Just did an install in a USA GP-30 with the new diesel receiver. There have been issues with the PWC from the the REVOLUTION receiver and the main USA boards not operating the lighting properly.... ... I did a bit of an experiment and installed the receiver and battery in a battery car along with a 57091 PWC to Linear board designed for the trackside receiver.
Just unplugged the track pickups, plugged in a plug to just one of the input plugs, installed the speaker in the fuel tank along with a RAM alternateing ditch light kit, fired it up and everything works quite nicely... Used a 4 pin connector between the battery car and loco. Red and black for power, green and yellow for speaker.
All the lights work just fine with that hookup... For an extra few bucks, the PWC USA problem appears to be solved...
Sound is more than adequate,
Great bell on #2 button,
Horn on #3 button could be be better if it could be manually controlled but it's still very nice in the grade crossing mode.
Volume up and down works great with #7-#9 buttons.
New "soft" buttons on the TX are a plus although I have had a couple stick if I pushed them off center. No big deal.
First big test for run times tomorrow in 18.5 5600 mAh battery......
As ole' Mikey says.... I like it...