike the CD with the American Locomotive on the cover which is hopeless ! "

;)

Si.
.



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 Posted: Wed Oct 26th, 2016 07:28 am
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Si.
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The sound effects CD is FANTASTIC !! :thumb:

2 more sound effects CDs have arrived now as well. :)

I'll Post some more about all 3 shortly. :cool:

- - - - - - -

I mentioned a while back, that >> THE REPLICANT << would be using a 'LOW PASS FILTER' as part of it's operation.

I had a chance to search out a suitable candidate for this the other day.

It's very simple to connect up & operate.
A soldering-iron or board-plugs are not even needed, as it has nice chunky screw-terminals.
It cost me £2.97p inc P&P and will arrive here soon.

If you use the search-term 'LOW PASS FILTER BOARD' on eBay, you will find it very easily.

More on how it will be used, to follow.

Here it is.



:!:

Si.



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 Posted: Wed Oct 26th, 2016 07:24 pm
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slateworks
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Hi Si. Bookmarked in case it's something I can use when I see what you do with it.



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.


:moose:

Si.



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OK Si, now what?

One thing I found using one combination of MP3 player and small amp


d (1) by slateworks, on Flickr

was that the dimmer switch for the room lighting caused some minor speaker distortion. The lower the lighting, i.e. the harder the dimmer was working, the more buzz I got from the speakers. I must admit to using unscreened ordinary layout wire for the speaker connection and maybe screened wire would ease the problem but at the moment the distortion is not noticeable enough to justify a re-wire.

Interestingly, the other set up which uses the same MP3 player and ex-computer speakers which have their own built-in amp doesn't suffer at all. I'll be interested to hear what you discover.



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Stay away from the new ballasts for a std, 40 W (now34) two tube fluorescent fixture.

One of these turned radio reception in my layout room (encased in aluminum) into nothing but a loud buzz, inspite of an outside antenna.

A pox on progress!

Herb



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 Posted: Wed Nov 2nd, 2016 09:52 pm
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Hi Doug.

Yeah, dimmers are noisy %£@$&*% !

My solution is simple...
...I won't have 'em in the house !!

I have been known to remove neons from things as well !!
Mmm...

It might be that one of the amps is 'digital' & the other 'analog'.
I'm such a vintage ol' dude, that I don't know much about these newish digital-amps.
But they are small, cheap & efficient, so seem to get thrown in a ton of stuff these days.
As I am now finding out.

You could just try 'screening' the cable between the MP3 player & amp-board.
Sometimes some Bacofoil(TM) wrapped around has a simple effect on things.
Just connect a bare 'drain wire' up inside the foil, from your audio-ground screw-terminal.
Cover in tape or heatshrink.

BINGO !

:moose:

Si.



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 Posted: Wed Nov 2nd, 2016 10:12 pm
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Interesting Herb. And the possibility of radio interference (if that's what it is) had never occurred to me before this episode. I'm relieved it's so minor in my case.



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Hi Si. Thanks for the heads up. If it becomes an irritation I'll have a go at that. I reckon I'm even more vintage than you as I didn't realise that amps could be digital or analogue. To me they're just amps!



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My amps make things smoke when too many cluster up in one place.

Herb



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I know the feeling Herb...
...had a slight 'meltdown' here, the other day ! :shocked:

:moose:

Some interesting sound-files HERE :-

http://sdrm.info/sounds/

Including a Shay, Diesel, Steam, Conductor, Horns, Whistles etc.

& 20-mins of a real life, totally OUT OF CONTROL RUNAWAY TRAIN !

CALL DENZIL !!

:cool:



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One thing about my 'economy' hi-tech parts is ...
... they aint arriving by rocket-ship !
Oh well, patience is a virtue & China-Post is CHEAP !!

A slow trickle of boards, bits & bobs is getting here though !

Doug ...
... you might be interested in this newly ordered item.

It allows the digital-amp output of the panel-mounted 'micro' MP3-player & also your 'bluetooth' one with 3W+3W amps built in ...
... to be connected to 'normal' analog line-level audio gear.
eg. the 'low pass filter' board, mentioned earlier.



