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Help me buy VHF/UHF television antenna? Can't decide!
Sorry about that. I did get them mixed up not having the photos in front of
me when writing. Roy is also correct. All that is in the ARRL Antenna Handbook. I believe impedance is lowered though at the dipole elements apex. to some extent. The dipole vs. Inverted V comes to mind, but the feedpoint impedance of a LPDA is really about the spacing of the feeders and matching system. . I'll shut up now "J. Mc Laughlin" wrote in message .. . I am looking at a 1080. It is being used in the computer room. All of the elements are in two, parallel planes that are each normal to earth. In other words, flat. On high-VHF (channel 12, here) there is little F/B ratio, but that has not been a problem. The chances of needing to reject a high-VHF station (at 180 degrees) on the same frequency is slim. The antenna is a stout, little, two-bay broadside array with reflector mostly effective on UHF. I provided a detailed set of measurements in another message. 73, Mac N8TT -- J. McLaughlin; Michigan, USA Home: wrote in message news "JB" wrote: While the 1080 UHF is fairly sharp with some potential gain, the VHF elements seem to be little more than "rabbit ears" - In fact it is a swept dipole, so will be bi-directional and easily pick up reflections from behind and around you.. I'm a bit confused on your remark above. Looks to me like the 1080 is perfectly flat antenna. Where do you see any bending or sweeping of elements? |
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