Hey Mprall00,

How did you go about wiring up the 500k pot to replace r17? Did you just wire it as a variable resistor?

I've followed this thread and modded my tsa30 to have the all-tube signal path I'd hoped the amp would have when I bought it! However, without some means of attenuating the signal before the factory volume knob(i.e. the r17 pot mod), the signal is slightly distorted.

What's the advantage of replacing r17 with a pot vs replacing r13 with a pot? Could both r13 and r17 be replaced with pots to control signal gain at both stages?

Thanks in advance for any and all knowledge shared!