Mark,
Interesting that you post this question today as I ran my Centurion on AM
for the first time yesterday morning ! I have a Yaesu FT-2000 and the
Centurion (left over from my Omni VI Plus station) and gave it a shot on 75
mtrs AM yesterday morning with very nice results. I loaded the amp at full
power, then backed off the drive from the FT-2000 untill I had about 200
watts carrier output, then touched up the tuning on the amp. It seemed to
work very nicely and the audio got good reports. I didn't worry too much
about the key down time limit, although, I typically probably did not exceed
3-4 minutes. I watched the 3-500Z's and there was a slight glow, but nothing
unacceptable, so I am sure you can run 150-200 watts of carrier for several
minutes.
However, from a fun perspective, it's still more fun to run my Johnson
Ranger I and SX-101A on AM, hi hi !
Have fun and hope to catch you on 40 or 75 AM as conditions improve for the
winter.
73,
Dave, K2DP
St. Louis
----- Original Message -----
From: "Mark DeBord" <markinkpt@hotmail.com>
To: <tentec@contesting.com>
Sent: Sunday, October 05, 2008 11:13 AM
Subject: [TenTec] Operating AM with the Centurion amplifier
I am using the Orion II and the Centurion amplifier. I enjoy operating AM on
occasion with this set-up. I load the amp at full output (using CW), but
then reduce my drive on the rig to only produce total carrier output of the
amp to about 150 watts.
Can I increase my rig's drive to produce more from the amp without a concern
(like 250 watts or so)? How long should I limit my keydown times? Do I need
to add additional cooling with an external fan sitting on top or something
like that? Any suggestions is appreciated.
I found a DX-60B at this year's Ten-Tec hamfest and plan on playing with it
driving the amp too.
Any suggestions is much appreciated.
Mark KA4ICK
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