Try re-tuning the KAT3 auto tuner, or bypassing it. Try tightening the 3 LPA screws on the bottom (the ones with lock washers). Keith
On 2/9/2012 4:07 PM, Tom Kramer wrote: > I am a new person in this group and I will admit that I have not looked at > many of the hundreds of previous posts so I will apologize in advance for > being a bit lazy if this topic has been dealt with before. > > I have a home assembled K3 SN 4210 that has developed a most annoying > problem. I have exchanged a number of emails with Gary Surrency about this > with basically no conclusion and an apparent lack of desire to solve it. > > I discovered that when attempting to transmit between 24,910.0 and 24,930.0 > the swr bar graph shows a pulsating full scale reading and the dial reads SWR > between 9:1 and 12:1, and power output of maybe 20 watts. Outside this range > SWR is normal and power output is full 100 watts. This can be into a resonant > antenna or dummy load. > I have done the synthesizer calibration preceded of course by the ADC ref > calibration multiple times. I sent Gary a list of all the parameters > outputted by these tests and he says all look to be in the normal range. I > have since discovered that the same problem appears between 28,500 and 29,000 > Khz as well. I am trying to keep this somewhat short so I didn't supply every > detail of the testing. > Have other people experienced this and what if any solution did you find? > Gary suggests a new synthesizer board @ $200+ but no at this point there is > no guarantee that will fix the problem. I have made arrangements to test > this with another K3 next week, but curious if this problem is something new. > Tom NQ7R > Casa Grande, AZ > > ______________________________________________________________ > 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
