colasblue
pfm Member
I'd say thats actually been made out of 2 160's of slightly different age.
Note the diodes on one are all different to the diodes on the other, and some of the polystyrene caps on one are different to the other, but actually consistent within the board.
I reckon a previous bodger has tred to identify and harmonise any differences in resistor values in an ugly hack sort of a way.
If the feedback loop isn't the problem then I'd initially be looking for dry joints and to identify any differences between resistor values that remain.
I'd also re work all those badly bodged components.
I can fully see why Les didn't want to even touch it! His labour cost for getting that anywhere near respectable would exceed its value. It virtually needs a complete ground up rebuild in my opinion.
Note the diodes on one are all different to the diodes on the other, and some of the polystyrene caps on one are different to the other, but actually consistent within the board.
I reckon a previous bodger has tred to identify and harmonise any differences in resistor values in an ugly hack sort of a way.
If the feedback loop isn't the problem then I'd initially be looking for dry joints and to identify any differences between resistor values that remain.
I'd also re work all those badly bodged components.
I can fully see why Les didn't want to even touch it! His labour cost for getting that anywhere near respectable would exceed its value. It virtually needs a complete ground up rebuild in my opinion.