[Elecraft] KPA500: Bonehead Input Overload

[Ed Pflueger]

I have a K3S and use PERBAND.  While in standby I'm at 100 Watts and in
operate 20 watts kind of fixes the cockpit trouble.  If you don't have a K3S
or K3 You just have to be extra careful.  It works just as well on my other
K3S and KPA1500.  I have the KPA1500 set up when I change bands it goes into
standby mode.  The thing is a lot smarter than me.  HI..

Ed.. AB4IQ

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Andy Durbin
Sent: Friday, May 15, 2020 6:13 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] KPA500: Bonehead Input Overload

Well if it were mine I'd open it up and inspect everything between J3 pin 25
and T1.  I would expect to find a well toasted resistor but I don't know the
KPA500 well enough to know which one.

I think this is the third report I have seen on this reflector of a KPA500
blown by accidental high power input since I built mine.    You have my
sympathy but it validates my philosophy of using proactive rather than
reactive protection.

Please let us know what blew so we can learn from your experience.

73,
Andy, k3wyc
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