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Old April 25th 08, 02:51 PM posted to rec.radio.amateur.antenna
Karl Beckman Karl Beckman is offline
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First recorded activity by RadioBanter: Nov 2007
Posts: 5
Default Antenna Stacking : HF / 2M / Dipole / Directional HDTV Antenna

Your proposal looks upside down to me. The HF beam is normally the largest
weight and windload, and would normally go at the bottom of the mast,
closest to the rotor. However, you've also listed a rotatable 40/80/160
dipole which must be a huge mechanical monster. If that's accurate, it
definitely goes at the bottom of the mast, then the HF beam above,
vertically separated by not less than 1/4 wavelength.

The mast needs to be at least 20 feet tall (if the beam starts on 20M), in
order to mount the HF beam 16 feet above the rotatable dipole, and then have
the 2M beam 20" above the HF beam.

If possible, keep the directional TV antenna far away from all of the above,
using a separate support mast and rotor. It's doubtful that your XYL will
always want to watch TV stations located in the same general direction that
you are working DX. Also, a strong local 2M signal from your beam will
probably cause noticeable interference to DTV signals in the VHF Hi TV band
(channels 7-13).

Karl WA8NVW


"Glenn Jensen" wrote in message
news:1bWdncYU68WeY5LVnZ2dnUVZ_hCdnZ2d@sasktel...
Am putting up a tower, 60', and was wondering if there is any issues with
the following arrangement:

On top and working down to the tower top section...

1) HF Beam Antenna, then
2) 2 Meter Beam Antenna, then
3) Dipole for 40, 80, 160 M, then
4) Directional HDTV antenna, all on the mast, all turned via rotor.

Any problems with this arrangement?

Glenn