crystal cutter amp

[45rpmdude]

Pkrd bell fone.o.chord. Need basic schematic. Turn over cutting head

Need parts like caps. Need correct reading resisters.. any help.. last step besides re setting arm to correct arm posture.

[Angus McCarthy]

There's sometimes a schematic inside of the case. Failing that, you can try going through the amp and trace the circuits. You shouldn't have to replace resistors. The only thing that tends to disintegrate are the old electrolytic caps. Leave the mica caps since they won't dry out. The best places to find caps for older amps would be from someone who sells supplies for antique radio repair.

[markrob]

Hi,

Also, replace the old paper/foil caps as then tend have high leakage current after these many years. They are usually, the wax coated units.

Mark