Yes, turning the drive up a bit restores the output to 1500 W. I haven't recorded it, but drive seems fairly flat band to band. (The K3, of course, saves the drive levels for each band.)
73, Scott K9MA ---------- Scott Ellington --- via iPad > On May 31, 2018, at 10:16 AM, Paul Baldock <[email protected]> wrote: > > Can you safely increase the drive to get it back to 1500W? > > Another question: Is the drive requirement (amp gain) pretty flat from band > to band? > > - Paul KW7Y > > At 08:10 AM 5/31/2018, Bill Stravinsky via Elecraft wrote: >> Yup, as the temp climbs the output drops some. Even though I'm glad I got >> the solid state amp I still prefer tubes, hi. The drop is anywhere between >> 100 to maybe 300 watts.I never really noted the exact numbers. BillK3WJV >> p.s. I'm thinking its a normal solid state thing. On Wednesday, May 30, >> 2018, 4:23:47 PM EDT, K9MA <[email protected]> wrote: I'm using the K3 >> with the Elecraft interface cable. I've noticed the the CW drive power >> required by mine varies considerably, both with temperature and SWR. If I >> set the K3 output for a KPA1500 output of 1500 W output initially, the >> output will drop to perhaps 1100 W when the temperature stabilizes at around >> 65 C. (I've ruled out any change in antenna impedance, etc.) A similar >> change occurs if the SWR goes from 1:1 to 1.2:1 when changing frequency or >> switching antennas. I haven't changed the ALC from the default setting. >> Has anyone else noticed this? 73, Scott K9MA -- 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] > ______________________________________________________________ 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]
