Most 100 watt PEP transceivers will reduce power to 25 watts of carrier for
the AM mode. Amps like the Centurion have about 10 dB to 11 dB of gain thus
25 watts of drive will produce about 250 watts of carrier.
I never advocate tuning a linear amp at anything but for maximum output with
recommended drive. Just keep the grid current and plate current at or
below maximum rated values. Then if one wishes to reduce power or operate
at a lesser level, reduce the drive and the amp will always be linear.
Tuning at a lower power level will not assure linear operation and it can
shorten tube life.
73
Bob, K4TAX
----- Original Message -----
From: "Kim Elmore" <cw_de_n5op@sbcglobal.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, August 01, 2014 7:34 PM
Subject: Re: [TenTec] Centurion and AM
How about this: Tune the amp for its maximum clean PEP output at whatever
drive level is needed. Switch to AM and adjust the carrier level to 1/4 of
that output. Then operate happily.
Kim N5OP
On 8/1/2014 7:28 PM, george fritkin via TenTec wrote:
200 to 250 watts AM results in 800 to 1000 watts PEP at 100% modulation.
Three 811 tubes can not handle that power. However if you are using low
level AM from your xcvr you probably won't get 100% modulation so it
might not be a problem. If it were me, I would drop the power to 150
watts to be safe
Just my opinion
George, W6GF
On Friday, August 1, 2014 4:57 PM, Robert <rmcgraw@blomand.net> wrote:
Yes. Run about 200 to 250 watts of carrier BUT tune it for max output
with 100 watts of drive. Then switch to AM mode and adjust drive as
necessary. Do not change amp tuning after switching to AM mode.
73
BOB, K4TAX
Sent from my iPhone
On Aug 1, 2014, at 5:40 PM, Timothy Johnston
<timothy.f.johnston@gmail.com> wrote:
Can the Centurion (422b) be used with AM mode? The manual does not
mention
it.
73 de Tj, K4TFJ ...
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--
Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP
SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)
/"In theory there is no difference between theory and practice. But, in
practice, there is." //-- Attributed to many people; it's so true that it
doesn't matter who said it./
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