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I will be sending you some photos of my final installation. I did a number
of tests comparing how tight you can wind the loops. I was amazed at how non critical it was, considering all the dire warnings one receives from the old wife's tales. Aside from all the ham bands, I have the need to get down to 3.347 MHz as well. My setup with the thumbwheel digital rotary switches lets me look at my chart, see 3.5 MHz needs 39 additional feet and set 39 in the switches, I built a box outside the house with 4 dowel rods to wind the loops around. It worked out great both mechanically and electrically. After I inserted the relay box, I cut additional feedline off the 90 foot feedline so the output side at the end of the coax agreed with the original readings. Once that was accomplished all the plots were in agreement with the predicted except on 40 meters. Predicted should have been 7.3, actual was 6.8 MHz. Easy enough to correct for, but have not yet figured out what causes it. All other freqs were spot on. Worst SWR is 1.8:1 I am a happy camper. On 75 an A/B test shows no difference was noted between it and a 75 meter dipole. I need to A/B it on the other bands yet. My method of 1,2,4,8 and 10,20,and 40 feet uses extra feed line, but is made up for in the ability to enter feet directly on the switches. Three other folks here are constructing a duplicate. "Cecil Moore" wrote in message ... Fred W4JLE wrote: All my feedlines have a 9:1 SWR by design. Heh, heh, I understand perfectly. Don't know how many others do. :-) All my feedlines have an SWR between 5:1 and 13:1 by design. -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
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