EI7GL....A diary of amateur radio activity

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12,600km opening from Europe to the Falkland Islands on the 40 MHz band -
10th April 2022

Posted: 11 Apr 2022 10:30 AM PDT https://ei7gl.blogspot.com/2022/04/12600km-opening-from-europe-to-falkland.html



This really is an amazing reception report. Read on...
On Sunday the 10th of April 2022, Phil EI9KP was carrying out some
experiments on the new 40 MHz band.
From 09:00 to 12:00 UTC, he tried transmitting on WSPR on 40.680 MHz with
the hope that some stations in England might hear the signal but to no
avail.
In the afternoon, EI9KP switched to FT8 and managed to successfully decode
the FT8 signal from the EI1KNH beacon near Dublin on 40.013 MHz.
After that, EI9KP sent a sequence of FT8 transmissions on 40.680 MHz.
Little did he realise at the time that his VHF 40 MHz signal would reach
the Falkland Islands off South America, a distance of roughly
12,600kms!Txmtr Rcvr Band Mode Distance Time (UTC)
EI9KP VP8ADR/40 8m FT8 12602 km 14:33:14
EI1KNH EI9KP 8m FT8 210 km 14:27:11
At 14:33 UTC, Bob VP8ADR successfully decoded the FT8 signal from EI9KP
using just a fan dipole resonant for 40m, 20m & 10m.
What makes it even more remarkable was that VP8ADR was only having a quick listen to the 40 MHz band after an email from Paul, G7PUV (G9PUV) informed
him about his 40MHz transmission from England using his Innovation &
Research licence.
It really was just good luck that Bob was listening at the same time as
Phil was transmitting and the band was open at the same time.
When I first heard about this reception report, I thought surely someone
has made a mistake. Someone had the wrong band setting on their software or something else. But no, both EI9KP and VP8ADR have confirmed to me that
they were transmitting and receiving on the 40 MHz band.

For the record, Phil EI9KP was using 20 watts from an ICOM IC-7300 fed into
a home made 40 MHz band pass filter and the antenna was a delta-loop for 40 MHz.
Analysis... My first reaction is just WOW! Who would have thought a low
band VHF signal at 40 MHz would get from Europe to the Falklands in April? Unlike other openings at 50 MHz, I suspect that this time there may have
been no Sporadic-E involved. I think it's a case of F2 and possibly TEP
signals extending above 30 MHz on North-South paths and actually reaching
the 40 MHz band.
My first question is what other paths are open at 40 MHz that we're not
even aware of?
One thing is for sure. If a FT8 signal at 40 MHz from Europe can reach the Falkland Islands then one from the USA certainly will. It might be time for some of those US stations with experimental 40 MHz calls to send some FT8 signals to the south.

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