[SADXA] 40 meters
Jerry Wothe
jdwothe at cox.net
Sat Nov 23 14:35:17 EST 2019
For those who have been following Bill and his research on Gray Line and Long Path propagation, and specifically 40 meters, here is what happened at my station the first 18 hours or so of the CQ WW CW contest, that is going on right now. There is still time to get in the fray and work some new ones on 40 meters. You may have to stay up all night to get the biggest bang out of the conditions but it is going on.
This was my answer to Bill on my observation of the band last night and this morning.
Hi Bill:
> I hope you got up this morning and twirled your antenna around as there was plenty to listen to.
> At my station I have a visiting friend who wanted to come and use my station to work the contest, 40 m only.
> He started on time, 1700 local and worked the band until about 9:45 am this morning, local when he said, the West is still coming in strong but that is enough. I was sitting behind him watching him literally working the world. He laid his headphones down and I could hear a UA0 still calling CQ and he was loud. SR this morning was about 13:59 utc. There were JAs and BAs as well os the rest of SE Asia still going.
> To track the LP this morning I went out to the hamshack at about 12:45 am to see what was going on. The OP had been on since 0000utc last night but was still going strong.
> At 13:15 he said There is Zone 16 loud. We turned the antenna to short patch and he was gone. Back to LP and he was back up with a strong signal. Worked him.
> As a note from last night around 9 PM he started hearing JAs and JT5 which he worked. I have never worked a JA or JT that time of day on 40m. Up till then he had been working all stuff East and South.
> So this morning after noting that zone 16 was coming through we turned the antenna to LP EU and here is a sample of what happened.
> RK9AX Zone 17
> EW5A Z16
> 4L8A Z21
> OH5Z 13:50
> LZ6D 13:50
> UA4M 13:52
> RM9A 13:45
> LY8O Z15 13:54
> EW7LO Z16 13:58
> UWIM Z16 14:02
> SK3M Z14 14:03
> HA8TP Z15 14:08
> US6LN 14:12
> UW5U Z16 14:12
> R4MM Z16 14:13
> UA4W Z16 14:17
> A44A Z21 14:19
> OK2D 14:22
> EM2Q 14:23
> BA7IO Z24 14:24
> 4L8A Z21 14:25 HEAR
> 5B4ALU 14:30
> S51F 14:32
> J42L Z 20 14:35
> OZ4M 14:39
> UX0LLG Z16 14:42
> SO7M 14:43
> 3B8? Z39 14:47
> DL0GL Z14 14:49
> RL3A Z16 14:51
> EU1A Z16 14:52
> TURN THE ANTENNA WEST AGAIN
> JO7KMB Z 25 1457
> SEVERAL OTHER JAS
> 4E1A Z 27 14:59
> BI4XDT Z 24 15:00
> ANT BACK SOUTH
> LP PRETTY MUCH DONE. SOME SIGS BUT GETTING QUITE WEAK
> ANT WEST AGAIN,
> BG6SZD Z24 1519
> 9M2TO Z28 15:19
> HS0 HEARD 15:21
> DU1 HEARD 15:22
> 7A0D 15:24
> TIME FOR BREAKFAST BUT STILL SOME STRONG SIGNALS FROM SE ASIA.
> This afternoon we will start around 3PM and expect to hear Eu AF and if we were to turn the antenna to the SE probably LP to SE asia around 4:30 local.
> Totals for about 18 hours of operating is 111 Countries worked, 575 Qs and 36 zones.
> Will try and fill the holes in the zones we don't have yet and gain a few more countries.
> I hope this gives you an idea of what the LP looks like on 40 M.
> 73's
> W6XI
>
>
> > > On November 22, 2019 at 8:33 PM "W7EXG (Bill)" <W7EXG at q.com> wrote:
> >
> >
> > Hi Jerry,
> >
> >
> >
> > I have convinced myself that 40m DX after SR between US and DX Easterly is LONG Path. I also convinced myself that the 40m DX during the DAY prior to SS is also Long Path between US and Westerly . The key reasoning was due to strong D absorption loss in the DAY SHORT paths across the Solar Noon boundary between the respective ocean regions.
> >
> >
> >
> > For the 11/22 1330z case, the short path and the long paths both include darkness AND 40m DX DAYTIME propagation. It appears the short path has a shorter DAY path and the Long Path has a longer DAY path. Both signals would experience about the same loss per F2 hop during the DAY path.
> >
> >
> >
> > Thus one would expect the short path would have had less attenuation.
> >
> >
> >
> > This expectation is what is confusing to me in this particular case.
> >
> >
> >
> > Imagine, for the moment as the world turned, both stations became in the gray-line together, so both short and long path were in the gray-line. Would the Long Path still prevail?
> >
> >
> >
> > I guess I am wondering if there might be a transition from long to short path during some of these cases.
