You can use a stub in the coax to get an easy 20-25dB additional second
harmonic reduction. A lot less hassle in a mono band or just put a stub in
individual antenna leads.
Carl
KM1H
--------------------------------------------------
From: "Carel, pc5m" <pc5m@xs4all.nl>
Sent: Monday, January 26, 2015 10:41 AM
To: <amps@contesting.com>
Subject: [Amps] push pull or parallel ?
Hi,
160mtrs contest past and we need more power... Plan is to add 3 dB by
throwing in another tube (2.5kw anode dissipation Tetrode, grid driven).
I could go for push-pull of just parallel the tube's. I think push-pull
would be nice to get less even harmonics, but seems to be a big hassle and
just put the tube's in parallel is much easier. Or am I missing something
?
73's Carel, pc5m
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