Re: [Elecraft_K3] KPA500 finals blown


dalej <dj2001x@...>
 

I'd be interested to know what the HV tap was set for, what the HV displayed for HV and if there happened to be a voltage surge or spike that came down the mains. All that might contribute to sudden failure. I doubt heat is a factor.

Just a thought.

Dale, K9VUJ

On 21, Jan 2016, at 8:47, vu2nks@yahoo.co.in [Elecraft_K3] <Elecraft_K3@yahoogroups.com> wrote:



KPA500 shut off with a bang while operating RTTY @300W.


Antenna is a steppir beam.

On opening the KPA500,found 2 ceramic? caps of VRF2933

adrift with underside of the said caps,black.

I am in touch with Support.

Has anyone here replaced these devices? This will be my first time
working with power transistors.

73 and HNY,
Nandu
VU2NKS

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