Just a thought: I'm not quite sure of your arrangement, but if the analyser is not grounded it will pick up common mode current and distort the readings; hand holding is also affected. This has confused me a lot in the past. Now I use a clip and tent stake in the ground and that stabilises the readings and gives more consistency. I lay the analyser on the ground. 73 de David G3UNA-G6CP
> On 20 August 2018 at 06:08 Gary Smith <[email protected]> wrote: > > > Tom, > > Yeah, I'm resigned to doing something like > that. I just put up a new antenna today, > 129' and it's still showing resonance at > 1.725, that's way too low. I need to > re-measure the old antenna's length, I put > it up last summer. I do have a few ugly > vacuum variables around here and should > see if I can match with one of them > between the radial plate & feed point. > > Enjoy your visit, I love visiting the UK. > > 73, > > Gary > KA1J > > > > Gary KA1J, > > It struck me that maybe you originally cut your sloper a little longer > > so you could match it with a simple capacitor. My inverted L is > > resonant on its own, somewhere down in the 1.750 region. It´s > > effectively matched to 50 ohms by an L network but the series > > inductance part of the network is made by lengthening the antenna a > > little. I have a parallel high voltage ceramic capacitor from the feed > > point to radials. I can´t check the actual values because I´m > > currently on vacation in W4 land. 73, Tom G3OLB > > > > > > > > Sent from my iPhone > > _________________ > > Topband Reflector Archives - http://www.contesting.com/_topband > > > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband
