Author Topic: ESU LokSound in a Walthers N-scae 0-8-0  (Read 736 times)

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jdcolombo

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ESU LokSound in a Walthers N-scae 0-8-0
« on: August 14, 2016, 04:48:26 PM »
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Hi everyone.

While I'm waiting for the new ESU board to come out to finish my diesel sound installations, I've been working on converting my steam fleet.   I'd been putting off doing my Walthers 0-8-0 switcher because of how tiny the tender is and because wiring up the decoder to the pads on the small piece of circuit board at the front of the tender is a pain.  But yesterday I decided it was time to do this project, and it turned out to be remarkably simple.

Here's a photo of the completed installation:



The speaker is a Knowles Fox (9mm x 16mm - now discontinued, but there are replacements available from CUI) in a custom enclosure made from .040 styrene.  It fits perfectly in the coal load of the tender, and I kept it in place by packing in some lead sheet around it, which added some needed weight. 

The decoder is a simple fit in the back, and the photo shows how I wired it all up, including an LED glued to the back of the decoder for the back-up light (note that the wire in-between the blue and red wires at the front of the tender is NOT the black wire; it's the white wire for the headlight, with a piece of black heat-shrink tubing to insulate the joint).  On the right-hand side of the decoder (the right-hand side of the tender) are two 220uf, 16v tantalum caps that provide keep-alive.

And here is a video of the completed engine doing a pickup of two cars at Lorain on my layout (pardon the clicking of the throttle in the background!).  I think the video shows the excellent electronic chuff matching you can achieve with the LokSound (and which I've never achieved with the Econami or Tsunami decoders) and ESU's superb slow-speed motor control:


John C.
« Last Edit: March 01, 2019, 11:49:53 AM by jdcolombo »

powersteamguy1790

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Re: ESU LokSound in a Walthers N-scae 0-8-0
« Reply #1 on: August 14, 2016, 09:00:58 PM »
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Nice work John.

Bob

wazzou

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Re: ESU LokSound in a Walthers N-scae 0-8-0
« Reply #2 on: August 14, 2016, 09:40:31 PM »
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Does it chuff double the times necessary or am I not following the valve gear correctly?
Bryan

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jdcolombo

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Re: ESU LokSound in a Walthers N-scae 0-8-0
« Reply #3 on: August 14, 2016, 09:55:55 PM »
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Does it chuff double the times necessary or am I not following the valve gear correctly?

A standard two-cylinder steam loco should produce exactly four chuffs per revolution of the drivers (it's two per cylinder on each side = 4).  Ideally, the chuffs should come at exactly the 12:00, 3:00, 6:00 and 9:00 position of the main rod connection to the driver.

The chuff timing on my 0-8-0 isn't quite perfect, but it's pretty darn close: 4 chuffs per driver rotation, and nearly at the 12, 3, 6, and 9 rotation points.  The only way I know to get it absolutely perfect is to use a cam which is pretty impractical in N scale (although I think a few folks have accomplished it).  The electronic chuff regulation employed by ESU is as good as I've ever encountered (the Walthers 2-8-8-2, which had a decoder designed by QSI, was also excellent; my experiences with the Econami and Tsunami from Soundtraxx were less than satisfactory on this front, although their sounds are excellent and they have other things - like a six-band equalizer circuit - to recommend them.

John C.

Cajonpassfan

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Re: ESU LokSound in a Walthers N-scae 0-8-0
« Reply #4 on: August 19, 2016, 12:24:22 PM »
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John, great job as usual!
Otto