[Elecraft] ?ELECRAFT NVIS field day?

[Edward Mccann]


A couple of historical references on the current topic: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 <bparsons.ieee at gmail.com> 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 <kl7uw at acsalaska.net> 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
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