The gain compression I measured, between 1000 and 1500 W on 40 meters, was 1.4 dB. I used the K3 and KPA1500 power meters. Factory calibration of the KPA1500.
Scott K9MA ---------- Scott Ellington --- via iPad > On Jun 14, 2018, at 2:51 PM, Paul Baldock <[email protected]> wrote: > > What you report of compression near the maximum power is certainly true of > the amplifiers like the SPE-1.5K that use a single device, but I would have > thought this would not be true of the KPA1500 that uses 2 devices. This is > the reason I returned my SPE and ordered the KPA. Hopefully the compression > is less than 1dB. > > Has anybody else measured it? > > - Paul - KW7Y > > > > At 02:21 PM 6/9/2018, you 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 -- 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]
