Weaver RS-3 DCC install

I did years ago to an original horizontal drive unit. (you didn't indicate whether yours is single or dual motored) I built it with twin towers so inside room was limited. At the time sound decoders were scarce in O scale. I used a NCE408 and Sountraxx DSX married together.

Later projects of that engine for others had various manf. decoders. Most of them were single tower so there was more room for a larger format decoder.

The single motored unit doesn't require a high amperage decoder. 2-3 amps is sufficient. A LokSound or SoundTraxx decoder will fit nicely. Provided they offer the correct prime mover.

NCE D408 decoders are an easy install in Weaver RS-3's.  I've done at least a half dozen. 

Thanks for the replies - must get to it soon Brian

I have about 8 WEaver single motor RS3s and FAs that I have installed NCE D408SR decoders.    One thing I learned was that with DCC the voltage to the lights is a little higher and the bulbs get hot enough to craze the plastic lenses.   I have replaced the bulbs with LEDS.   I had to replace a bunch of the lenses.

Great idea - good to plan for that and I have plenty of Leds

Chris - two motors in my RS3 - does that mean a larger amp decoder ?

The NCE408 will handle two motors quite nicely. If you're looking for sound, then LokSound and SoundTraxx make small enough boards to fit between the motors. They all are about 4 amps rating.

Thanks again - I don't have sound as I listen to radio/ podcasts when running trains.

The NCE D408SR will handle the 2 motor driver very well.    I have a WEave RS11 with the 2 motor drive which is probably the same.    It draws much less amperage than the single motor drive.

That's great advice - much appreciated