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Re: [Amps] 4-1000A color

To: amps@contesting.com
Subject: Re: [Amps] 4-1000A color
From: "Roger (sub1)" <sub1@rogerhalstead.com>
Date: Thu, 26 May 2011 15:04:06 -0400
List-post: <amps@contesting.com">mailto:amps@contesting.com>
On 5/26/2011 10:19 AM, Rob Atkinson wrote:
> I run 3-500zg orange for years with no trouble--you just have to blast
> the air over them;

In my 2K4 they ran quite bright.

> only RF PA tube I know of that isn't supposed to
> show color is the 813

I used to run 813's well past showing color. They were downright 
glowing, yet I never had any problems with them.  Of course back then 
they were $5 to free and "we" as in most hams I knew running them, never 
worried about pushing a tube "a little"

73

Roger (K8RI)

> and if you look at the plate thickness you will
> see why.  There are probably others not meant to show color, but I
> don't know which ones.  I do know the 4x1 isn't one of them.   In
> fact, the way to shorten the life of a 4x1 is to run it light with a
> dark anode if you ask me.  Also run about 8 v. filament hi hi.
>
> Rob
> K5UJ
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