Hello,
Just recently purchased an old layout sitting around for 10+years that has an old MRC 2000 dcc system. I have noticed today that the output fluctuates between 5v an 22.3v’s. When I have checked this before it has always been around 12.8v’s. Is this normal or has the system started to go south? (it is set on HO/N scale).
It is being driven by the AC side of a standard power pack.
Thanks.
Make sure Throttle 1, Set 1, Group A is not being adjusted and is set to stop - this one uses zero stretching to run a non-decoder DC loco, and as such alters the waveform of the DCC signal and will appear as a voltage change to s standard meter.
–Randy
Also check your power distribution. If you’re depending on rail joiners, that could cause problems with voltage fluctuation around the layout. A good bus-and-feeder distrubution system is necessary.
Randy,
Thanks, actually the loco is one being run on throttle #1, set 1, group A. I will check this out for sure as I never noticed it with any of the other loco’s.
Kevin
I had an MRC 2000 some years ago. “The DCC voltage at the controller output was about 13 VAC.”
The DC voltage going to the track depended on the setting of throttle #1.
Is your meter reliable? Is the AC voltage from the power pack constant?
Rich