[Elecraft] The 1500 watt amp

[Ignacy]

Perhaps with slight modifications KPA500 can become KPA1000 or even KPA1300
at a lower weight. Replace MRF151 with the Microsemi device and replace a
toroidal PS with a switching power supply. Perhaps adjust firmware so that
the amp works near saturation on CW for increased efficiency and perhaps the
same heat dissipation as KPA500. 

Current standard bearer for amps is SPE 1.3k. 20lb , antenna tuner, 4
antenna switch plus automatic 110/220V switching. At a campsite with AC
available, this is an extension for KX3 that suddenly makes KX3 competitive
even with moderate antennas. From 5 lb to 25 lb and 100 times stronger. 

1.3 k is not perfect. It is loud, may have some hash (2k-fa does), its CAT
is limited, and relays click.  

Ignacy, NO9E



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