Don and all,
The KXPA100 is working fine now, well within specs. You were right again; the system was way out of calibration. All told, there were two problems: the calibration and the RJ-45 connectors in the control cable. I also replaced the 22A switching power supply with a big old 35A linear supply that just loafs at the 14.5A current drain from the KXPA100. Many thanks to all on the Elecraft reflector. 73 Ray W2RS To: rsoifer1 <[email protected]: elecraft <[email protected]> Sent: Mon, Jan 2, 2017 11:49 am Subject: Re: [Elecraft] KXPA100 with PX3 Ray, Did you do the basic KX3 Power Calibration as well as the Power Calibration with the KXPA100? See Appendix B of the KXPA100 manual. The external wattmeter has nothing to do with it, the power is measured internally by the KX3 and KXPA100 circuits. You will need a good 50 ohm dummy load that is flat through 6 meters. 73, Don W3FPR On 1/2/2017 12:42 PM, [email protected] wrote: > Hi Don, > > I tried that but an external wattmeter confirmed the KXPA100 forward > and reflected power readings. Something in the KX3 is holding down > the power output when PA is ON, but not when PA is off. > > 73 Ray W2RS > > > -----Original Message----- > From: Don Wilhelm <[email protected]> > To: rsoifer1 <[email protected]> > Cc: elecraft <[email protected]> > Sent: Mon, Jan 2, 2017 10:33 am > Subject: Re: [Elecraft] KXPA100 with PX3 > > Ray, > > Have you tried running the TX Gain Calibration on the KX3? > It may be that the KX3 wattmeter is not well calibrated. > > If you do the TX Gain Calibration manually, it must be done on each band. > The KX3 Utility automates the process. > > 73, > Don W3FPR > > On 1/2/2017 11:55 AM, [email protected] <mailto:[email protected]> wrote: > > Don and others, > > > > The good news is that you were right: the RJ-45 connectors in the > > control cable were not making good contact. I fixed that and PA ON > > operation of the KXPA100 is now working. > > > > The bad news, however, is that in Basic operation with PA OFF, the > > KX3/KXPA100 puts out full power, but the most I can get out of it with > > PA ON is 50-60 watts. The attenuator is set for OUT/AUTO and there is > > no more than 1 or 2 watts reflected power. > > > > > ______________________________________________________________ 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]
