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little use. If you must tempt the radiation pattern fates, use the space for a VHF antenna. Jim > With the advent of decent weather I'm working on getting my C4SXL up in > the air. However, I would also like to have a non-directional antenna > which would mostly be used for listening (including while I'm > transmitting). I was thinking of putting an R5 on the garage roof but > don't like the location as neighbour's power and tel lines would be only > a few feet away. (I will probably transmit on it from time to time.) > Then it occurred to me that I could mount it to the chunk of mast > sticking out above the C4. > > The advantages I see are: > 1. The base of the R5 would be at about 50 ft instead of 15. > 2. The R5 would be totally in the clear > 3. The R5 would be in the (perhaps incorrectly assumed) vertical null of > the C4 and would pick up less energy from the C4 there than anywhere > else on my small city lot. > 5. The vertical polarization would also result in less pick up from the C4. > > 5 and 6 together should make looking for mults or simply monitoring other > bands on a 2nd Rx easier than with any other simple arrangement that I > can think of. > > Disadvantages? > > 1. The only one I can think of, and don't know if it is real, is the > possibility of one antenna detuning the other. > > I just started the EZNEC tutorial in hopes that, at some point, I could > model this arrangement. However, I would like to actually have it up > before winter comes! > > My questions > > 1. Does anyone have models of the R5 and/or the C4SXL which they would > be willing to share with me? > > 2. Do you have any comments on the validity of this proposal? If so, I > sure would like to hear them. > > 73 de Jim Smith VE7FO > > > > -------------------------------------------- > Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. > Force12 Web Site: http://www.force12inc.com > > To Submit Message to the List: Force12Talk@qth.com > To unsubscribe and view the Message Archive: see http://qth.com/force12/list > For problems with the list: contact n4zr@qth.com > -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force12 Web Site: http://www.force12inc.com To Submit Message to the List: Force12Talk@qth.com To unsubscribe and view the Message Archive: see http://qth.com/force12/list For problems with the list: contact n4zr@qth.com |