Antenna Stacking : HF / 2M / Dipole / Directional HDTV Antenna

[Glenn Jensen]

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

[Jim, K7JEB]

I think the usual practice is to put the VHF/UHF antennas
on top of the HF beam so that they don't have to "look through"
that larger metal structure and perhaps have their patterns
disrupted by it. Also, I see problems rotating the 40/80/160
dipole ;-)

Jim, K7JEB

[Glenn Jensen]

Sorry, wasnt too specific in my original post....dipole not stacked, just
attached to the tower....main concern is if there is any interferece etc.
between the HDTV antenna and the Ham Antennas?

Glenn

"Glenn Jensen" <ve6...@hotmail.com> wrote in message
news:1bWdncYU68WeY5LVnZ2dnUVZ_hCdnZ2d@sasktel...

[lt...@yahoo.com]

Glenn,
There shouldn't be any more (or less) interference between the HDTV
antenna and the others than there would be for a 'regular' TV
antenna. As with either type of TV antenna, distance from things
around them will directly affect how much they may be affected by the
'other' antennas simply being there. That says nothing about whether
the ham antennas are in use at the time! (Kind'a figured that anyway,
huh?)
- 'Doc

[Ralph Mowery]

"Glenn Jensen" <ve6...@hotmail.com> wrote in message
news:1bWdncYU68WeY5LVnZ2dnUVZ_hCdnZ2d@sasktel...

Outside of wanting to point the ham antenna in one direction and the HDTV at
another I doubt you will have any noticable problems. Maybe the ham rig
getting into the TV set is all.

I have a 60 foot tower with a 432, 144,50 mhz and then a triband on a
single mast. The mast is about 20 feet long and 6 feet is in the tower .
The antennas are about 5 feet apart.

At the 45 foot level there is an off center fed antenna I use for 80 and 40
meters.

I don't seem to have any porblems with that setup. YOu just put up what you
can with what you have to work with and see what hapens. Here is a web site
with some pix of the tower.
http://home.earthlink.net/~ku4pt/images/Beams%20on%20tower/

[Karl Beckman]

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" <ve6...@hotmail.com> wrote in message
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