A couple of historical references on the current topic: https://www.mpoweruk.com/papers/Radcom_NVIS.pdf
https://www.mpoweruk.com/papers/Arnhem_NVIS.pdf Interesting articles. Lore notwithstanding! Merry Christmas to all. AG6CX Sent from my iPhone > On Dec 23, 2021, at 8:23 PM, Bill Parsons <[email protected]> wrote: > Dean Straw's December 2005 NVIS article with color graphics appears to be a > public access document and archived at the ARRL website at: > http://www.arrl.org/files/file/QST%20Binaries/Straw1205.pdf > > The version retrieved in the standard ARRL members only archives accessed > at the Technology tab Periodical and Archive Search engine has black and > white graphics. > > 73, Bill AF6AE > > On Sun, Dec 19, 2021 at 8:54 AM Ed Cole <[email protected]> wrote: > >> Thanks to Bill Parsons-AF6AE for the tip on the QST December-2005 >> article. Pulled it out and scanned it over (will read more thoroughly >> later) but interestingly showed how 80/40m coverage varied by time of >> day (which was demonstrated real-time in the 1980's on the Iditarod >> trail working into Anchorage). >> >> At home I only use those bands infrequently and mostly to talk out a few >> hundred miles in Alaska. Somewhere I read that a 40-foot high >> inverted-V would work well. I have a 50-foot tower mounted to end of my >> house with Hygain TH3mk4 tribander at tower top so hung my 80/40m fan >> dipole at the 40-foot level with end tapering down to 20-foot on one end >> and 15-foot on the other. Its hung on a line NW to SE but that seems to >> work out 400 miles just fine. >> >> I am going to re-hang that antenna next summer with 80m wire at right >> angle to 40m wire as the fan-style 40m tuning was affected by proximity >> of the 80m wire. As I have written previously, I will also run this as >> a top-hat loaded vertical on 160m/630m by shorting the 40-foot high >> feedline. >> >> I check into a weekly net on Saturdays (11am local time) on 3920 KHz. >> NC is about 70 miles south in Homer, AK (KL7PM) and consistently comes >> in at 30-40 dB over S9. He does run about 400w. I get at least S9 >> reports from him with my 100w and I hear other stations out as far north >> as Fairbanks (400 miles) pretty well. Band noise runs S7 (K3 PRE Off). >> >> 3920 is designated emergency channel for AK and often activated after an >> earthquake for tsunami watch. >> >> Ed-KL7UW >> K3/10+KXPA100 on HF/6m >> under construction is 3w/1200w W6PQL MRF1K50H amp >> ______________________________________________________________ >> 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] ______________________________________________________________ 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]