Basically this unit is 2 transformers & a few other components, in a box, 1 transformer each for Left & Right stereo.

This cost me £1.19p inc. P&P on eBay & is on it's way here as we speak.

:!:

Si.

.



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All extra info thanks Si and I'm eagerly awaiting news of what you do with it all - and the result of course!



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Hi Doug :wave:

I am of course, going to Post more on 'the plan' soon.

The plan is changing a bit though, as the various boards & parts are found.
This is really the R&D stage.

I thought I would start with this, before getting underway 'proper' like.
Otherwise it would all be one huge 'splurge' of info in Post No.1 !
OUCH !

It is great actually, that various Members have already expressed interest in >> THE REPLICANT <<

I have exchanged a TON of eMail recently, with Juergen (Toeffelholm), regarding his own 7/8ths loco & layout sound project.
One thing that has come up from this, is more of an investigation into 'Bluetooth' sound transmission.

I was wondering Doug, if you had got that Blutooth equipped MP3-player yet ?
I thought that it only RECEIVED Bluetooth.
But do you know if it TRANSMITS Bluetooth as well ?

It wasn't totally clear to me, reading the text from Hing Yong Pong Electronics precisely WHAT it did !
It did say it was very good value & would enhance my lifestyle though.
Do you feel your lifestyle has been enhanced by the Hing Yong Pong product ??

:moose:

Si.



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 Posted: Thu Nov 17th, 2016 10:05 pm
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Sorry Si, I've not got round to it yet as I've been distracted building a Cripple Creek/Minera Mexicana type small Mallet on a Roco chassis.

As and when I do dive back into ambient sound I'll report on developments. Good luck with yours and do keep posting on it.

Juergen might want to add his five penneth on here as it's all good education.



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A very cheap & compact Blutooth receiver-board, is one thing I spoke with Juergen about.

He sent me this photo of the small Bluetooth reciever board, in testing.
The receiver also has a built in 3-Watt x 3-Watt stereo amplifier.

The green hood from his 7/8ths critter, is at the bottom of the photo.



One of these little babys, may well arrive at >> THE REPLICANT << H.Q. soon . . .

The board, that is !
Not the cool 7/8ths critter ! (I wish :) )

:!:

Si.




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' Mysterious Moose Mountain ' - 1:35n2 - pt.II
http://www.freerails.com/view_topic.php?id=7318&forum_id=17&page=1

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 Posted: Wed Nov 30th, 2016 01:17 pm
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Hi,
Yes This little Bluetooth board works quite good. I tested it with some music, using my smartphone as transmitter.

Sound is clear and good. Also in direct near to the working DelTang Rx there was no interfering interaction in my test.

What I perceive as disturbing is that this thing talks to me and says things like "ready to connect" and "connected", each time it is switched on.

The loco hood is no actual 7/8" loco. It's from an old G-scale loco with a built in speaker, only used for testing .

Juergen

Last edited on Wed Nov 30th, 2016 01:22 pm by Toeffelholm



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@Si
re: Wesley McDonald, the engineer who survived that crash, found himself in dire straights afterwards and that is very interesting to read: http://cwrr.com/Lounge/Feature/runaway/index.html



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An example of how life isn't always that fair Helmut. Recommended for bravery with one hand and seemingly recommended for the sack with the other! All part of the blame game and compensation culture era I suppose.


Doug



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 Posted: Thu Dec 8th, 2016 01:25 am
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Juergen sent me a photo of his new experimental sound rig. It transmits sound by Bluetooth. We have exchanged quite a few eMails on the subject. Juergen has also now tested the 'impedance convertor', which I also recieved today. Juergen & I have also both now ordered a 'reverberation' board. This will add 'ambience' to overly 'dry' sounds.

Attachment: ChipBlockDiagram.gif (Downloaded 93 times)



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 Posted: Thu Dec 8th, 2016 03:19 am
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I thought getting my head round "layers" in my photo management software was a brain basher but this takes the biscuit! Looks like the route to the canteen at a cheapskate holiday camp - round in circles so you never find it but see lots of distractions on the way!