> >
> >
> >
> > I certainly yield to your vast experience with your 40m yagi. I have not used mine enough to gather this kind of definitive data. However, my interest has been sparked, and tomorrow early am, I plan to be rotating my 40m 3 ele Yagi during the contest !! Hi Hi
> >
> >
> >
> > The Long Path good news is of the 19500 Mi Long Path for Dave’s case, I estimate about 10,000 mi was 40m DX Daytime path. This is similar to the Long Path DAY distances we saw with Heard Island , when Heard was more than 2 hours past their SR.
> >
> >
> >
> > Best 73’s, and thanks for your input.
> >
> > Bill W7EXG
> >
> >
> > ---------------------------------------------
> >
> > From: Jerry Wothe [mailto:jdwothe at cox.net]
> > Sent: Friday, November 22, 2019 3:04 PM
> > To: Southern AZ DX Association E-Mail Reflector ; W7EXG (Bill)
> > Subject: Re: [SADXA] 40 meters
> >
> >
> >
> > Hi Guys. The path this morning was LP and that is very normal this time of day. I have worked it many times up to maybe and hour before SR and well after SR. One first hears the middle east and deep Russians and as the time goes by the path moves West into Eu and ends up in the Northern EU area such as DLs, SM, even LAs before it gives up.
> > Every day is different. If you really want to hear what happens on 40 this time of year watch the band starting NOW. at 1500 local Eu should be in SP shortly and with the contest on you can get a great feel for what the band is like at our afternoon and evening right up to after SR tomorrow and then start all over again tomorrow afternoon.
> > This is one of the weekends that Bill, K6WSC, talks about when he says you can work DXCC in one weekend. That is a very true statement and I have been there several times over the years.
> >
> > This is also one of the best weekends to pick up a few new ones. But you have to forget FT-8 and use that old antique mode CW.
> >
> > Good Luck and it starts in just two hours at 0000 UTC. 5 PM our time
> > Good luck
> > W6XI
> >
> >
> > On November 22, 2019 at 10:15 AM "W7EXG (Bill)" <W7EXG at q.com mailto:W7EXG at q.com > wrote:
> >
> >
> > Dave,
> >
> > In my review of your 40m DX path, your QSO was a 40m Gray-line/DAYTIME path.
> >
> > It appears the path started totally in the Gray-line region 1/2 hr. before
> > SR, but exited into the DAY region and terminated in the DAY region 42 min
> > before SS. Half of the path was traveling somewhat parallel to the
> > terminator but was in the Day Region.
> >
> > So, strictly specking, this was a 40m DX DAYTIME path, since part of the
> > path was on the DAY side of the terminator.
> >
> > You also bring up an important point: If one studies the gray-line now in
> > the early AM, there is great opportunity along the gray-line into the EU
> > area in our early AM. As your data shows, the path does NOT need to be
> > strictly IN the gray-line. Although half that path was being absorbed by
> > D-absorption, it was sufficiently low to allow the QSO.
> >
> > Where the presented 40m DX DAY Corridor will ALSO come into play is later
> > today after noon. You should AGAIN be able to work Easterly and NE into EU
> > area, and other DX, as the terminator starts to approach you from the East.
> > Take a listen.
> >
> > Don't forget to listen Westerly in the early AM after SR for DX. Last year,
> > I worked YB and YC stations on 40m SSB at about 9:30am on Dec. 23. This was
> > about 2 hours after SR.
> >
> > As Annette suggested, these inputs are important to encourage others to
> > listen for 40m DX during our day.
> >
> > I truly hope someone works or even hears 40m DX as we get closer to Dec. 21
> > and closer to our NOON.
> >
> > 73's
> > Bill W7EXG
> >
> > -----Original Message-----
> > From: sadxa-bounces at mailman.qth.net mailto:sadxa-bounces at mailman.qth.net [mailto:sadxa-bounces at mailman.qth.net mailto:sadxa-bounces at mailman.qth.net ]
> > On Behalf Of w7aqk at cox.net mailto:w7aqk at cox.net
> > Sent: Friday, November 22, 2019 6:49 AM
> > To: ' Southern AZ DX Association E-Mail Reflector '
> > Subject: [SADXA] 40 meters
> >
> > Good Morning All,
> >
> >
> >
> > I don't know if this is some of that strange 40 meter propagation that Bill
> > talked about last night, but I just worked SM4OTI (Steve) on 40 meters CW at
> > around 1330Z. It wasn't great copy, but it was a QSO. That's a bit late
> > for propagation to Europe isn't it??? It's mid day for Steve and just
> > slightly before sunrise here. Of course by this time of year Sweden is in
> > the dark most of the time! Hi.
> >
> >
> >
> > Anyway, it was a surprise that I could even be heard with my 100 watts.
> > There's probably some other explanation for it, but I couldn't help but
> > think of Bill's presentation. I was expecting to only hear stations west of
> > me.
> >
> >
> >
> > Dave W7AQK
> >
> >
> >
> >
> >
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