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Station ground/2nd floor
Cecil Moore wrote:
John, N9JG wrote: Finally, I found that the only way to prevent feedback on SSB was to NOT connect my system to the #8 ground wire that runs out the window sill and down to a ground rod. Yep, everyone should realize that a ground wire is N*1/4 wavelength at certain frequencies, and at those frequencies, is an RF transformer that locates the standing-wave voltage maximum points at the transmitter. (ouch!) That's what artificial grounds do - change that *electrical* length to N*1/2 wavelength. For anyone insisting on an RF ground for an upper floor, an artificial ground is probably the way to go. I, myself, prefer balanced antennas and feedlines. -- 73, Cecil http://www.qsl.net/w5dxp Why not run two ground wires in parallel -- one twice as long as the other? When one is Hi-Z the other will be Lo-Z and vice versa. Irv VE6BP -- -------------------------------------- Diagnosed Type II Diabetes March 5 2001 Beating it with diet and exercise! 297/215/210 (to be revised lower) 58"/43"(!)/44" (already lower too!) -------------------------------------- Visit my HomePage at http://members.shaw.ca/finkirv/index.html Visit my Baby Sofia website at http://members.shaw.ca/finkirv4/index.htm Visit my OLDTIMERS website at http://members.shaw.ca/finkirv5/index.htm -------------------- Irv Finkleman, Grampa/Ex-Navy/Old Fart/Ham Radio VE6BP Calgary, Alberta, Canada |
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