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Typical Operating Schedule

Usually QRV CW most evenings, tuning between 472.5 kHz and 475 kHz with CQ's on or near 474.5 kHz. Occasionally QRV JT9, 474.2 kHz dial + 1000 - 1350 Hz. QRV some mornings starting around 1100z on CW. Sked requests are welcome. All activity is noise and WX permitting

Quiet start to the session where band was quick to open in the East and slow in the West as G1 storm conditions return overnight; Good West coast JT9 openings to KL7L; Many CW reports on reverse beacon network but did anyone connect?; G0MRF/p QRV JT9 beginning December 19 looking for North America; W5EST presents: ”KH6-LA2 WSPR2 on 630m at last!”

– Posted in: 630 Meter Daily Reports, 630 Meters

The details for December 17, 2016 can be viewed here.

The UTC amateur registration database is here.

HERE are a few mode-specific comments addressing where modes are located now and probably where they are best placed in the future

Operator lists detailing stations that are two-way QSO-capable can be viewed here.

Spot stations calling CQ on any mode here on DXSummit and help them find a


North America experienced storms in the southern coastal regions and heavy rain in the south central region which increased precipitation static during the evening and overnight (I was at ground zero for this!).  Southern Europe and the Mediterranean continue to be active which I suspect is seasonal. The western Pacific and isolated areas of Japan continue to experience lightning-rich storms.  Many population centers in Australia and New Zealand are inundated with lightning which appears to be seasonal but is particularly bad this year.

12-hour worldwide lightning summary


Geomagnetic conditions reached G1 storm levels as reported by Solarham and may persist for a few sessions.  There was no gentle lead-up to this Kp spike which introduced the storm conditions,  instead going from quiet to G1 in the span of a single reporting period.  The Bz is pointing slightly to the South this morning and solar wind velocities are averaging near 340 km/s. DST values were experiencing a nice peak but have since decreased significantly due to storm levels.



Propagation was reported by W7IUV as poor early in the evening, particularly in the West where the band did not show life until about 3 hours after sunset when the band opened for about 2 hour in the Pacific Northwest.  Propagation in the East may have been significantly better early and a number of new QSO’s were reported.  The salt water paths to KL7 were reported to be very good during the late evening by West coast stations.  Morning band conditions following the peak of storm conditions appear to have been very good based on reverse beacon reports.

Reverse beacon reports for the session follow:


David, G0MRF, reported an upcoming remote operating activity starting on December 19 that may give North American stations a very good chance to work him using JT9.  David will be using an Icom 7300, amplifier and filtered preamp from a very quiet site that he has used in the past.  The antenna will be 114-foot tall and located at a high location if I am recalling correctly.  Mark your calendars as David is planning on losing sleep to make this event a success.  More details will be forthcoming as the date nears.  David notes that this event will go through the New Year or until the antenna falls down.

The following stations provided reports of their two-way QSO’s and/or any additional activity that might have occurred during this session (this is not necessarily a complete list – only what was reported!):

Terry, W8ARE, reported JT9 QSO’s with K9MRI and KA9OKH, bringing his WAS total to seven.  Using WSPR overnight, he reported 29 stations and he received reports from a personal best 61 unique stations.

Al, K2BLA, reported “Sort of quiet night and morning. Worked only K9SLQ this AM On WSPR hrd by 44 and hrd 24 Nothing from the west coast and very little west of the Mississippi.

Tom, WB4JWM, reported JT9 QSO’s with K9MRI, K9SLQ  and KA9OKH.  Tom indicated that he has some additional work to do with his receive system.  My comment to this is that improvements in receive antenna systems will always be ongoing.

Joe, K9MRI, reported JT9 QSO’s with WB4JWM, KK1W and W8ARE.  He also reported hearing W7IUV at -20 dB S/N during the early evening.

Wayde, K3MF, reported seven initial JT9 QSO’s during this session, including but not limited to KK1W, K9SLQ, KA1R and K9MRI.  Wayde was using a new homebrew transverter.

Roger, VK4YB, reported that “QRN is bad as usual. TP propagation has widened to reach down the coast of California. Good conditions to Alaska and Japan continue.”  Roger had a single reception of his JT9 transmission at KL7L at -26 dB S/N at 1328z.

Larry, W7IUV, reported at 2351z that he was decoding JT9 from K9KFR at -27 dB S/N.  This was very early in the session for Larry and a long, transcontinental haul for Bob.  Larry also reported that ice prevented activity from his station overnight.

