My brains on freeze and I can’t think.
I am trying to get my spin on the Twin Drummer , My “Fat Drums” working without success. I have noticed this mistake.
Sams Original.
Mine with the the OPAMPS upside down
Will the above mistake cause the OP-Amp to malfunction.
I have tried bodging it but it does not work ( but may have killed the 72 now.
Cheers
Rob
Yep it’s backwards. You could bodge it on a bit of stripboard to swap pins 2/3 and 5/6.
Nasty one, added to my PCB checklist.
Shouldn’t kill the op amp though, the inputs will have the wrong voltages but not outside the supply range, so not damaging.
Item two:
I already built a strip-board adaptor and the circuit still does not work but perhaps the OA is dead.
So we are saying the circuit defo will not work in that orientation. Maybe I will try another OA on my strip adaptor.
The whole board seems to be a Friday afternoon job. The components are on the wrong side ( someone may have mentioned that ), the front panel alignment top bottom is off so fould the rails. The footprints are wrong for the poly caps.
Hopefully once I have it working I can manage to correct just the PCB and not have to have more panels done also.
Rob
Item five. 
