• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

HF-87 Rebuild help

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Jump to Latest
D

DAK808

Member
Joined 2012
If you are using fixed bias you can just run the output tubes "hotter" and that would put you in a good operating point. 430v plate voltage is really a good voltage and not much less than the original B+. Using fixed bias will let you optimize the total amount of B+ you have.
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Top Bottom