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Re: [Amps] 3-500zgs

To: Amps <>
Subject: Re: [Amps] 3-500zgs
From: Joe Isabella <>
Date: Sat, 31 Dec 2005 09:35:01 -0800 (PST)
List-post: <>
  I don't think you want to run it in SSB (4kV) mode with a continuous output 
(like data or AM).  My 3K-A with RF Parts ZGs will do that, too but the Tubes 
get pretty bright orange!!  I can get almost 2500W PEP out of it with ~175W 
drive, but I stick to 80-100W or so.
  On AM, I leave it in CW (3kV) and drive it to 375W Carrier.  Seems like it'll 
make output there aaaallllll daaaayyyyy  looooooongggg...  And the tubes only 
show a little color.  (You know how us AM'ers are!!  :-)  )
  Joe, N3JI

Gene Bigham <> wrote:
  The two 3-500zg's I put in my Henry 2K Classic X show little color at 1 KW 
on data modes, modest color, dull red to low orange at 1.5KW mode.
The former is with 3 Kv on anode and the later is with 4 Kv on the anode and 
approximately .800 current on the plate. Of course this amplifier had a 
squirrel cage blower with plenmty of air going through.
The grid is showing 

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