On Fri, 13 Jan 2012, Stefan Schäfer wrote:
There are a few possible reasons why the PA blows up. I am more and more
convinced that it comes from the drive stage. Late in the night i got the
I've been thinking along these lines too. I fried an IRF640, replaced it
with an IRFP260, and was heartbroken when that fried too. I put another
260 in and half-fried that one -- it still puts out a bit of RF, but the
input is a triangle and not a square so the gate impedance is way down.
The TX is a class E driven with a juction transistor totem pole. The
plan is to replace this with a fet driver eg: 4427.
73
Joe VO1NA
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