Yes. You wouldn’t want to run a KPA500 at any more than around 125W carrier output. Maybe a bit less to give you some headroom. At 250W carrier the KPA500 would be pushed way beyond ratings on AM.
Grant NQ5T > On Jan 23, 2020, at 7:59 PM, K9MA <[email protected]> wrote: > > Isn't peak power for AM 4 times the average (carrier) power? > > 73, > > Scott K9MA > > > On 1/23/2020 18:10, Don Wilhelm wrote: >> John, >> >> The KPA500 is rated for 500 watts PEP. >> With AM, that is 250 watts carrier, and 250 watts of sideband energy (125 >> watts for each sideband). So your "talk power" is 125 watts, compared to >> 500 watts SSB. >> >> Note that is for 10 minutes transmit with a 5 minute receive period. If you >> are "long winded" and want to exceed that 10 minutes keydown, you should >> reduce the power. >> >> See the specifications. If you want to exceed the specification limits, you >> do so at your own peril, although the KPA500 has means to protect itself. >> >> 73, >> Don W3FPR >> >> >> On 1/19/2020 12:43 PM, Macy monkeys wrote: >>> >>> One more question then I'll go back into hibernation. What is considered a >>> safe drive level for the KPA500 when operating AM? I haven't tried it yet >>> but I imagine the cooling fan goes into jet takeoff mode. >>> >>> Thanks, John K7FD >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [email protected] > > > -- > Scott K9MA > > [email protected] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
