Thanks, Jack! Now the only question is, is the KPA500 a great amp, or the greatest amp ever? I'm in the second camp.
73.5 Eric WD6DBM On Wed, Jul 8, 2020, 1:16 PM Jack Brindle <[email protected]> wrote: > I can confirm that KPA500 V1.00 firmware, which was the first released, > had a max temperature of 90 degrees C. This has not been changed in any > subsequent code. > > As for the input power, the amplifier has improved over time. My original > prototype KPA500 requires power in the range described (about 35 - 40 > watts), while my new one (just over a year old) needs about 20 or so watts. > Both are great amps! > > 73! > Jack, W6FB > > > > On Jul 8, 2020, at 1:00 PM, William Hammond via Elecraft < > [email protected]> wrote: > > > > Hi Eric, My manual (revision B, 2011) that came with my SN 0149 says 90C > maximum, page14 in the specifications. It also says drive power 30-40 > watts for 500 out and I have never beed even close to that, usually 22-26 > watts drive. > > > > FYI, > > Bill-AK5X > > > >> On Jul 8, 2020, at 6:00 AM, Eric Norris <[email protected]> > wrote: > >> > >> I just read in the current KPA500 Manual that max heat sink temp is 90C. > >> Is this true for my first-year production KPA500? I seem to remember > >> somethink like 75C. I cant find my old manual. > >> > >> 73 Eric WD6DBM > >> ______________________________________________________________ > >> 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] > > ______________________________________________________________ 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]
