Hi from HB9CVQ Andy My K3S / K3 voltage under load (72W) was 13.1V DC.
-----Original Message----- From: [email protected] <[email protected]> On Behalf Of K9MA Sent: Sonntag, 9. Februar 2020 00:01 To: [email protected] Subject: Re: [Elecraft] FW: Testing IMD3 (dB) K3S (#10490) Supply voltage, under load, at the radio? 73, Scott K9MA On 2/8/2020 16:14, Conrad PA5Y wrote: > I have some comments. > > My TX IMD is even worse and I was not very happy with the advice I got from Elecraft. I was advised to use the radio in test mode and use an external amplifier. > > Periodically I have a complain about it. My 10W PA is also poor even after the FW upgrade that allows additional attenuation to the drive. There are a few of us who discuss this off reflector and it is by no means uncommon. > > On a more positive note I must say that the transverter port output is exceptionally good. Its really impressive. > > As for the PA IMD, good luck, you will need it. > > Regards > > Conrad PA5Y > > > > -----Original Message----- > From: [email protected] > <[email protected]> On Behalf Of [email protected] > Sent: 08 February 2020 01:00 > To: [email protected] > Subject: [Elecraft] FW: Testing IMD3 (dB) K3S (#10490) > > > > > > > Subject: Testing IMD3 (dB) K3S (#10490) > > > > Hi > > > > Can anyone roughly confirm IMD3 K3S ? > > > > 10W/100W module recently exchanged under Elecraft swap program Rev A (2019). > > Testing: Using K3S internal 2 Tone and -60dB power attenuator (50Ohms) > , HP 8591E Spectrum Analyzer (Span 10kHz) > > > > 72W (Tune, LP100A)out into 50Ohm: > > IMD3 (#10490) -->about on 160m 34 dB, 80m 32dB, 40m 34 dB, 20m 26dB, > 17m 30 dB, 10m 30dB, 6m 26dB > > Yes, all was aligned (TX Gain test) and showing 100 to 90W full power on all bands. > > The driving signal to 10W PA (one tone) looked better than 50dBc. > > > > I think these IMD3 values are not very impressive. A power amp. would typically further degrade the overall results. > > So K3S is rather good for CW but not really good as SSB preference? (I > have now also a FTDX101MP) > > > > Comparing with K3 (#7848) upgraded myself to "S", but still maintaining the old 10/100W modules. > > 80m and 20m were better by about 6dB!? > > > > The two tones (IMD3 Test Tones) however were in both cases never absolutely identical in amplitude (ca. +/-1dB) on the analyzer. > > > > Any comments? > > > > Tnx, Cu, vy 73 de Andy > > HB9CVQ, DK2VQ, AK4IG > > > > <https://www.qrz.com/db/HB9CVQ> https://www.qrz.com/db/HB9CVQ > > > -- 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]
