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| To: | <[email protected]> |
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| Subject: | Re: LF: Fenceline longwire |
| From: | "Alan Melia" <[email protected]> |
| Date: | Tue, 22 Jan 2008 14:17:16 -0000 |
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Hi Rik isn't it more likely to be the case that these low antennas are much more dependent on ground conditions, which are not modelled very well (or at all) in any of the simulators. In many cases the main reason they reject the "interference" for higher frequencies is the relatively deeper skin depth at LF/MF ?? This is good enough reason to follow JB and try it (if you have the facility of "open range" available!!) but I guess they would work so well over salt marshes !! Alan G3NYK ----- Original Message ----- From: "Rik Strobbe" <[email protected]> To: <[email protected]> Sent: Tuesday, January 22, 2008 1:58 PM Subject: Re: LF: Fenceline longwire > J.B. , > > I simulated the fence wire with MMANA. > On HF (80m, 40m) I got the expected (bi)directivity and low offset angle. > But on 500kHz the horizontal pattern is almost omnidirectional and > the offset angle is 78 degrees. > It seems that (at least in theory) even 1200 foot is too short to be > long on 500kHz ... > Or does MMANA not work properly ? > > 73, Rik ON7YD |
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