Yes, the hum. I'm not surprised a simple capacitor won't cut it.
GTB wrote: ↑Sat Dec 16, 2023 10:51 am
Small capacitors are used to suppress electrical 'noise', ie. voltage spikes from the commutator that can cause interference with the electronics in the speed control. It usually manifests as the esc randomly stopping, or resetting, or generally faffing about. It's more likely to happen with digital circuits such as an rc-esc, or a dcc decoder.
Well, that explains why my IP 3V-chassied Malcolm Moore gets erratic above half-throttle. A simple fix.
I'm not finding any 0.1pF capacitors that
aren't surface-mount, let alone locally. Electronics aren't my forte - how absurd would it be to use a
1pf capacitor? They seem to be the lowest I can find locally.
GTB wrote: ↑Sat Dec 16, 2023 10:51 am
I use a simple analog dc speed control in my manual 6V battery powered railmotors, so there's no sound generated in the motor. I've never fitted suppressors to these, the speed controllers are more or less immune to electrical interference.
I've had issues with electrically noisy motors affecting the esc in an rc setup. In that case suppressors didn't work, the final fix was a replacement motor.
A friend of mine also owns a Baguley - he's running RCS r/c, and if memory serves, it too makes this errant noise. And with the same voltage battery pack, it runs far more slowly than mine. I don't think his r/c is causing that. Call it confirmation bias, but I suspect these Baguleys are showing that famous Accucraft "quality" again.
The Essel Fowler's MFA gearmotor ran silently with the aforementioned manual controls..
I have another PWM unit, the Evilbay cheapy I used before switching to Deltang. 2 wires in, 2 wires out. It runs silently in anything I stick it in, so that'll do this loco. I'm selling it anyway.
Drive noise is amplified through the bench, nothing unusual for these Baguleys, they are reasonably quiet on the track.