Some OCF dipoles work very well when used with a 2-choke balun, see DJ0IP for suitable designs. Spiderbeam make proper 2-choke baluns for their OCF dipoles but I don't know of any others. It's all about suppressing those common mode currents on the outside of the coax. He and I have both measured common mode currents with different chokes; see his site for details. http://www.dj0ip.de/balun-stuff/
David G3UNA ----- Original Message ----- From: "Warren Merkel" <[email protected]> To: <[email protected]> Sent: Wednesday, May 18, 2016 1:23 PM Subject: Re: [Elecraft] RFI and Direct tv or Dish network >I have a DirecTV system and haven't had as good luck with RFI as the > others here. My dish is about 40 feet directly below and near the end > of an OCF 80m Windom. It worked out that was the only realistic > position that afforded full Sat views through the trees. > > Usually nothing happens at 100w HF output, but when I run the power up > to 500w (depending on band), two of my DVRs either "turn off" (standby > really) or start randomly recording whatever channel is being tuned at > the time. I've got the dish grounded and the RG6 feed is passed > multiple passes through large #31 ferrites, with no overall improvement > in RFI. > > I would recommend much more separation of antennas and feedline than I > have, if possible. > > Warren, KD4Z > > On 5/17/2016 10:08 PM, w9hak <[email protected]> wrote: > I am contemplating dropping TWC and going to a satellite system. Any > > advise on rfi would be appreciated. > > Smith Bradford > W9HAK > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
