As amp/vintage TX repair is a part time business here since the 60's Ive
tested a single tube in a two and three tube amp from a 807's to 8877's.
Metal or glass, triode, tetrode, and pentode, they all work well as long as
the common sense already mentioned is observed..
With GG triodes its grid current and with grid driven tetrode and pentodes
the screen current is the most important indicator.
With air system sockets the old adage "go stuff a sock in it" works well!
Carl
Ham since 1955
----- Original Message -----
From: "Donald Fox via Amps" <amps@contesting.com>
To: "Amps@contesting.com" <amps@contesting.com>; "Brett Sims"
<brett@simsranch.com>
Sent: Sunday, August 22, 2021 10:48 PM
Subject: Re: [Amps] Testing Tubes with a Henry 2K
Brett:
In that case, I think you will be fine. The tuning will be a bit off of
course, due to the missing tube. I have done the same thing here with my
Commander 2500 when evaluating a number of 3CX800's one at a time. I did
seal off the missing tube's socket, to be sure the remaining tube had
plenty of air.
Don N8ECH
On Sunday, August 22, 2021, 10:02:29 PM EDT, Brett Sims
<brett@simsranch.com> wrote:
Appreciate the responses. My Henry 2K also has the filaments in parallel.
Your right, it was originally designed for 3-400's. I failed to mention in
my original post, it was upgraded to 3-500's with appropriate chimneys and
caps. It works great.
So if you have a Henry 2k with filaments in parallel and currently runs
two 3-500Z's with appropriate chimneys, could one test a single tube?
Wadda ya think?
Thanks Brett N5SQK
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