Glory hole gain switch mod possible ?

[Bobbyd67]

I just ordered some glory hole pcbs and was wondering if it's at all possible to add the V4 gain switch as a mod ! Idunno how exactly the gain boost is triggered but if it's like a 1-2 resistors switch it should be easy ?

Thanks in advance if anyone is familiar with the circuit and can help me out !! If not it's all good ^^ I will just build them stock

 

[Robert]

The V4 looks like a significantly different circuit from the V3.

The toggle switch (and remote jack) appear to control a relay.

The V4 looks to have four LEDs instead of standard diodes, and I suspect the symmetry is changed by the relay. It's also probably altering the gain of one of the opamp stages. This is all just speculation based on a pic, of course.

 

[Bobbyd67]

Thanks for the quick reply! I'll just build it stock then I ordered 2 so maybe I will build a double version like a KOT . Haven't decided yet !