In a message dated 8/21/2006 9:16:31 A.M. Eastern Standard Time,
dezrat@copper.net writes:
FWIW, I could never get more than about 1300 watts out of my AL=1200
with 100 watts drive. I used two different transceivers and two
different power meters.
--
Bill, W6WRT
Bill, I have had MANY AL-1200's. I'd say I have dealt with about 20 of them
over the years and every one I have had would make a maximum of 1800 watts.
They were all tested into a Bird dummy load using a Bird 43 watt meter and
checked against other watt meters as well. No chance that there were bogus
readings here. I will say however, that the tube must be right up to snuff
and
the HV should be at least 3600 or better at idle to make these numbers.
Basically I always use a Yeasu FT-847 to check all the amps out. I do not see
more than 100 watts out from it. I have noticed that the MOST temper mental
HF rigs for cutting back on power into a "load" is the Icom line up of radios.
If you told me you were using an Icom as an exciter I would tend to fault
the exciter, however you mention you have used various exciters. Perhaps your
tube is a little off on gain? As I mentioned many times before the AL-1500
and the AL-1200 and the AL-82 are all basically the SAME amp, everything
pretty much the same except for the tube. I have also dealt with many
AL-1500's
and AL-82's. I actually convert AL-1200's and AL-82's over to 8877's. I have
done several of these. My experience is that an AL-1500 will make a maximum
of about 2250 watts with 100 watts drive. An AL-1200 a max of 1800w and an
AL-82 1500-1600w (depending). I have obtained these figures time after time
with all parameters being what they should on all of the amps. This is to
say the tubes are right up to par. Would be very interested to know what
yours
is so off the mark. 73 Lou
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