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I have 5 of the W1JR types in various stages of construction, actually 2 are done but the problem has been finding a suitable enclosure that isn't too heavy and still supports the core. Next time the Telrex TB6EM was down I had decided to replace the coil of RG-213 with one, however, I am now really thinking about maybe putting up a C36XR instead. Anyway, I have no direct experience with the Force 12 Balun, only reputation and that seems to be pretty good. I have observed heating on the W2DU Balun in 160 inverted V applications and have a bunch of beads from an exploded W2DU Balun in the drawer. All in kilowatt applications. In 100w use I have observed heating in the W2AU Balun on a 40m dipole, but that isn't a bead type Balun. In limited tests I have not yet observed any heating on the W1JR type but have only tried 40 meters. I have relied on coax coils for many years now. I constructed a 80m inverted V one evening and pulled it up the tower. The neighbors were used to me fooling around in the middle of the night with things like that. Some quick tests showed I had hit the leg lengths just right and I was DXing. Well, for a couple of minutes anyway. I fired up the MLA-2500 and it just loved that antenna. But I kept seeing this bright light out of the corner of my eye and I would unkey the mic and look but it was gone. I was always a little slow after midnight and it was approaching 2AM local time. I finally realized it was connected with my transmissions and keyed the rig and looked, said my call and the bathroom 10" fluorescent bulb was glowing brighter than the sun! A fellow told me about putting around 14 turns of coax at the feedpoint and that cured it. Lot's of talk around the neighborhood about the strange acting fluorescent bulbs, seems mine wasn't the only one being lit. Reports came in from up to two blocks away, although it was so weak they could hardly see it at that distance.:) I guess the other reason that I have not yet left the coax coil is that I use so many antennas on multiple frequencies. My 40m rotatable CushCraft gets used on just about every band with the tuner in the TS850 sometimes. Can't do that with a ferrite Balun on that antenna. I was kind of wondering about how the C4 does with the Force 12 Balun on 12 and 17 meters or if that was not recommended due to the need for a tuner on those bands. 73 Greg K9ZM -------------------------------------------- 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 |