Sounddecoder SW1200

Sounddecoder SW1200

Postby CN-TT » Sat Jul 05, 2014 11:15 am

Hi,
a fellow "tt-board"er found a sounddecoder for the MTB SW1200 with built-in speaker that fits perfect. And the price is :thumbup:
http://www.tt-board.de/forum/showthread ... post851523

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Re: Sounddecoder SW1200

Postby ConducTTor » Sat Jul 05, 2014 2:55 pm

Any pics of the speaker installation?


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Re: Sounddecoder SW1200

Postby CN-TT » Sat Jul 05, 2014 3:20 pm

It looks like the speaker is facing down towards the rear truck. I'd say this is not bad at all.

http://cgi.ebay.de/ws/eBayISAPI.dll?Vie ... 1339140448
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Re: Sounddecoder SW1200

Postby Bill Dixon » Fri Jul 11, 2014 3:45 am

MRC sound decoder - UGH!

On another forum a while ago I posted a procedure to adjust an MRC sound decoder.
It involved a hammer and an anvil.<G>
Early MRC sound decoders were CRAP.
I haven't heard anything recently to change that opinion and am not willing to spend $$ to find out if the product has improved. However if somebody wants to buy a current MRC sound decoder and send it to me for testing I am willing to give it a try.

If you remove the circuit board in the model there is room for a small ESU sound decoder and a small oval speaker over the front truck.
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Re: Sounddecoder SW1200

Postby ConducTTor » Fri Jul 11, 2014 12:55 pm

I'm against anyone ever using a speaker that has no baffle or enclosure. The sound ends up being tinny and quiet. Huge waste of money. If you're going to do this right, mill out the tank and install the speaker there. For the price of sound decoders I can't fathom why people settle for what they usually get in return.
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Re: Sounddecoder SW1200

Postby Bill Dixon » Tue Sep 02, 2014 2:26 am

I was going to try installing an ESU Micro Sound decoder this weekend but I was stymied when the decoder I received did not work. Tried various methods to recover the decoder with the LokSound programmer but no go. I have to send the decoder back.

That will put a month's delay in the project.
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Re: Sounddecoder SW1200

Postby Bill Dixon » Mon Sep 29, 2014 7:58 pm

Having received a good ESU LokSound Micro decoder (the first one was DOA) this week I am working on the installation this weekend.

It was fun figuring out how to take the model apart. Very simple when you know how.

I cut the circuit board where the motor PC tab sticks up into it. I removed all the misc components but the two 1k resistors for the head light.
The motor power tabs were cut back to the motor PC board.
Note the orange wire goes to the firemans side and the grey wire to the engineers side. You should be able to figure out how I learned that. The rear of the frame that stuck up into the cab was milled down to the step in the casting.
The ESU LokSound Micro is taped to the top of the motor.
For a speaker I am using a Sugar Cube speaker from Litchfield Station mounted in the cab over the rear tuck.
I had to cut away the roof supports in the cab to make room for the speaker.

Sounds amazingly good with good volume.

I am now working on installing a working rear headlight with surface mount LEDs. The decoder also needs a bit of programming. It has the F8 two-step that seems to have been installed in N/A decoders by mistake. Just a few CVs to set to fix the issue.

I will post a video with sound when I am done. I did film the Locomotive with my cell phone camera but the video was far from acceptable. Can you say fecal material? Happily electrons are easy to recycle.<G>
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Re: Sounddecoder SW1200

Postby Bill Dixon » Mon Sep 29, 2014 9:31 pm

Here is a picture of the installation.
20140929 SW1200 Sound.jpg

On the left you can see the part of the circuit board I used as a solder location for track power and front headlight.
The decoder is in the center.

On the right you can see the top of the frame where i milled it down to clear the speaker. the top half has tape on it as the speaker contacts were pressing down on it. To eliminate this problem I both cut back the speaker contacts and removed the roof cross braces so the speaker would fit higher in the cab. You can see the bottom of the speaker in the cab.

The inside left of the shell has been painted black because the LED headlight was shining through it.

Tomorrow at work I will program the decoder and take a short video of it running.
After I am happy with the operation I will add the handrails.
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Re: Sounddecoder SW1200

Postby ConducTTor » Mon Sep 29, 2014 10:04 pm

Bill, is the speaker in an enclosure?
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Re: Sounddecoder SW1200

Postby CN-TT » Mon Sep 29, 2014 10:17 pm

Looking good, Bill!
See you tomorrow at CH. Don't put the engine too far aside! :whistle:

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