thanks for the suggestion John. I tried it but it didn't allow calibration to occur. However I noticed that after the ATU tuned the 50 ohm load the rig showed high SWR (4.1:1 or so) when I manually keyed it. Also on the bands the power output it good, the Current drawn is shown as 2.3 Amps, which would be pretty spectacular. I did confirm the ~100W output power on a W2 wattmeter.
So something is definitely up Mark n2qt -----Original Message----- From: Dr John Farmer Sent: Saturday, September 22, 2012 2:01 PM To: Mark n2qt Subject: Re: [Elecraft] K3 power output problems Hi Mark, Just read your posting. I had some quirky things happen with my K3 with the tuner in Bypass mode. I needed to "set" the bypass LC settings in the tuner to remedy them. Try the following: Switch back to ANT 1. Attach 50 ohm dummy load to ANT 1. Engage the ATU Tune the ATU in to the dummy load on every band sequentially from 160 to 6m Put ATU back into bypass mode and then retry the tx gain calibration routine. Hope that helps. 73 John VK7JB Sent from my iPhone On 23/09/2012, at 3:44, "Mark n2qt" <n...@verizon.net> wrote: > On a new to me K3, I am having problems with power output below 15M. For > example > the power output on 80 maxed out at 30 watts. (good swr etc., no alarms, > voltage input > is good etc.). > > So figured it was a TX gain issue so set up recalibrate it. The 5 W > calibration goes fine > on 160, but fails on 80 with the following dialog > > Starting 5 watt calibration > Calibrating at 1.900 MHz > Calibrating at 3.750 MHz > SWR 3.7-1 is too high for calibration > Verify that a dummy load is attached to "AN2;" > > (and yes the dummy load was connected to AN2, I had previously tried it > on > AN1 with the > same results.) > > If I then transmit manually, the SWR indicated is 1:1 and I can adjust > power > up to the same > 30W indicated previously. > > So, the TX calibrate complains of high SWR, but manually cannot replicate > it. > > Any ideas (really, really) welcome. > > Unit does have the AntTuner which is set to bypass (and it looks like the > calibrate routine also > does this.) > > Mark n2qt > > > ______________________________________________________________ > 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 ______________________________________________________________ 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
