In a message dated 6/28/2006 10:21:16 AM Eastern Daylight Time,
BTW, TWTA linearizers actually exploit this phenomenon to reduce
overall IMD. Sometimes two wrongs do make a right :)
73, Mike W4EF
I think this whole thread started out when a posted claimed that he was
getting 1800 watts out of an Ameritron AL-1200 with a 100 watts of drive, then
continued to say "additional output could be anticipated with drive up to 130
watts". I don't think with all the hoopla we ever did determine "if in fact"
one would see more power out from the 3CX1200A7 when driven with up to 130
watts. The Ameritron AL-1200 manual does state that the maximum drive
"permissible" for the Al-1200 is 130 watts. So, what does this all mean in
world? One posted claimed that the emission of a 3CX1200A7 falls off at 85
watts. Does it? The Henry 5K uses a pair of 3CX1200A7's (I had one) I saw
3500 watts output with 100 watts drive. Assuming 130 watts of drive
"permissible" per tube, then 260 watts of drive for a pair should yield some
power. I never drove mine past 100 watts since that was all the driving power
have. With my AL-1200 it continues to make power up to 100 watts drive I
don't know what it will do with more drive, but perhaps someone knows. So I
guess the question is Why does Amerritron say you can drive the tube with up
130 watts? And, if one does do that, is that "overdriving it"?? With all
things being equal I think my 100 watts RF is the same as anybody elses
(strickly speaking) and not considering cleanliness.
Since I do not have 130 watts available I don't know just what would happen.
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