Anyone "DCC'd" old Atlas WTD Plymouth Switchers??

I did one.   I did use an HO size decoder.   I used a Digitrax DH123AT or some such.  I know it is the Digtrax 123, which is only a 3 function bottom of the line decoder.   It is rated at 2 amps max, I think, and 1.5 amps continuous.   It is pretty small and I think I put it in the cab.    I will get it out and look.    I don't remember any problem with the motor isolation.   I think the brushes are isolated. 

Yes, I did too, HO decoder NCE D13SJR, 8+ years and no problems.

ncng    Image not available Photos not available for this variation

I have one of those Plymouths stored away somewhere, and have been considering installing a decoder in it. I'm thinking of using a TCS "KAT-22" (with "keep-alive" super cap technology) to mitigate the limited number of wheel-rail contact points on a small short wheel-based switcher. I have used these decoders in some of my HO locos and have been very pleased with their performance.

Bill in FtL

By way of thanks to everyone's replies, here's a few pics of my decoder install of one of my Atlas Plymouths. The job was a lot easier than I anticipated!!

I used a Digitrax DH126D.

The motor is isolated from the chassis; the black wire from the harness went to the black pick-up wire; the red harness wire to the chassis mounting-point, 'rear Fireman's side' of the chassis block.

The decoder is neat & small & fits nicely in the Fireman's position (I have an Engineer in place on the other side of the cab!) Wiring for the rear light & a beacon feed into the cab. As it's only a 2-function decoder, I've wired both headlights (warm white LEDs) to F0F(white lead) and a roof beacon (red LED) to F0R(yellow lead). Now I just need to function-map the yellow lead to F1 and make it flash, and make F0F on continuously - not uncommon for a switcher..?

With the cab in place, the decoder is hardly visible from eye-level -

... although it is from a higher vantage point. Maybe a bit of black paint will help disguise it - like it did the chassis block!!

Many thanks again to everyone!!