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Re: [Amps] Testing Tubes with a Henry 2K

To: "" <>
Subject: Re: [Amps] Testing Tubes with a Henry 2K
From: Donald Fox via Amps <>
Reply-to: Donald Fox <>
Date: Sun, 22 Aug 2021 02:30:18 +0000 (UTC)
List-post: <>
Henry tended to run the filaments in their 3-500z amps in series. The upside is 
a lower current filament circuit, The downside of course, is you can't run only 
1 tube at a time.

     On Saturday, August 21, 2021, 10:24:58 PM EDT, Brett Sims 
<> wrote:  
 I have three used 3-500Z tubes I'd like to test.  Can I safely test them one 
at a time in a Henry 2K?      My thought is this will allow me to better 
classify each tube individually and perhaps better match two of the tubes.  
Providing the tubes prove useable.

Not sure it matters, but the Henry has had the HV power supply upgraded with 
new electrolytic caps and the rectifier tubes replaced with high voltage 
"potted" diodes. 

Any thoughts or comments?

Thanks  Brett  N5SQK
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