Hi guys
You have both surfaced a topic that is of great personal interest to me as I
have worked JA on 160m around 2100z both from K1ZM on Cape Cod and from VY2ZM
on PEI many many times.
The conventional wisdom is that signals propagate SE over Africa and VK6 on
Topband at 2100z but I no longer believe this to be cast in concrete.
Why?
I have had many many contacts with JH7PFD starting as early as 2024z from PEI
and Kin san has many beverages from which to select. Among them are ones that
look at 220 degrees and some that look over the North pole on either side.
Carl suggests here in his posting that the JA's listen at 220 degrees for NA at
this time - but time and time again Kin-San has reported that my160m signal is
inaudible from the SW near his SR - instead he hears me from the NE which is
short path.
On my side. I can aim my 160M antenna such that it is firing due North with
6.0db of directional gain and I too hear Kin san and JA8ISU at this time from
this heading - and not out of the SE path.
Now how can this be true? Well, if one takes a look at the plot that Carl has
included in his article, you can see the RED short path to which he refers is
also in darkness at 2100z - and my postulation and Kin-san's is that the true
path by which we are communicating is over North pole and not over VK6 at all.
This observation has been reported by some other JA observants as well.
I should note, though, that from NY, Cape Cod and from PEI on 80m the 80m path
is indeed SE and SW at 2100z but not on Topband which has always puzzled me.
What makes this so had to fathom is that the window of opportunity to do this
occurs each Winter season from roughly 05 Dec to 15 January typically each year
and that so few of us have truly directive Xmit and Rx antennas on Topband with
which to make really precise observations.
Bottom Line for me?
This160m path is over the North and not over Vk6 on Topband and having worked
HUNDREDS of JA's on 160m at 2100z from VY2ZM - I do believe my own ears and
equipment.- despite what I had always previously thought.
By the way - this path has (to my knowledge) only been worked from Eastern
Canada, Maine, Mass and in Connecticut (by K1KI on the Mass/Conn line). I know
it has been heard (not worked) from RI on 160m by John W1XX - but no qso's that
I am aware of have ever been made further South of New England on Topband. The
overlapping darkness that is needed to sustain propagation just does not make
it down to even W2 usually on Topband.
Hope this adds something to the mix.
73 JEFF K1ZM/VY2ZM
-----Original Message-----
From: Dave Bowker via Topband <topband@contesting.com>
To: topband <topband@contesting.com>
Sent: Thu, Sep 24, 2015 4:03 pm
Subject: Topband: K1FK to JA Via 160-Meter Long Path
Carl, K9LA, has posted an interesting analysis of a skewed path TopBand QSO in
the August 15 'Monthly Feature' on his
site.
http://k9la.us/Aug15_K1FK_to_JA_on_160m_via_Long_Path.pdf
Dave,
K1FKFort Kent, ME
_________________
Topband Reflector Archives -
http://www.contesting.com/_topband
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|