Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Leevi on February 19, 2024, 05:35:54 am

Title: Mesaboogie Mark III Simul-Class
Post by: Leevi on February 19, 2024, 05:35:54 am

I have this amp on the bench and have localized an issue in bias voltage (220V) on the second pair of the power tubes.



EDIT: I think the cause is voltage leaking to the grid.



/Leevi

Title: Re: Mesaboogie Mark III Simul-Class
Post by: Leevi on February 19, 2024, 10:39:58 am

Solved, it was a leaking coupling cap.


/Leevi