I imagine the two holer was built to run the ham limit.
If you inspect the Pi values and calculate back, you will see for what power
level they are constructed.
The drive requirement will be lower with two tubes for the same output
73
Peter
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Jim Isbell, W5JAI
Sent: Sonntag, 11. Februar 2007 18:26
To: List for Amplifiers
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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