Bob, K9KFR, reported at 0300z that he was hearing N1VF at -28 dB S/N.  It is possible that Bob also completed a JT9 QSO with K3MF but that is not confirmed.

Roger, VE7VV reported at 0515z that he was hearing JT9 from KL7L but its unclear whether Laurence was not hearing him or Laurence was indisposed at the time of Roger’s CQ’s.’

Robert, KR7O, reported “Limited monitoring prior to 0600Z, but conditions seemed good, in spite of lightning crashes.  Great cdx to KL7 with KL7L copied as early as 0236Z.  Copied KL7L (-14) calling a VE7 on JT9, but the station did not appear to hear Laurence.  15 WSPR stations copied, mostly after 0800Z including TC to W3LPL (3/26), K4SV (30/-17), K4LY (7/-22), N1DAY (2/-26) and ZF1EJ.

ZF1EJ 2 spots, -27 (not copied after 0700z)

KL7L 60 spots, -11

K9FD 70 spots, -1

VK4YB 1 spot, -28

Trans-Atlantic WSPR summary follows:






Trans-Pacific WSPR summary follows:





Hideo, JH3XCU, submitted this link detailing DX -> JA WSPR decode totals and DX -> JA WSPR S/N peaks for the session, as reported on the Japanese language 472 kHz website.


Regional and continental WSPR breakdowns follow:

North American 24-hour WSPR summary


South American 24-hour WSPR summary


European 24-hour WSPR summary


Japanese 24-hour WSPR summary


Chinese 24-hour WSPR summary


Indonesian 24-hour WSPR summary


Oceania 24-hour WSPR summary


Eden, ZF1EJ, reported sixteen WSPR stations including K9FD and he received reports from 65 unique stations including YV7MAE.

ZF1EJ session WSPR summary


Martin, YV7MAE, reported four WSPR stations.

YV7MAE session WSPR summary


Kevin, KL7KY,  reported WSPR from KL7L and W0YSE during this session.

KL7KY session WSPR summary


Laurence, KL7L, was active with JT9 during the evening, receiving reports from N1VF and KR7O (-12 dB S/N).  Both stations have significant salt water paths to KL7 which does not hurt.  It was also reported by W0YSE that Laurence was hearing KA7OEI in Utah on JT9.  Laurence had obligation which prevented him from long term activity during the evening that might have led to a QSO but its good to see that these stations may have a chance to complete QSO’s with Laurence soon.  Laurence also reported a single JT9 transmission from VK4YB at -26 dB S/N at 1328z.  Using WSPR overnight, Laurence reported six stations including VK4YB and he received reports from 23 unique stations including JA1PKG and JA8SCD5. He shared two-way reports with K9FD, KA7OEI, KR6LA, N1VF, and W0YSE.

KL7L session WSPR summary (not shown:  JA8SCD5)


Merv, K9FD (/KH6), reported seven WSPR stations. He shared two-way WSPR reports with K5DNL, KR6LA, N1VF, W0YSE, VK4YB and KL7L. Merv received reports from 54 unique stations including 7L1RLL4, JA1NQI/2, JA1PKG, JA3TVF, JE1JDL, JH3XCU, KL7L, TNUKJPM and ZF1EJ.

K9FD session WSPR summary


Jim, W5EST, presents “KH6-LA2 WSPR2 ON 630M AT LAST!”:

“Yesterday, at a distance of 10524 km, K9FD on Molokai into LA2XPA on the west coast of Norway achieved a singleton WSPR2 decode. The breakthrough happened about 6 minutes after Norway RX station sunrise SR–about 5 hours after Molokai’s sunset SS at 0350z.

2017-12-16 09:10   K9FD   0.475617   -28   0   BL11je   1   LA2XPA   JP33wi   10524   7

Demonstration of this 630m KH6-LA2 path at 1 watt amateur power level is a testament to the day-after-day persistence of these 630m operators.  Congratulations!

Post-SR decodes of N.America stations have occurred at LA2XPA, and not from Hawaii to LA2 as far as I know. http://njdtechnologies.net/120516/    Each day there in Kristiansund, Norway, just now the sun stays within 3.8° of the horizon for as much as 2.8 hours as post-SR regime lasts all morning. http://njdtechnologies.net/121216/  Moreover, with SR in the SE at LA2XPA and aligned with K9FD’s RF path from the NW, conditions are favorable for a sunrise related propagation enhancement. Such an enhancement can slightly tilt the ionosphere not far west of sunrise there, directing more RF rays to LA2XPA’s RX antenna.