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 Posted: Thu Dec 8th, 2016 05:32 am
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Hi,
here's my temporary Toeffelholm Soundbox




The converter is directly connected to the speaker outputs of the sound module to transfer the amplified speaker signal into a line in signal for the low pass filter and a bluetooth audio transmitter. The sound module is fed by a separate DelTang Rx65, that works in parallel to a Rx in the loco.  
 Si and his profound knowledge of audio electronics helped a lot with this.


Maybe I find time at the weekend for some sound impressions.

Juergen

Last edited on Thu Dec 8th, 2016 05:45 am by Toeffelholm



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Here's the sound-test situation on the loco side with the bluetooth receiver Si introduced before.  

Of course Dr. Sartorius and his assistant provided their help for performing the test. :brill::moose:




Juergen




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" These damn Victorian cellphones are a tad large ! " exclaims Dr. Sartorius.

:moose: ;)

Si.

:bg:



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I see the DOUBLE SIZE Theodore has arrived as well ! :shocked:

:moose:

Si.

Is the dude with the speaker a Tamiya 1:12 motor-racing guy Juergen ?



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 Posted: Sun Dec 11th, 2016 11:55 pm
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Yes he is from Tamiya. It's a loan from a friend for some pics. Difficult to get nowadays.
I will introduce my figures in my 7/8" figure thread later on. But recently I concentrate on the Toeffelholm Sound installation. 
Juergen

Last edited on Sun Dec 11th, 2016 11:55 pm by Toeffelholm



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Hi Juergen.

Thought I recognized Dr.Sartorius's assistant ! 
I seem to have a 'clone' of him here !!

Juergen sent me a photo of the ex Formula 1 mechanic, now residing on the island of Toeffelholm, doing some more experimental-sound work, for the mysterious Dr.Sartorius !

Nice work Juergen. 
Lookin' good.

:moose:

Si.



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This is getting way too technical for a simple 'ole country boy like me.

Here's my sub-baseboard sound system; all I need to do is wire in the Tsunami somewhere :




For the deeper wheel rumble sounds I might fire up the Hartke 3500 hybrid compressor amp but the 2 x 4 x 10"s + horns will have to go downstairs in the lounge. That'll give the neighbours something to listen to ! 

Built in echo, reverb, chorus  & delay  - way to go !

Regards,      Michael

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 Posted: Fri Dec 16th, 2016 03:18 am
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Hi Michael :wave:

I'll 'see off' that Hartke 4x10 rubbish of yours, any day of the week. ;)

What you need, to REALLY get down to a low-B 30-Hertz...

...is an Eminence 'Beta' 15" mounted in an 'H-Frame' !

Prepare for GENUINE screw-loosening & plaster cracking BASS !!

:shocked:

.


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 Posted: Fri Dec 16th, 2016 07:59 am
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Interesting looking cab design Si. No reflex, no baffle.
 "T.S.E.C." ??  - never come across them, whose their Agent ? One of these fusion, world music ethno collectives I suppose ?
I've found that it's quality vs volume. For studio quality low frequency richness, definitely a 15" Eminence or similar. For working gigs where the kids want noise, shift some air with multiple 10"s - it ain't exactly Mozart that's going down.
Now how do I wire a Tsunami chip into a Fender ?  Regards,   Michael. 
 Ps: "return" on an IPad doesn't work in aiblue, no problem.



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So you are not far away from my recent test setup. At the moment I use a guitar amp/speaker combo.







To connect the speaker exit of your Tsunami to the line in of your amplifier, you will have to use a high/low level or impedance converter like the one Si has introduced a few posts ago.

As your Tsunami Sound decoder is a pure DCC device including motor control, as I suppose, you have to connect it to your DCC control unit and program it on the same address as the DCC decoder inside the loco, if that is possible. Or you program the two DCC decoder like two locos in double heading.

