[Elecraft] QRO - KPA500 Failure

[K9MA]

That's very high efficiency for a solid-state amplifier. Are they 
operating in class C? Are there any IMD specs at those output levels?

73,
Scott K9MA



On 2/11/2020 03:18, Edward R Cole wrote:
> I checked the operating specs on two of my QRO amps.  Not a KPA500.
>
> 2m-1500w PA using a MRF1K50 in class AB:
> 945w  1398w dc  67% eff  453w disp
> 1511w  1888w dc 80% eff 377w disp
>
> 2m-1200w PA using a MRFE6VP61K25H in class AB:
> 566w  1200w dc 47% eff 634w disp
> 1133w 1542w dc 73% eff 409w disp
>
> less heat dissipated when running full power RF ouput.
> Both are W6PQL amps.
>
> 73, Ed - KL7UW
>   http://www.kl7uw.com
> Dubus-NA Business mail:
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-- 
Scott  K9MA

k9ma at sdellington.us