From a seasonal viewpoint, K9FD and LA2XPA triumphed 5 days before winter solstice–Dec. 21 in N. Hemisphere when Molokai and Norway share their longest 630m duration of common darkness.

Suppose the propagation were great circle multihop E, say 5-Ehop at 2105km per hop. Then a midpath sky reflection in the E-region occurred for 5-Ehop within an hour of deep winter midnight in NE Alaska (5262km from Molokai, halfway from Fairbanks to the Arctic Ocean coast).

Perhaps 4-Ehop prop was effective additionally or instead, at 2631km per hop. In that 4-Ehop case, two middle-path E-region reflections (at 3947 km and 6577km) were grazing the ionosphere east of Kodiak Is. (S of Anchorage AK) and also west of Prince Patrick Is. in the Arctic Ocean.  Either way, the middle-path 630m RF encountered reflective ionization in the middle-of-night deep winter night at high latitudes on its way to LA2XPA at Kristiansund, Norway, and passed over the top of Greenland on the way.

In the Arctic, the geomagnetic field (GMF) is steeply inclined as we know. Also, the ionosphere is probably not perfectly horizontal at the sky reflection places. So, one cannot rule out 630m multihop skew propagation here.  However, skew propagation would be subject to the same short time window of geoscale common darkness and would need at least as many hops. More hops could effectively shorten the estimated one hour or less for this path in this best-case December time of year.  See the calculation and birds-eye chart for KH6-LA2 opportunity window at: http://njdtechnologies.net/120716/    Accordingly, I have discussed this event as if it were great circle (g.c.) propagation.

Would ground reflections disfavor one prop mode compared to another’s ocean surface reflections?  Recall for this path 5-Ehop: 2105km/hop.  4-Ehop:  2631km/hop.

  1. Greenland on this path covers the distance interval 2070km-2600km from Norway. Both 4-Ehop and 5-Ehop modes would probably narrowly miss N. Greenland. The Alaska landmass covers 4400km-5420km  from Molokai.

Based on those numbers, I’d say 5-Ehop jumped over Alaska. But 4-Ehop had an earth ground surface reflection in NE Alaska–it would be no stronger than 5-Ehop prop.  Just possibly, the 4-Ehop and 5-Ehop modes could constructively interfere occasionally and provide up to 6 dB more signal strength than either mode alone.  (6dB=20log10 2)

On Dec. 16, why didn’t N. America stations deliver any decode at LA2XPA if K9FD/KH6 was able to do so?  Among N. America stations that might be likely candidates, VE3EFF and KL7L were QRV that night at the time in question.  Perhaps still other stations had been having a good session of JT9 earlier and were not doing WSPR, which is station-specific and operator decision of course.  I do think paths were probably open from some N. America locations to Norway and will be in the coming days.

Auroral oval:  Either KH6-LA2 or KL7-LA2 great circle RF path would geographically cross the Au oval at two places, but the path in the sky matters as well.  KL7L lies 5992 km distant from LA2XPA, 4500km from Molokai, with KL7L-LA2 possible 3 & 4 E-multihop modes. 3-Ehops KL7-LA2 geographically very nearly matches the last three hops of KH6-LA2 prop by 5-Ehops mode .

If 5-Ehop KH6-LA2 missed the Au oval by passing under it some places, 3-hop KL7-LA2 should have missed the oval also.  However, 4-hop KL7L-LA2 might have intersected the Au oval at altitude when 3-Ehops KL7-LA2 did not.  Even so, I think it’s a mystery why the more powerful 5w KL7L didn’t get decoded at LA2 that night.

Duct prop: The fact this 1w K9FD-LA2XPA event was a singleton decode could be due to a chance duct event.  But why at Norway sunrise?  Why not earlier too?

So much for the questions. Will the KH6-LA2 path get completed more days for at least the next two weeks? Will other N. America stations “make the trip,” as they did a year ago? What times of night can such paths complete?  How many days longer might such polar paths endure after that—even into January, perhaps?  Only further 630m persistence can tell us!

TU & GL to all 630m operators as we move through this season!”

Additions, corrections, clarifications, etc? Send me a message on the Contact page or directly to KB5NJD gmail dot (com)!