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Jim, I have to agree with Jim/Barry... I seriously doubt you will find much use for the vertical. I have a Hygain Hytower which has always served me well (I actually have -2- of them), but rarely use the Hytower since I installed the C4XL at 72 feet. I think you may have a concern for those high voltage strokes of terror the vertical may encouter. I have an "H" frame mounted above my C4XL with ten foot of separation from the lowest (2m horizontal) yagi and found no "noticeable" interaction with it or the frame itself. Mel, K0PFX -----Original Message----- From: Jim Smith [mailto:jimsmith@shaw.ca] Sent: Monday, April 07, 2003 16:46 To: force12talk@qth.com Subject: [Force 12 Talk] R5 mounted above C4SXL - good idea or bad? 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 |
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