RadioBanter - View Single Post

January 24th 06, 08:52 PM posted to rec.radio.amateur.antenna

wrote:

It's not a fair comparison
since the vertical was given a 2x height advantage. (That's
like putting my three foot six inch grandson up against
Shaquelle O'Neal in basketball. :-) Put the dipole at 70
feet, like the vertical was, and see what happens.

I mounted both as high as they would go. I don't consider
the GP as having quite twice the height advantage due to
the current distribution.

The top of my vertical was at 53 ft. and my dipole was
one of its upper guy wires at about 50 feet so the two
heights were essentially opposite yours.

No , just different..

Which brings up another question. If the top of a vertical
is at a certain height, what height of dipole would be a fair
comparison?
Dunno...But max current on the GP as at the base..

There's no "fair" comparison between two such different antennas, if
your goal is some sort of generalized conclusion about which kind of
antenna is "better". The only valid comparison would be a vertical at
whatever height you can put it at vs a dipole at whatever height you can
put it at. Then, with your particular ground conditions and azimuth and
elevation angles of interest, you can decide which is better. Any
general binary conclusion about whether a vertical or dipole is "better"
is nonsense, so there's no point in making rules for comparing them.

Roy Lewallen, W7EL