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?
Hal
Why do that when you can just change the decoder to a DCC one?, such as a Tsunami or QSI
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.
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.