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1. W9JCCs issue with 10 meter standing waves could be caused by either leaky coax or random wire type pick up from the antenna. Neither of these are balun issues. It's unlikely that a balun would work better on 15 than on 10 unless it somehow resonated near 10 which is unlikely (a coax coil could do that if you'r not careful). I fully suspect he has no real problem. 2. If an antenna has zero SWR, then there will be no standing waves on the coax with or without a balun. I've used various real world antennas with no balun and they work fine. The "unwanted" radiation from the coax is NOT necessarily a bad thing. Given a decent SWR in the first place, the amount of "undesired" radiation is not going to affect the antenna gain for all practical purposes. It only fills in the deep nulls a bit. If I happen to work a ZL off the back or side of the beam, its better than not working him. That said, I'm still a proponent of using a balun of some sort since its very useful when the SWR gets a bit higher than optimal and the potential for coax radiation gets to be more than just minor (like operating 40 SSB when the antenna is tuned for CW). 73, Al AD6E -------------------------------------------- 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 |