I did look at the K3 output, and it's much, much better than the KPA1500 output. I also checked that the KPA1500 supply voltage was not dropping much: 53 V in standby, 52 V at 1500 W.
73, Scott K9MA ---------- Scott Ellington --- via iPad > On Jun 9, 2018, at 7:26 PM, Wes Stewart <wes_n...@triconet.org> wrote: > > I don't have a KPA1500 or enough power attenuators to test my KPA500, but I > have spent many dozens of hours looking at TX IMD on my two K3s. > > I will simply say, if you haven't already, check the IMD of the bare K3 > before blaming the KPA1500. Garbage in, garbage out. That of course doesn't > pardon the KPA for dropping gain. > > Wes N7WS > > >> On 6/9/2018 2:21 PM, K9MA wrote: >> I recently ran a two-tone test and measured CW power gain. (SN1078) It >> doesn't look good. The two-tone waveform shows distinct "flat-topping", and >> the power gain drops 25 percent from 1000 to 1500 Watts. My old 3-500Z >> amplifier is much better. Has anyone measured IMD or linearity, or seen any >> test results? >> >> While I'm primarily a CW operator, I'd be very reluctant to use the >> amplifier on SSB. >> >> 73, >> >> Scott K9MA >> > > ______________________________________________________________ > 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 ______________________________________________________________ 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
