RadioBanter - View Single Post - E/M radiation from a short vertical aerial

Spike[_3_] · March 9th 15, 09:12 AM posted to rec.radio.amateur.antenna

On 08/03/15 20:06, wrote:
On Sunday, March 8, 2015 at 3:40:21 AM UTC-5, Spike wrote:

That's true, which is a shame as useful ground-wave/surface wave can be
had on 28 MHz; a maximum range figure for a path over ground of average
conductivity might be 25 miles, and considerably more if the path is
over water (especially sea-water).

That's space wave on 10m.

Not in the UK! Even the flatlands of Norfolk and Lincolnshire have
enough surface topography to make space-wave unlikely.

I used to work local 10m all the time back in the 80's, early 90's..
25 miles is fairly easy with any decent antenna, at a decent height
above ground. I used to work a good bit farther than that fairly often,
when using an antenna at 35-45 feet up.

The ground is good here, and the ground plane was full size at 36 ft
at the base of the antenna. But it may well have been an enhanced space
wave. I was often working well over 100 miles away in such a case.

I'd go for space-wave with refraction or tropo ducting, for these sorts
of ranges.

Well, not everyone does. I know many on 160m who favor verticals.
Not only for ground wave, but better DX.

Not in the UK... We have a progressive licensing system here, in which
most people never progress at all. The level they qualify at is more
concerned with how to fit mains plugs - something that isn't required
here as moulded plugs have been compulsory for 20 years. These people
tend to buy the one aerial they've heard of, the G5RV.

The ground wave is pretty good on 160m if using a vertical.
Nearly as good as on the MW AM broadcast band, being the two bands
are right next door to each other, so to speak.

I'm a big fan of 160m ground wave/surface wave.

--
Spike

"Hard cases, it has frequently been observed, are apt to introduce bad
law". Judge Rolfe