Hello John, Here I use a 40m dipole at 70 ft fed with open wire line and a homebrewed remote antenna tuner as a reference antenna system, and I have not seen any sign of the problems that you have described when using my K2 barefoot, nor with the KPA100 in line, on any of the HF bands. But I should add that this tuner requires less than 1 watt to adjust itself.
To confirm or otherwise that a reactive load is the cause of your problem, I suggest that a useful test would be to TUNE using a dummy load ( 50 +j0 ohms) with a suitable value of capacitance in shunt right at the dummy load. The voltage rating of the capacitor must be adequate of course, but an open ended stub of coax whose length is roughly between 1/8 to 1/4 wavelength X coax's velocity factor at the test frequency could be used in lieu of a discrete capacitor. With regard to a permanent frequency counter connection, based on a lot of work that I did to remove my K2/100's receiver "birdie" problem I would not do this. However our operating habits might differ, birdies drive me daft :-) If I do not reply immediately to any further thoghts you might have, please bear with me because I will away - as I have been for some time. 73, Geoff GM4ESD John, on Saturday, October 16, 2010 at 13:28 + 0100 you wrote: > Hello Group, > > K2 #6998 is now singing. The calibration and alignment went very smoothly. > I > feel very pleased with myself :) I've built the KSB2, KDSP2 and KNB2 to > go into > this rig, but it's currently still a base K2 while I learn to drive it. > > I have noticed something odd about the power while tuning using an > external > autotuner and I'm wondering if it this is normal: <snip> > It's seems as if the reactive load presented to the K2 prior to the tuning > cycle > is causing the K2 to ramp up the power out and current draw and the K2 > stays in > this high output state until TUNE mode is interrupted. > > Hope this makes sense. > > So can anyone tell me if this is expected behaviour when using an external > autotuner with the K2? The fact that all works as expected into a dummy > load > makes me think the problem's not with the rig. > And a second question - is it OK to leave the frequency counter > permanently > connected inside the rig to TP2 so you can adjust the BFO/Filter settings > on the > fly? ______________________________________________________________ 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
