"That's perfectly normal at that low power output. The 50% spec is at full
output."
Thanks for pointing that out. I did a spot check on the same band with KPA500
indicated output of 490 W (LP-100A 500W) and found the efficiency was 60.6%
(61.9% if LP-100A power is used).
73,
Andy k3wyc
ct: Re: [Elecraft] KPA500 cooling and efficiency
On 5/21/2018 23:18, ANDY DURBIN wrote:
> My KPA500 seems horribly inefficient when compared to my TS-590S running a
> similar power output. The data for the heating test showed a PA efficiency
> of 23%, far short of the "appro
On 5/21/2018 23:18, ANDY DURBIN wrote:
My KPA500 seems horribly inefficient when compared to my TS-590S running a similar power
output. The data for the heating test showed a PA efficiency of 23%, far short of the
"approximately 50%" stated in the specification.
That's perfectly normal at
Bob,
I have made no changes to the cooling of my KPA500. I also have no idea to
what extent the designers of the KPA500 studied the thermodynamics of the
design. I have, however, been surprised at how quickly it heats up.I
abandoned a heating test with the amplifier only producing 100
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