[Amps] 1 tube or two ??

[EP Swynar]

Hi Jim,

Yup --- running at full tilt, the two-tuber would have a whopping(!) 3 db.
advantage over the single 4-1000A!

That's a full half S-unit difference...something worth striving for(?).
:>)

~73!~ Eddy VE3CUI - VE3XZ




----- Original Message ----- 
From: "Jim Isbell, W5JAI" <jim.isbell at gmail.com>
To: "List for Amplifiers" <amps at contesting.com>
Sent: Sunday, February 11, 2007 12:26 PM
Subject: [Amps] 1 tube or two ??


> I have not heard anything from this list in months so maybe I am not
> still subscribed.  Please respond directly to me just in case.
>
> I have two Linears that use 4-1000A tubes.  One is a single 4-1000A
> and the other has two tubes in parallel.
>
> Is there an advantage of one over the other if both are run at the
> limit for the Ham Bands?  Even the single tube will not be over
> stressed at that level with 3500Volts on the plate.  Will the drive
> requirement be lower using two tubes?
>
> I don't understand why the two different designs were built as they
> were both built by the same Ham.  One must have had an advantage.
>
>
>
> -- 
> Jim Isbell
> "If you are not living on the edge, well then,
> you are just taking up too much space."
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