07-24-2012, 11:09 AM
faraway Wrote:I got another GP50 this time it is a NS shell. It came with a DCC decoder integrated into the main PCB. I replaced the PCB with a plain board and added my standard Zimo MX630 DCC decoder. The engine ran awfully :o
Be warned, the DCC version of the GP50 has hidden under the motor massive RFI suppression components (2 * R and 2 C) forming a bridge with connection to the motor housing. That made my DCC decoder run havoc at low speed.
You need to remove they RC element to run with standard DCC decoders!
ps. the engine has NO flywheels
That's a good observation, I have an Athearn RTR SW1500, that despite trying two different decoder doesn't want to behave, and I'm pretty sure the drive train is okay, and it has the genesis (Roco supplied) motor...
However I have used the normal athearn PCB and 'quick plugged' the DCC decoder into it. I have to have a look if there are any RC components (Besides those for lights) still left on it. It runs fine at speed, but low speed performance is poor...
Koos
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