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In Reply to: I read that you do have a rotator, whoops!? posted by Timbo in Oz on November 8, 2006 at 21:34:55:
Yep, all horizontal tests done on rotator. Verticals, of course, don't need it, they're omni in the horizontal plane. It's always kind of puzzled me why people buy these ST-2 and other expensive vertical whips when a vertical twin lead half wave will do as well, at a small fraction of the cost. So far as the FM-6 is concerned, I have a message in to Antennacraft, haven't gotten a reply yet.
I have noticed that not only it, but also the simple dipole and the twin lead dipole when horizontal, all find one or two stations which although coming in with reasonable signal strength, have either a lot of distortion, or no audio at all, whereas the vertical twin lead dipole gets them all without those problems. The simple answer is that multipath reception is practically nil with the vertical antenna, and even the FM-6 is not able to find a good pointing for multipath rejection.
The FM6 does have a deep null at the sides, and a marked front-to-back ratio as expected, but just doesn't have the kind of forward gain I hoped for vs the twin-lead dipole, whether vertical or horizontal. Should average 6dB, but only gets up about 1-2 dB at most. I'll try to find and look over the reference you supplied, I don't have much antenna smarts, just know how to set one up and measure it's performance. Thanks for the comments.
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Follow Ups
- Re: I read that you do have a rotator, whoops!? - DAMeyn 17:47:25 11/10/06 (6)
- Try running the FM6 vertical. It seems to me that local conditions are telling you something - Timbo in Oz 22:33:17 11/10/06 (5)
- Re: Try running the FM6 vertical. It seems to me that local conditions are telling you something - DAMeyn 11:35:17 11/11/06 (4)
- wahy CAN"T you mount it outside there AREways to fight local rules you know. - Timbo in Oz 17:09:53 11/11/06 (3)
- Re: wahy CAN"T you mount it outside there AREways to fight local rules you know. - DAMeyn 17:39:21 11/16/06 (2)
- "Although the FM-6 doesn't deliver higher signal strength than the vertical folded dipole, its signal results in better" - Timbo in Oz 18:22:58 11/16/06 (0)
- Hokay but DO read this post - Timbo in Oz 17:49:26 11/16/06 (0)