But I have only a very basic knowledge of this DCC stuff. I tried DCC control about 13 years ago before I start using RC-control for trains.
Juergen


Last edited on Fri Dec 16th, 2016 04:19 pm by Toeffelholm



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 Posted: Sun Dec 18th, 2016 01:45 am
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Here's a first little sound sample.

DelTang RC and Phoenix sound module.With under layout bass speaker and bluetooth connected loco speaker.Will be later on improved with better bass speaker.


Fenrir sound sample

Juergen

Last edited on Sun Dec 18th, 2016 01:48 am by Toeffelholm



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 Posted: Sun Dec 18th, 2016 03:29 am
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GRRRReat.   I am looking forward to being able to add sound with DelTang radio gear to my 1/24th critters.  Hopefully some smaller boards will make their way to the market soon.  
Bob



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Very effective Juergen. Being in the DCC camp, I've absolutely no knowledge of RC (other than what's been written on here and much of that has gone over my head!) but RC and sound don't seem to be a problem.

Last edited on Sun Dec 18th, 2016 04:03 am by slateworks



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 Posted: Sun Dec 18th, 2016 12:49 pm
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Hi Doug and Bob,

yes DelTang works with sound, but from the technical boundary conditions of DelTang and and of sound modules that are not dedicated to DCC alone, this was never a problem.

But please, that's not the topic here. This sound sample shall be a contribution to Si's "Replicant" aproach, using the parts Si has introduced here to feed an under layout sound system, and to send sound wireless everywhere you want by a bluetooth device. 

And that will work with any sound source. It's a Phoenix sound controlled by DelTang in my case, but will work as well with a DCC Decoder/Sound placed apart from the loco or with a MP3 player or SD card player that is fed with your own loco sound or with an ambient sound of e.g. a harbour scene.  

So Bob, size of a sound module doesn't matter, because it is placed outside the layout as I have shown in the "sound box" picture some posts above. In case of a small layout you can go with an under/over  layout speaker(s) alone and drop the bluetooth part if the bluetooth receiver doesn't fit inside the loco. I can give you the measurements of the bluetooth receiver if you want. 






The interaction of DelTang and my Phoenix sound module as such is explained here:  Phoenix sound and Rx65




Juergen

Last edited on Sun Dec 18th, 2016 02:07 pm by Toeffelholm



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Hi Bob & all.

This is the Bluetooth board which Juergen has used in his critter.
There are numerous Bluetooth receiver boards around.
This one has a BUILT IN amplifier, of 3W+3W (some don't).
It is available on eBay for $2 a couple of bucks, inc. P&P.
The dimensions of the board are 40mm x 24mm.
It requires a 5-Volt power supply. 
Which could be derived from a 2-cell LiPo battery. 
Using a simple & cheap '7805' (or similar) 3-pin Voltage-regulator.

:moose:

Si.

I am investigating an EVEN SMALLER option or two at present as well.

Attachment: Blue.jpg (Downloaded 290 times)



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This is interesting. Thank you guys for the research and the time and effort to post for others to see. Stephen

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Just to add to the 'experimental junk' on the work bench...
...I thought I'd get some SUPER CAPACITORS to blow-up !! :shocked:

This seems like an excellent cheap place to get them from :-

http://www.ebay.co.uk/itm/Supercapacitor-2-7V-5-5V-0-33F-0-47F-1F-1-5F-2F-4F-10F-1-5-2-8-10-12-16-20Pcs-/371739963986?var=&hash=item568d6db252:m:mZrrX4rtIbJrvSi6ZA-KLRw

They have TONS of different values & sizes & Voltages to choose from.
I bought five 1.5 Farad, 2.7 Volt ones to check out.
They seemed to be the most suitable for space saving & power capacity.
They were pretty cheap I think, at only £1.49p inc. P&P for five.

:bg:

Si.

Attachment: s-l300.jpg (Downloaded 194 times)



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@Si
I'm afraid what you'll get is just that - some stuff to blow up. Be aware that there are many  outlets around that sell off the factory rejects, same case with cheap Lipos. Tell us your experiences with that SumTingWong store:glad:



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@Helmut


Ah, a nay sayer !

My favorite type of customer !!

