[Drake] Matching 6JB6's with a Tube Tester

Tue, 19 Aug 2003 17:40:01 -0700

I used the cathode method in a TR-4CW. The tube tester probably would
work but I would rather match em' where I use em'.
Measure the voltage drop across the cathode resistor for each tube. You
really must have a digital readout voltmeter for this because you will
need to read the voltage in 'tenths' of a volt.

Regards

Dave Harmon
NSRCA 586
[email protected]
Torrance, Ca.

-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of Mark NAce
Sent: Tuesday, August 19, 2003 4:44 PM
To: [email protected]
Subject: [Drake] Matching 6JB6's with a Tube Tester

Dear group,
I have seen several folks mention that Drake finals can be matched using
a good tube tester like a 6000A or TV.  I have also heard that Drake
used to match their finals with a testing setup that used the same plate
& screen voltages, bias, etc. as a working rig, by measuring the cathode
current.  Does anyone have an opinion?  
Thanks for your time
Mark, N5KAE

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