Hi Sholto. I suspect you are correct because this afternoon SWR on 20M is fine and is is high again on 30M. Too much of a gale for me to venture out at the moment Andy K3UK On Sat, May 8, 2010 at 1:19 PM, sholtofish <[email protected]> wrote:
> > > As it's unlikely you've changed the laws of nature it's probably your coax. > Put a 50 ohm dummy load on one end and connect your analyzer (or even your > rig) to the other and do a sweep of frequencies. I remember once having a > cable that must have had water ingress that caused all manner of swr > problems that seemed to change on a daily basis. > > 73 > > Sholto > > > --- In [email protected] <digitalradio%40yahoogroups.com>, Andy > obrien <k3uka...@...> wrote: > > > > Hmm. My homemade 20M Ground Plane antenna that was nicely resonant on > > 20M now has a 3:1 SWR on 20M but is 1:1 on 30M! Perhaps I should > > patent the design, how to make a resonant 30m vertical out of 17.5 > > feet of aluminium tubing! The other odd thing is that the SWR is only > > around 3:1 on 10M, 12M, and 15M. I would expect it to be much higher > > without tuner. It is not until I get to 40M that I get a very high > > SWR. I'll be going outside to check , when the weather clears. It > > will be interesting to find out what has happened > > > > Andy K3UK > > > > >
