[Elecraft] KPA500 Protection on 60 Meters

[Ron D'Eau Claire]

Remember: 

1) The person who experienced the failure said that he had NEVER used 60
meters! 
2) Eric said he was checking to ensure it was actually the 60 meter filter
that failed. 

Circumstantial evidence so far suggests it was either an EMP from a nearby
lightning strike or similar source or it was just a rare bad part that
failed after two years under normal stress while transmitting. 

73, Ron AC7AC

-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Wes
(N7WS)
Sent: Thursday, November 12, 2015 3:10 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KPA500 Protection on 60 Meters

What low pass filter level?

If this amplifier is going to blow up while delivering specified power then
we better be issued new front panels without the 60 and 30 meter buttons.


On 11/12/2015 3:43 PM, Roy Morris wrote:
> With my KPA500 in OPERATE (asterisk) mode on the 60 meter band, I have
> turned down the K3/100 POWER on all five channels to keep my power level
> from exceeding the low pass filter level.  Hopefully, this will take care
of
> the matter if I forget to take the amp out of the circuit.  Roy  W4WFB