40m Rotary Dipole Or vertical

[ON7TZ]

Hi All

I'am Dave and i have now a inverted V dipole at 60 feet hi. I have two options

1. Rotary dipole at 72 feet high
2. 1/4 Vertical with radials (30 pieces for beginning)

All Info is welcome

Dave ON7TZ

[EI4GMB]

I would keep what you have. Not much gained by a 12 feet higher dipole. Verticals suck without lots of radials and the strongest radiation from a ground mounted vertical is at 4 inches above ground, Rotary dipoles are good if only one center support is available but these dipoles also have much greater wind resistance than wire dipoles and they come down easier in wind storms. Other than these issues, do what you like since all antennas installed correctly should work well.

I agree.

Kind Regards

Fred EI4GMB

[W0SGM]

1/4 wave vert. with radials, works pretty well for DX. I've worked quite a bit of DX on a S9v 31'

Keep the inv V and install a 1/4 vert with as many radials as you can,length doesn't matter as much as quantity

[EI4GMB]

I've worked quite a bit of DX on a S9v 31'

When used with a proper ground system the S9v 31' is certainly a serious DX antenna!

73

Fred EI4GMB

[NA0AA]

Dunno, with a rotary dipole at 72' you could certainly rotate it to null out interference, that might be a point in it's favor.

[K1DNR]

It depends on the environment. But, an inverted V by design has some interference from it's supporting structure, not to mention a compromise in the pattern.

A rotatable dipole at that height on 40m would kick butt.

You will also get a bit of ability to peak and null a few db off the sides/front/back

[G0GQK]

Knowing that Belgium is flat, that dipole at 72 feet could be the highest point in Belgium ! Only kidding ! As for the nulling out of interference, it would need something like a Faraday cage in Europe.

[K1DNR]

Knowing that Belgium is flat, that dipole at 72 feet could be the highest point in Belgium ! Only kidding ! As for the nulling out of interference, it would need something like a Faraday cage in Europe.

A dipole at that height should have a 6db null off the the ends. That's one "standard" S-unit. Nothing to sneeze at really. The other way of thinking of it is halving those signals twice...

[ON7TZ]

So a vertical 1/4 wave will works better then?
Otherwise I keep my inverted V antenna works also VK,ZL,JA,4S ETC africa, south america ,north america even west-coast so if the vertical will work not better the i keep
my inverted v i think

DAVE

[EI4GMB]

Hi Dave,

If my inverted V antenna worked VK,ZL,JA,4S,Africa, South America, North America and the west coast I would keep it! I don't think a 1/4 wave vertical is going to do much better. Hope this helps. Best of luck.

Kind Regards

Fred EI4GMB