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In Reply to: RE: Need Settings for 6N1P for Hickock 539A Tester...... posted by Chip647 on December 06, 2014 at 09:33:26
"The tranconductance is 7,500 versus the 6DJ8s 12,500. The mu is the same at 33. They bias almost identically."
My first-time experience with those tubes on a Hickok 6000 wasn't at all like that. They were nowhere close to 6DJ8s. In the end, I tested them as 12AV7s, but with an expected Gm of 2500-2900. That's a very wide window, mostly because they were so inconsistent, even within the same envelope.
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Buy Chinese. Bury freedom.
Follow Ups:
When I first asked this question, I thought there might be as easier answer. Searching the internet, there seems not to be a good answer.
From Wiki - The closest western equivalent to the 6N1P is the well known 6BQ7A
I tried some various settings on my Tube Tester and the 12AV7 settings made the tube glow 'uncomfortably red'. The filament settings for the 12AV7 was 12 volts while the 6BQ7A was 6.3 volts.
Cut-Throat
Compare tubes to the average measurement of new tubes. These are all relativistic measurements anyway. You will never run a tube in a circuit exactly how it is set up on your tester. You only want to know how the tube compares to new anyway.
nt
Cut-Throat
Sorry, I should have been clear about that. I often use tube types listed with different filament voltages to test a tube with unpublished or unknown specs. The filament selector has to be set for the appropriate voltage when the substituti0n is made. Maybe the 6BQ7 is a closer match, I don't know. I didn't find that info at the time.
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Buy Chinese. Bury freedom.
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