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 -- View this message in context: http://elecraft.365791.n2.nabble.com/The-1500-watt-amp-tp7620915p7621008.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
