Possibly Q1,Q2 are the source of your hiss.
IDK, just a guess.
Can you read the numbers on the actual transistor, not the Kustom numbers from the schematic.
Those 739 op amps are obsolete. check here...
https://www.ssguitar.com/index.php?topic=1605.0
Also check voltages as per the schematic.
Report those please.
IDK, just a guess.
Can you read the numbers on the actual transistor, not the Kustom numbers from the schematic.
Those 739 op amps are obsolete. check here...
https://www.ssguitar.com/index.php?topic=1605.0
Also check voltages as per the schematic.
Report those please.