Always ready & willing to pay TEN TIMES the going rate, for exactly the same stuff.


As a well seasoned & experienced buyer, of large quantities of electronic components, for many years, I can't agree with your assumption.


Also the very fact that buying parts from eBay, allows you to see & read ACCURATE customer feedback, regarding the parts & performance of a supplier, makes comments like yours even more strange.

There's just no reason for busy eBay suppliers of electronic components to sell anything other than 'normal' parts.

They are making plenty of money anyway, so why mess with these 'alleged' factory-rejects ? and have endless returns & complaints.

I have NEVER bought ANY sub-standard parts from this type of supplier, EVER.


I do have a story about a sanded & lasered J74, but that aint what we're talking about here.

I've even come across people who CLAIM that there are 'fakes' of Philips DAC chips about ... Oh dear ...


Over the years, I can hardly recall any instance EVER of actually buying & using ANY duff electronic parts.

Yet the first thing you'll hear when 'the experts' get talking about suppliers, is how MONEY guarantees quality.

What a load of TOSH mate !


It's a 'state of mind' Helmut & I have the good fortune to generally think, buy & design stuff 'outside the box' !


I guess the free glass of Champagne from the 'successful' battery salesman, is enough to convince most people that 'their' money is in safe hands !

Yeah RIGHT !


Si.


The world keeps turning & the supply chain keeps rolling on . . .



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 Posted: Thu Feb 9th, 2017 11:40 pm
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@Si
I had such an experience with cheap NiMHs from China - but agreed, I too have done many satisfactory buys for a song from alibaba. It's just about what supplier you choose - remember the pushbutton issue? I'd like to know, if you find the time, what the DC ESR and the leakage current of the cylindrical ( The real supercaps ) types actually is.



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@Helmut


Yes, I remember 'the push button issue' very well.

I didn't bother to continue that conversation, since it was obviously going nowhere.


I don't believe for a minute that there are 'cheap copies' of THAT switch out there whatsoever !

It is just a CRAP switch !

It is clearly a problem part, which I could probably write another several long paragraphs about, but why bother ?


It was clear that You, John, Johns club, Me, and probably a ton of others ALL had the same problem with it.

Even in my case, when the switch was speced. and used PROPERLY, and not for 'high strain' solenoid operation !

Also you actually kinda implied that I was wrongly using the switch for a 'low voltage' application as well, which to anyone who 'knows', I was not.


That poorly designed component, I believe, was probably manufactured DECADES ago, yet is still out there & being sold even by supposedly 'decent' suppliers, to this day.


Copies ?

NO ! ... There are no 'copies' of that part.

1 part, 1 set of tools, 1 factory, would be my guess.

I have to say, that I am ASTOUNDED that Rapid Electronics are dealing with THAT switch.

I simply cannot believe that ANY experienced professional parts specer would go near it !


Si.


Now THE RUSSIANS !

They made some seriously GREAT electronic parts, back in the day !

Some of their stuff, really puts European, U.S. and Far East manufacturers to shame.

They also made the odd CRAP part or two as well . . .


Not many though ... The thought of a one way trip to Siberia, kinda makes the factory Q.C. guy do his job well !

In the West of course, MONEY is the motivating factor !



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' M:R:W Motor Speedway !!! ' - 1:32 Slotcar Racing Layout
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Lee,

Your friend can still return that TV.  See that nasty scuff mark on the side of it?  Must of been damaged in transit.  Don't want a TV with a scuff mark on it...store's gotta take it back.


Ah, the good 'ole days when life was simpler and everything wasn't computerized in some way.  Now ya need a Masters in IT to make some stuff work.




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Hi,

has anyone made some efforts toward loco sound or layout sound since the last contributions?

After spending much of my limited time for scenery and layout building - because for what use is the best layout sound if you don't have a layout - I want to proceed with my sound laboratory. 

After I have tried this high quality phoenix sound I will try a not exactly velocity dependent sound using two sound files of a petrol critter that represent two different velocities (purchased on ACME engineering). Although I would have to waive the starting and shutdown sequence then.

