At 05:45 PM 10/4/2001 -0500, WA9ALS wrote:
>Near the end of the CQWWRTTY test (30+ hrs), while running only 1000W, we
>heard a buzz from somewhere near the AL-1200. <BIG SNIP> - I think it's
>inherent to the amp not being built for QRO RTTY contesting.
The AL-1200 is a pretty rugged amp. Quoting from Ameritron's literature on
it:"it can deliver power of more than 2500 watts PEP two tone output for a
half hour!". You were running it at only 40% of this at probably less than
a 50% duty cycle - almost QRP for this amp. You may have to look elsewhere
to find this problem.
I recently damaged the PIN4 QSK switch in my AL-1200 because of a bad
connection in the coax.
Jerry W4UK
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