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Author Topic: Sound Dummy  (Read 1188 times)

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wm3798

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Sound Dummy
« on: November 28, 2011, 01:43:33 PM »
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I had a box of parts from Bob, basically everything but the frame for a Life Like C Liner.  He gave me another A-B set to put decoders in, so I salvaged the parts, whipped up a frame, and created a dummy B unit to carry a sound board.


It's prewired, and ready to accept the decoder and speaker as soon as they arrive.  I fabbed the frame out of sheet styrene, used some phosphor bronze strip I gleaned from an old telephone to make the contact strips, and the weights came from the scrap box.

I took the tower gears out of the trucks, and it rolls as effortlessly as a brand new Micro Trains car... 

It's currently being test driven on the layout with excellent results.

Lee
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Rockin' It Old School

Lee Weldon www.wmrywesternlines.net

seusscaboose

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Re: Sound Dummy
« Reply #1 on: November 28, 2011, 01:58:21 PM »
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the problem i had with mine (did somethign similar) was the need for a capacitor on the MRC 1st gen sound decoders based on the unreliable power pickup (dirty wheels/track/bouncedy bounce of the rails)...

i eventually sold it b/c i got tired of hearing the rest all the time...

alas... a capacitor may have solved my problems...

anyway...

lesson learned.. for what it is worth
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Bob Bufkin

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Re: Sound Dummy
« Reply #2 on: November 28, 2011, 02:03:30 PM »
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Would this one be a good fit?  Others have standard EMD sounds and Maybe with this one I can tweat it to sound somewhat like an FM.

Digitrax SDN144PS
Generic Steam or Diesel fits NMRA 8 pin plug
1.0 Amp (2.0 Amps Peak) 
Size ,1.22” x 0.40” x 0.11”
Installation , 8-pin Medium Plug
Function Outputs , 4-200mA
Part # SDN144PS
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wm3798

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Re: Sound Dummy
« Reply #3 on: November 28, 2011, 06:08:24 PM »
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Looks like it should work.  You could probably get a bigger speaker.  There's plenty of room in there...

Check to make sure the capacitor comes with it.  I'm pretty sure it does.
Lee
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Lee Weldon www.wmrywesternlines.net
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