I have bought the sd card player linked at the bottom for this task. Basically thought for use with an Arduino the can also be operated as simple MP3 player. You can only play sounds stored on the device forward and backward then.


WTV020SD




Juergen

Last edited on Tue Feb 27th, 2018 06:32 pm by Toeffelholm



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 Posted: Tue Feb 27th, 2018 07:44 pm
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Hi Juergen :wave:



I am pleased to hear that your Phoenix Sound is working good.

It was nice to have our conversations about this at the time. :bg:



The small MP3 SD Card Player 'WTV020-SD-16P' looks like a very interesting board.

I can afford it as well, at a very nice price of only £1.21p inc. P&P !! :P

Well done for finding it.





It goes to show, just how many different & affordable options are available for the sound experimenter. :old dude:



I had not seen these ultra-small 'buttonless' boards before ...

... perhaps because I was focused on finding the best small 'panel mount' option.



I guess I should buy one & check it out ! L:

Still need to buy & check out the ultra-small 'Bluetooth' board we talked about some while back.



My available time recently, has been spent on modeling my car-builds mostly. :thumb:

Other than some R.C. experimentation, electronics has been a low priority here at present.

Partly because I spend a lot of time working with electronics & as a break scratchbuilding rests my brain ! :P



The new board looks  C :cool: :cool: L  Juergen !

Nice price & very simple as well !!



This is really what >> THE REPLICANT << Thread is all about ...

... things that ordinary-folk, not rocket-scientists, can understand, afford & can easily experiment with. :!:



:pimp:



Si.



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 Posted: Tue Feb 27th, 2018 09:06 pm
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Some more info. on the 'WTV020-SD-16P' board & simpler versions.



Although this board has a pretty complex array of 16-pins ...

... many of them are often unused, so it is not as complex as it may appear at first.

'Arduino' use, which is not an option many will understand or need, uses many of these pins.



There are simpler versions of this board available so I see, for regular use.



The 'WTV020' seems to refer to the basic chip-type, the board is constructed around.

The 'SD' means it has an SD slot.

The '16P' means it is a 16-pin implementation.





This schematic shows the board wired in it's most basic form.

It seems to have a very-small built-in amplifier.

Play ... Pause ... Reset ... Buttons are shown connected.





Below, some extra MP3 Player type function buttons are wired in as well.

Again using the very-small built-in amplifier.





Below again, a schematic with an external amplifier connected to the basic 16-pin board.

Volume Up/Down & track Next/Previous buttons have been added as well.





Just some quick research.

It appears the device is Mono ? ... Only 1 audio-output ( Left/Mono ) & 1 audio-amplifier seem available.



Here is a simpler looking version, with less output-pins & a different board shape.

Probably intended for easier, basic operation, without any complex 'Arduino' issues.

The 16-pin version ^^ can be operated as it stands of course as well, as seen above.






Even just a very brief look on eBay in regard to similar devices to these ...

... revealed a whole host of different sizes, pin-outs & options ...

... for what could all be considered basically as :-


Buttonless MP3 Players ! :brill:



:cool:



:dope:  Orrrff to do some rocket-science !  ;)



Si.



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 Posted: Sat Mar 17th, 2018 03:26 am
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Si.
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Hi Juergen :wave:



No I haven't bought one of the mini SD-Player boards ... YET.





( mini SD-Player board )



I'm still to get one of the 'Bluetooth' sound receiving boards as well.





( 'Bluetooth' sound receiving board, with built-in amplifier )



But I did do a little bit of research on the mini SD-Player board though.

The schematics I found, I Posted on >> THE REPLICANT << Thread. :bg:

SD-Player Board ... Schematics & Research





( some of Juergens seriously  C :cool: :cool: L  steampunk DIY Victorian $4!7  ! )



I know your transmitters have some extra ^^ switches I think, sprung toggles ? L:

Each 1 potentially sending some kind of 'pulse' to the R.C. receiver I believe.

So yes, in theory, I guess one of these switches could 'pulse' the SD-player board, through it's 'tracks'.





