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writes: > I dont agree, that a big 80m yagi is a cheaper way than a 4-square. > A real working 4-square consists of slooping wires you can have for at > last less than 500 US $..what are the price for a 2el magnum 80m ?? > > I using wire constructed 4-square since 3 years, and believe me this > antenna works. get more that 315 countrys on 80m. You only need one > suporting tower, but this you also need for the yagi..all other stuff > (wires, cables, switching box etc..) you get much cheaper than the yagi. > You do not neet a rotator..so why you mean, a yagi is cheaper than a > 4-square??? > True enough. For some reason I was only considering a 4-tower set-up and not the simple but effective wire configuration you describe. Yes, those wire 4-squares work very well. > problems with a Force 12 Magnum after my experience > I have now after 4 years of using a Magnum 620/340 (D-Modell for high > winds) lots of trouble. > If you have your Magnum really have to run, you must install your beam > in minimum height of 1/4 lambda..this is 20m ore more. you need a tower in > a range of several thousand US $. The other problem, mechanical > construction from the Force 12 Yagis ist not that good. > I have now after 4 years of using a Magnum 620/340 (D-Modell for high > winds) lots of trouble. > -One linear loading wire from the 40m reflector has brooken. I've had this happen on an M2 75M beam but not on a Force 12 antenna but I imagine if I asked on TowerTalk that some people may have experienced wire failure. > -the fiberglass arm for holding and insolated the linear laoding wires > burned over on the driven element (had to put little ceramik insulators > in it to fixe this problem) I've had one instance of this myself. > - Mean problem, the I lost all the rivets on the boom-boom connetion > (factory assembled side) there was no bolt in this connection!!! > > The antenna really need some lateral bracing, to reduce the > bending moment to the boom. > > So the electrical performance of the antennas are very good, no > question..but if you live in a area that have more winds lik this > little southern California brise, you have to assamble something > additional to protect the antenna. There are D-versions (up to 100 MPH) and H-versions (up to 140 MPH) available. > > The front to back of this linear loading system also is not that > good. Compare to my old 2 ele 40m Highgain I only have 5-10 dB > on the Force 12 (3ele) and 20 dB on the 2 ele HighGain. > I know lots of people on the west coast replaced the linear > loadings with high Q coils. > > This are comments from a Force 12 user have 4 years of experiences > and I am not a dealer like K7LXC, who may be like to sale > a product.. > > 73 Wil DJ7AA To set the record straight, I very rarely sell a Force 12 antenna (2 in the last year) and basically refer all inquiries to the factory since the factory discount is so miniscule and their customer support so poor IMO. I also refer inquiries to Texas Towers since they do give a 5% discount on F12 products. I've given up trying to get Tom on the phone for any sort of question and as a result do not promote or sell Force 12 antennas. OTOH the non-linear loaded antennas antennas work great and I don't hesitate to recommend them. Cheers, Steve K7LXC Tower Tech Champion Radio Products -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force 12 Web site: http://www.qth.com/force12 Submissions: send to Force12Talk@qth.com To unsubscribe: send a blank e-mail to Force12Talk-leave@qth.com Force12Talk Message Archive: http://www.qth.com/force12/list/force12talk For problems with the list, contact n4zr@qth.com |
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