• 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.

AIKIDO line stage

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

I just wired a noval AIKIDO preamp with 6CG7 input and 6DJ8 output.
I want to use it with a regulated 300V PS.
I read somewhere that the R12 component from the RC filter was useless in this configuration but needed to be replaced by 100/500 ohms resistor.
What is it for ?
Limiting current ?
What is the benefit of deleting R12 ?
 

Attachments

  • Aikido All in One.pdf
    465.8 KB · Views: 111
R12 are part of the B+ filter. If your HV is really well regulated, their filtering may not be necessary. If they are already on the board, I wouldn't personally go through the trouble of removing/changing them (unless my B+ voltage were really marginal and they were dropping too many Vs).
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.