Re: [Elecraft] KX3 SWR change during a SOTA
Hi Mike, Thinking of N6BT Tom Schiller's famous LBOTA demonstrations at Pacificon and elsewhere (Light Bulbs on the Air), I wonder if any one has a documented a case of HOTA (Ham on the Air): Someone with no antenna other than themselves. Maybe connect one side of the antenna to a stake in the ground and the other side to your belt buckle. Like Rudolf the RF-nosed reindeer. Oliver W6ODJ On 6 Jan. 2013, at 11:02 AM, Mike Herr wa6...@gmail.com wrote: On a SOTA in Death Valley I noticed something strange. Using a buddistick, I would touch up the SWR using the KX3 internal tuner. 1:1, ok, now transmit. The SWR would jump up. It would take a couple of cycles to get it to calm down again. Now thinking about it, When I first pressed the ATU tune, I was not holding the rig, it was sitting on the ground. When I started using the rig I had the head phones on and the paddle on my leg or the mic in my hand. Likely those two things were affecting my ground Anyone else see this? Now I need to go back out and experiment with it.;) -- Mike Herr WA6ARA DM-15dp Home of The QRP Ranch __ 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
Re: [Elecraft] KX3 SWR change during a SOTA
Mike, Do you have a good return path for the RF from the antenna? If not, then yes, your body and its coupling to earth will have an effect on the tuning that will vary with power level. A good counterpoise should cure it. If that is not your problem source, then look for a connection problem in your antenna system - a loose connector can cause that behavior - OK at low power but not good when the power increases. 73, Don W3FPR On 12/6/2013 2:02 PM, Mike Herr wrote: On a SOTA in Death Valley I noticed something strange. Using a buddistick, I would touch up the SWR using the KX3 internal tuner. 1:1, ok, now transmit. The SWR would jump up. It would take a couple of cycles to get it to calm down again. Now thinking about it, When I first pressed the ATU tune, I was not holding the rig, it was sitting on the ground. When I started using the rig I had the head phones on and the paddle on my leg or the mic in my hand. Likely those two things were affecting my ground Anyone else see this? Now I need to go back out and experiment with it.;) __ 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
