Now I seem to have a real problem. I did a TX Gain calibration using the K3 Utility for both 5 and 50 watts. I worked perfectly and tx gain appeared to be right on all bands. I then did some testing into a dummy load with RTTY. I noticed that power would start out at 25 watts and it would take several transmissions to get it up to 70 to 100 watts. So I decided to do a wattmeter calibration. I had selected WMTR LP and was attempting to do the 5.0 W calibration into a dummy load. But I could not get the output power to change much and after several tries I got a high current reading. Now I can get audio only out of the left side of headphones and when I attempt to reselect the WTMR parameter it is no longer there. The selection in Config skips from VFO OFS to XVn ON. I assume I have blown something out. However, I am considering reverting back to MCU version 4.14. Any other suggestions?
Thanks in advance. I would hate to see the K3 go down right before the SS CW weekend. Dave, N4QS ----- Original Message ----- From: "Dave Perry N4QS" <[email protected]> To: "Nate Bargmann" <[email protected]>; <[email protected]> Sent: Thursday, November 04, 2010 7:34 PM Subject: Re: [Elecraft] K3 MCU 4.17 (APF beta) kills SSB output? >I am seeing the same reduction in SSB output power. I installed 4.17 Beta > last night. It appears that the reduced power only occurs when I have APF > activated. I have twice restored SSB power by doing the following: 1). > Changing mode back to CW, 2). Going to Dual PB in Config menu and turning > APF off, 3). exiting Config menu, 4). changing mode back to SSB. Power is > restored back to a full 100 watts. With APF set to on, SSB power is > reduced > to about 70 watts. I confirmed this on 17M by repeating the process > twice, > and I then tried 20 M SSB and the power was back to 70 watts (after I had > turned APF back on.) Is this a problem with the beta release? I saw > Wayne's suggestion to do a TX gain calibration, but it seems strange that > I > would only need to do this after installing Beta 4.17. > > APF works great, but I need to resolve this SSB power issue. I may try > RTTY > next to see what happens in that mode. > > Dave, N4QS > > > ----- Original Message ----- > From: "Nate Bargmann" <[email protected]> > To: <[email protected]> > Sent: Thursday, November 04, 2010 6:30 PM > Subject: Re: [Elecraft] K3 MCU 4.17 (APF beta) kills SSB output? > > >>* On 2010 04 Nov 18:23 -0500, Dave, W8OV wrote: >>> I had no loss of SSB power output after the 4.17 Beta install. The APF >>> works wonderfully, with only a hint of ringing to my ears. Really nice >>> addition to the K3. >> >> At least some of you aren't seeing this. :-) >> >> James Rogers suggested turning the Mic gain to 0 and then back up and he >> was getting good output. After I did that, I could only get about 25 >> Watts peak on both meters. I switched to CW mode, transmitted a short >> carrier which showed 100 Watts on both meters (power control set to >> 100). Switching back to SSB both meters showed about 70 Watts. I have >> since bumped TXG VCE up to the max, 3.0 dB and am getting about 90 Watts >> peak on each meter (I say fourrrrr in a normal voice to get the K3's >> meter to stabilize for a bit). I had previously had TXG VCE set to 1.0 >> dB. >> >> I'm not sure that rolling back to the last stable firmware would solve >> this or be fraught with other issues. Generally, roll-backs don't work >> all that well in other devices. >> >> 73, de Nate >> >> >> -- >> >> "The optimist proclaims that we live in the best of all >> possible worlds. The pessimist fears this is true." >> >> Ham radio, Linux, bikes, and more: http://n0nb.us/index.html >> ______________________________________________________________ >> 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 >> > > ______________________________________________________________ > 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 > ______________________________________________________________ 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