( More steampunk brass & batteries, from Dr. Sartorius, built in The Mad Professors lab. ! )



Interesting sound possibilities, like . . .

Loco - Clanking sound.

Cat - Meeyowing !

Emilia - "Nearly at the station"

Loco - Hooter

Cat - More Meeyowing

Emilia - "Out the way $4!7 for brains !" :f:

etc. etc.



The options on the SD-Player board, are there for either built in amplifier, or line-level signal OUT to a separate amplifier.

Whether the 'pulse' from your transmitter, going to the receiver, is compatible with the SD-player board, I don't know.


L:


I also suddenly realized, that I guess because your 'Phoenix' sound board is NOT in the loco ...

... but in your 'box of tricks', I guess you can use the same 'Phoenix' board for more than 1 loco. :)





( Juergens 'Box Of Tricks' ... Built by Dr. Sartorius, in The Mad Professors lab ! )



I think with some nice sound-samples, loaded as a series of 'tracks' ...

... an interesting & seemingly random & non-repetitive sound sequence could be heard.



It's good that there is hopefully a bit of spare space in the big 7/8ths locos to fit all this in.

But I guess that space could still fill up pretty fast. :shocked:



It is a pretty good solution altogether though, for the application of sound to an R.C. loco ...

... which as I understand it, is normally pretty difficult, or impossible ?? ... :us:

... unless you are using the 'Tam Valley' DCC R.C. system.



Pioneering stuff !! :thumb:



:moose:



Si.




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 Posted: Sat Mar 17th, 2018 12:24 pm
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Hi Si,

yes the general control of this SD card player with single switches on the Tx,
will be rather simple with a DelTang Rx65 I think. 

My thoughts at the moment are more around the "loop mode" of this device,
and trying to understand the manual how it it activated and what is looped.
Single sound files on the card, or the whole card content.

Juergen




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 Posted: Sat Mar 17th, 2018 05:37 pm
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Hi Juergen :wave:



I am not totally 100% sure on EXACTLY how you have your 'Box Of Tricks' wired up. L:



If you have a spare minute, can you draw a very simple 'block-diagram' of the signal-flows.

It doesn't have to show every single wire & connection etc.

Just a rectangle with the name of the device in it & an arrow to the following devices input is fine.



Very simple minimalist styleee, I'm sure you know what I mean. :)





At the bottom, I think I see the 'transmitter-board' left & clearly the 'impedance-converter-board' right. L:

At the top, I see an UNKNOWN ? connector-block & device ... ???

... followed by, I think, the 'Phoenix' sound-board in a small plastic-box ... ???

... followed by what looks like your black-plastic P.S.U. power-supply-unit ...

... & lastly, top far right, what I know is the audio 'low-pass-filter-board' we talked about. :thumb:



It might help to just draw a real quick & simple block-diagram of the boards in Emilias loco as well.

A simple pencil drawing of rectangle with a name in it & an arrow to the following device is fine.



:moose:



Si.



Actually, I think it's the 'transmitter-board' in the small plastic box ...

... & the 'Phoenix' sound-board is at the bottom left.

The thing at the top left, looks unconnected to me, what is it ?




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 Posted: Sat Mar 17th, 2018 08:22 pm
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Hi Si,

Will see if I can find time for drawing something.
Most things you have identified yourself.


The device top left is just a relay serving as electrical load for the Phoenix board, instead of a motor.

The Phoenix board is bottom left.
The Phoenix speaker exits are connected to both inputs of the impedance-converter.
One line-in signal from the converter (there are 2, for left and right) feeds this black "Terris" box above,
which is simply the Bluetooth transmitter sending the sound signal to the loco.
The other line-in signal feeds the low-pass filter and from there the under layout speaker (blue cable on the right).

And the little plastic box contains a Rx65 R.C. receiver, controlling the Phoenix board.
Power supply is from a 10Ah power bank coming in at the top in the middle.

The direct connection to the bass speaker and Bluetooth connection to the loco speaker,
showed some slight but audible time-delay in signal transmission.
So I changed the direct connection of the bass speaker to a Bluetooth connection as well.


