Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: joesatch on December 13, 2024, 08:22:24 am

Title: marshall 2022
Post by: joesatch on December 13, 2024, 08:22:24 am

who's built one of these?

Title: Re: marshall 2022
Post by: SEL49 on December 13, 2024, 08:28:37 am

Quote from: joesatch

what's the 1M resistor from input grid to the cathode of the second triode do? I've seen grid resistors to ground but this goes to the cathode pin ?

There is no grid to cathode resistor.

Read this... https://www.valvewizard.co.uk/dcltp.html

Title: Re: marshall 2022
Post by: joesatch on December 13, 2024, 09:06:26 am

Quote from: SEL49 on December 13, 2024, 08:28:37 am

Quote from: joesatch

what's the 1M resistor from input grid to the cathode of the second triode do? I've seen grid resistors to ground but this goes to the cathode pin ?

There is no grid to cathode resistor.

Read this... https://www.valvewizard.co.uk/dcltp.html

ya i was zoomed in the schematic thought i was looking at V2 preamp tube but that was the PI. only one preamp tube in this