Finally getting around to troubleshooting a few minor problems with my serge panels.
First up was the SWAMP:
The AEP out is sitting at a constant 1.5v and I can't see any pulses.
If I scope the D line I can see the spikes - but when it hits the B board after the first 47k resistor they're gone.
The transistor before the AEP out is at 5v and after the 2k2 resistor it's 1.5v.
I tried swapping out the transistors which didn't make a difference - do they need to be matched at all?
Every other function is working fine.
Cheers
Gerrard