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#1
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Antenna Stacking : HF / 2M / Dipole / Directional HDTV Antenna
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 |
#2
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Antenna Stacking : HF / 2M / Dipole / Directional HDTV Antenna
Glenn Jensen wrote:
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? 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 |
#3
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Antenna Stacking : HF / 2M / Dipole / Directional HDTV Antenna
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" 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 |
#4
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Antenna Stacking : HF / 2M / Dipole / Directional HDTV Antenna
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 |
#5
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Antenna Stacking : HF / 2M / Dipole / Directional HDTV Antenna
"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 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/ima...%20on%20tower/ |
#6
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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 |
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