[TowerTalk] 160M Inverted Vee
Bill G. K3SV
k3sv at hughes.net
Thu Jun 22 12:06:44 EDT 2006
From personal experience last season.
I put up a full size 160 inverted V, 60 feet up and the ends about 10
feet off the ground. Also have a shunt fed tower. These antennas are
separated by about 300 feet. At sunset and sunrise, hands down, the
inverted V heard stations better than anything I tried, EU was sometimes
S9 + at sunset from Southcentral PA. If you listened long enough to the
signals, the inverted V would fade into the "sunset" and the beverages
would start to improve. A similar scenario happens around sunrise. After
reading Bill's comments, all makes sense to me!
73 Bill K3SV
Bill Tippett wrote:
> >If your dipole seems good compared to a vertical on 160m, it
> is more likely because the vertical is poor than because the
> dipole is good.
> Not necessarily. It simply means
> propagation is high-angle instead of low-angle:
> 1. For angles <<40 degrees, my 3-el vertical
> array is best.
> 2. For angles ~40 degrees, there is little
> difference between the two.
> 3. For angles >>40 degrees, the inverted-V
> (or low dipole) is best.
> 4. 95-99% of propagation on 160 is low-angle,
> but high-angle sometimes exists around sunset,
> sunrise and in disturbed geomagnetic conditions.
> A high-angle antenna is also better for local
> work (<300 miles) at night.
> 5. When high-angle propagation predominates,
> Beverages do not work well, but an inverted-V
> will work well both for RX and TX. I have
> seen differences of +10 dB for my inverted-V
> in such conditions, including long-haul DX
> such as YB from Colorado or VQ9 from NC.
> 6. If I had to pick **one** antenna on 160,
> it would be a vertical. However, if you want
> to cover the 1-5% case when high angles are
> predominant, an inverted-V or dipole is a
> good complement to a vertical/Beverages.
> I have DXCC 319 on 160 and have done
> reasonably well in 160 contests. I would not
> want to be without my inverted-V as a complement
> to my vertical array, but would always choose
> the latter if I could have only one antenna.
> 73, Bill W4ZV
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