Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: isaac_teller on September 20, 2020, 12:45:09 pm

Title: grid leak resistor
Post by: isaac_teller on September 20, 2020, 12:45:09 pm

http://sluckeyamps.com/rocky/rocky.pdf


Hello. I am building a clone of this amp(wanted something all octal for a change). Isn't there supposed to be a grid leak resistor from pin 4 to ground at V2B? Thank you.

Title: Re: grid leak resistor
Post by: DummyLoad on September 20, 2020, 01:18:47 pm

no - it's a DC coupled concertina. DC at the anode of V2A sets the bias for the concertina.


--pete

Title: Re: grid leak resistor
Post by: PRR on September 20, 2020, 07:40:54 pm

> grid leak resistor ....at V2B?

ALL of V2A absorbs any V2B grid leakage. Fine as drawn.

Title: Re: grid leak resistor
Post by: isaac_teller on September 21, 2020, 02:31:05 am

Thank you