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Vintage threads from the first ten years

previous: BWilliamson q{Charles doesn't post much over he... -- 4/16/2000 2:50 PM

Re: It Arrived!

4/17/2000 2:08 AM
Farrow	Re: It Arrived! Steve, I made a bias "probe" actually more of a box - the tube sits outside away from the amp because I had problems on certain amps with little tube clearance (AC100) and a few others. Main point is I used seom 4mm banana sockets on the box to hook up my meter. One pair is in series with the cathode (I use the precision shunt in my meter instead of a resistor in the box) and the other set gives me access to the plate and screen pins. By using the cathode pin and one of the other sockets I can figure out plate and screen voltage without opening the amp, with all the tubes installed. Helps a lot. Farrow http://surf.to/pharaohamps

4/17/2000 2:08 AM

Farrow

Re: It Arrived!

Steve, I made a bias "probe" actually more of a box - the tube sits outside away from the amp because I had problems on certain amps with little tube clearance (AC100) and a few others. Main point is I used seom 4mm banana sockets on the box to hook up my meter. One pair is in series with the cathode (I use the precision shunt in my meter instead of a resistor in the box) and the other set gives me access to the plate and screen pins. By using the cathode pin and one of the other sockets I can figure out plate and screen voltage without opening the amp, with all the tubes installed. Helps a lot.

Farrow
http://surf.to/pharaohamps