Juergen




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 Posted: Sun Apr 28th, 2019 06:55 pm
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I'm on the sound route again! 

I modified my loco sound test setup, and the "Sound Transmitter Box" looks like this now:





Top left is the DelTang Rx (plastic box), that controls the Phoenix sound device, bottom left.

The Rx runs in parallel with the Rx in the loco,
and the esc output delivers the velocity dependent control signal for the Phoenix sound card.

Bell and whistle are controlled via 2 function outputs of the Rx. 

Left hand of the Rx is a relay as a kind of inductive load for the motor exit of the Rx.
The  Phoenix doesn't work if there isn't a consumer. 


The speaker wires of the Phoenix sound are connected to the impedance converter,
and from there the sound signal is fed to a Bluetooth transmitter (the black box in the lid),
that transmits the signal to the loco and the under layout speaker at the same time. 


Above the impedance converter there is an audio potentiometer for volume control.
It's connected inbetween the Phoenix speaker output and the impedance converter.
It is so big, because this is a motor-driven potentiometer.
So I can control volume with my DelTang transmitter
.
And can also fade in and out the sound when the loco enters or leaves the scene.
The Connection to the Rx will be explained later if there’s any interest for this aplication.

Power supply is given by a 10Ah (nominal) power bank with a additional 12V output,
via the connector at the rear side of the chest.


The under layout speaker with the test setup for the "Low Frequency Receiver Box",
recently looks like this:











On the right you see this low pass filter device.
 
The little black-box above is the Bluetooth receiver,
receiving the sound signal from the transmitter box.

The signal is fed to the low-pass filter, and from there to an amplifier that drives the speaker.
It's an old subwoofer speaker but without any electronics inside.
So speaker and box only.



With this arrangement the low-frequency part sounds much better now.
I can turn the frequency control down to the lower limit of the low-pass filter now,
that is 22Hz, and can still hear it. 


Only the amplifier is a bit noisy, so have to look for something else. 


For completion, the "Loco Sound Receiver Unit",
still looks like this at the moment:






With speaker, Bluetooth receiver and 5V fixed voltage-regulator.


Juergen






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 Posted: Fri May 31st, 2019 01:23 pm
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If someone is still following,
here's my final setup ....


To transmit sound via Bluetooth to the bass-box speaker as well, will be too effortful,
when several locos are taken into consideration.

I tested direct connection to the bass-box, and Bluetooth to the loco again,
and with the new Bluetooth transmitter, with low latency sound,
both sound sources sound synchronized now.

Also I got back to my guitar-amp/speaker combo,
and with it's additional possibilities to influence the sound.

I got the two sound sources, sounding as one sound,
coming from the loco sufficiently perfect to my ears. 

Recorded sound sample will follow.

The Volume potentiometer is controlled by a separate ESC now
(the little thing on the potentiometer)
via my Tx2 transmitter.










Juergen




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modelling in 1:22.5 on 32mm and 16.5mm track
Actual project: 7/8" scale on 45 mm track
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 Posted: Mon Jun 10th, 2019 03:32 pm
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Toeffelholm
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Here is a actual sound sample Video

Toeffelholm Loco Sound Sample

The quality of the microphones in my camera is not really good, but it gives a first impression.

Juergen

Last edited on Sun Jun 23rd, 2019 10:50 am by Toeffelholm



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modelling in 1:22.5 on 32mm and 16.5mm track
Actual project: 7/8" scale on 45 mm track
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 Posted: Sat Jul 6th, 2019 04:10 pm
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Si.
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Hi Juergen  :wave:



It looks like you've made a few adjustments to your Spag. Bol. box !  ;)

:dt:

I'm sure that the 'real deal' in-the-room sound is  C :cool: :cool: L  !

Pretty impossible to convey with video samples.  :f:



Now those amps that Spinal Tap used, go right up to ELEVEN ! ...

... which is a whole 10% louder than all the others wimpy 10.  :P



:pimp: :pimp: :pimp: :pimp: :pimp:



Si.




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