ORIGINAL MESSAGE:
At 02:46 AM 8/22/2006, Gudguyham@aol.com wrote:
>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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Good questions. If I still had the amp I would investigate further.
It could be my line voltage was a bit low. It's been ten years so I
don't remember for sure. It was close enough to 1500w that I just let
it go, but it was mildly annoying.
The two transceivers were both TS-850S/AT, mine and a friend's.
Bill, W6WRT
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