Well if you can find the space you can definitely put a second decoder in any loco. Just tap the power off of the track feeds and isolate the motor and hook it up to the second decoder. After that it's a matter of using CV15 and CV16 to lock one decoder when you're programming the other. For a non-consisted steam loco it shouldn't be that hard. Just get them both programmed to the same address. The only issue I see is the chuff synchronization, but it might be fine. Cant hurt to try.
Springfield PA
Two reasons:
1. Although I have a number of QSI- and Tsunami-equipped engines, I like the sound of my GS-4. In particular, although Tsunamis are good, I don't like the Heavy chuff sound much at higher speeds, even after much tinkering and consulting with Soundtraxx. In general, to me, OEM QSI's and Tsunamis each have a certain "family" sound, and I'd like more variety.
2. Cost of a standard motor decoder is about $18 instead of $95
I did replace MRC's in my Athearn engines with both Tsunami and Rev U decoders, which I considered absolutely necessary. Here my goal is to keep the GS-4 sound and upgrade the motor control flexibility. If I can figure out the circuitry in the GS-4, I'll try a dual arrangement, but decided to ask first.
Hal
Why do that when you can just change the decoder to a DCC one?, such as a Tsunami or QSI
Most of us have found or read about the limitations of MTH HO decoders on DCC by now. They have promised improvements on new models, but no retrofits.
My question: has anyone tried to parallel one with a standard motor-control decoder? If so, did you still have synchonized chuff and other functions working OK?