Re: [Elecraft] KPA500 on AM...
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 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: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 k...@sdellington.us > > > -- > Scott K9MA > > k...@sdellington.us > > __ > 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 ghyoung...@gmail.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
Re: [Elecraft] KPA500 on AM...
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: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 k...@sdellington.us -- Scott K9MA k...@sdellington.us __ 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
Re: [Elecraft] KPA500 on AM...
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: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
[Elecraft] KPA500 on AM...
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: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
Re: [Elecraft] KPA500 on AM?
Run it at 125 watts carrier out, and 500 watts PEP, it's just another signal to amplify. 73, Guy. On Fri, Aug 17, 2012 at 11:00 PM, Ralph Parker ve...@dccnet.com wrote: I don't 'do' any digital modes, but I understand that the KPA500 can run pretty much full-tilt-boogie on RTTY. Anyone tried it on AM? Might be nice with a Ranger. I've gotta do something until I get that 813 amp built, and the KPA500 is just sitting there on the shelf... Ralph, VE7XF __ 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 __ 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
[Elecraft] KPA500 on AM?
I don't 'do' any digital modes, but I understand that the KPA500 can run pretty much full-tilt-boogie on RTTY. Anyone tried it on AM? Might be nice with a Ranger. I've gotta do something until I get that 813 amp built, and the KPA500 is just sitting there on the shelf... Ralph, VE7XF __ 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
