On Fri, Oct 21, 2011 at 8:06 AM, Steve Walter WA3A <[email protected]> wrote:
> ....IMO, an outside ground thats brought to the 2nd floor is > not needed and in fact will cause problems.... ========= Don, I think that Steve's comment above may be on the right track. First things first: cobble up a good star-system for tying everything together with short fat wire or strapping to get all the chassis at the same RF potential. Then kill off the common mode currents that run on the outside of your coax; I've had great luck with RF isolators from http://www.radioworks.com/ct-4.html I have one between K3 and amp, and another between my tuner and the balun that goes to my antenna system. I have a simple counterpoise system from the second-floor window to the garage roof, and that connects to the cold side of the balun. It is also where the outside grounding system connects. If there are still some strays, you can use snap-on ferrites, but I have found in a couple of different installations that once the common-mode currents on the coax are dealt with, there aren't any further RF problems. Steve also mentions that his shack is in the middle of a rhombic antenna, which suggests that your loop arrangement may work fine once you get the shack setup tamed. 73 and good luck, Tony KT0NY -- http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352 ______________________________________________________________ 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
