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OFF AIR but returning after dark on Saturday night

Oddly quiet session with strong signals across North America; WH2XGP –> VK2XGJ, VK2DDI, VK4YB continues; WG2XSV continues to impress at 200 mW ERP; Pre-sunset and post-sunrise reports in VK for WH2XCR

– Posted in: 630 Meter Daily Reports, 630 Meters

“Had a good overnight low noise RX session… almost like it was winter.”  – Ken, SWL-EN61, in Indiana

Like Ken, many of us on 630-meters received the nice surprise of a quiet band with good propagation and reports at high S/N levels.  Many reports were, at least at my station, high even by Winter standards.  What makes the session even more bizarre is that we continue to flirt with geomagnetic storm conditions as a worst case and unsettled conditions at best where the Bz is pointing to the South, strongly in some cases.  Solar wind velocities  peaked above 500 km/s but have decreased to below that level during the preparation of this report.  John, WA3ETD / WG2XKA, reported a flat session from his station in Vermont so perhaps this is a reminder that high latitude conditions continue to struggle after the recent geomagnetic activity.  I should note that John was reported here at my station in Texas during the evening which often represents a pretty good session ahead.  Texas is a very long way from Vermont.

planetary-k-index 041416


Kyoto DST 041416


Australia 041416


Phil, VE3CIQ, reports that most of his decodes were in the East with six WSPR stations decoded and 21 unique stations decoding his signal through the session.

VE3CIQ 041416

VE3CIQ session WSPR activity


Neil, W0YSE/7 / WG2XSV, continues his great run at 200 mW ERP which should bring hope to any station that thinks they might not be able to be successful at MF.

WG2XSV 041416


Doug, K4LY / WH2XZO, reports a good session from South Carolina and hopes to evaluate his new E-probe shortly.

WH2XZO 041416


Mark, WA9ETW, reported nine unique WSPR stations decoded when he QRT’ed near 0430z.

Ken, K5DNL / WG2XXM, reported that he decoded eleven WSPR stations and was decoded by 39 unique stations during the session.

Larry, W7IUV / WH2XGP, reported that he decoded eight WSPR stations and was decoded by 39 unique stations, including reports from three VK stations.

WH2XGP VK2XGJ 041416

WH2XGP, as reported by VK2XGJ


WH2XGP VK2DDI 041416

WH2XGP, as reported by VK2DDI


WH2XGP VK4YB 041416

WH2XGP, as reported by VK4YB


Don, WB3FTQ, a recent addition to the 630-meter receive corp, sent a nice email with details of his station and screen captures of his receptions, included below.  Don reports that he is listening with an 80/40-meter fan dipole at 35-foot where the ends are oriented at 0/180-degrees true.  His receiver is a Flex 6700.

WB3FTQ 041416a

WB3FTQ WSPR console


WB3FTQ 041416b

WB3FTQ Flex 6700 waterfall and console


WSPR activity dominated the session once again with 70 MF WSPR stations observed worldwide at 0100z.  No confirmed new stations were observed during the session but KC1ANM, NV1O, and N6IO/M are believed to be returning stations from previous sessions earlier in the season.

Regional and continental WSPR breakdowns follow:

NA 041416

North American 24-hour WSPR activity


EU 041416

European 24-hour WSPR activity


VK 041416

Australian 24-hour WSPR activity


JA 041416

Japanese 24-hour WSPR activity


There were no trans-Atlantic or trans-African reports during this session. UA0SNV was reported as listening but no reports were found in the WSPRnet database.

What a difference a day makes for Eden, ZF1EJ, as quieter conditions prevail, yielding reports across North American in addition to WH2XCR.

ZF1EJ 041416

ZF1EJ 24-hour WSPR activity


WH2XCR ZF1EJ 041416

WH2XCR, as reported by ZF1EJ


Laurence, KL7L / WE2XPQ, received and provided reports to the usual cast of stations in the western portions of North America and Hawaii.

WE2XPQ 041416

WE2XPQ 24-hour WSPR activity


WE2XPQ WH2XCR 041416

WE2XPQ, as reported by WH2XCR


Merv, K9FD/KH6 / WH2XCR, received pre-sunset reports from John, VK2XGJ, starting at 0726z (sunset at 0744z).  Merv reports that he continued to receive reports from Australia until 1622z, 12 minutes after his local sunrise.  Two-way reports were plentiful, with VK3ELV and VK4YB.  Additional reports were received from WE2XPQ, JH3XCU and VK2DDI in the Pacific region.  Merv also received reports from the eastern portions of North America in addition to ZF1EJ.

WH2XCR 041416

WH2XCR 24-hour WSPR activity


WH2XCR VK2XGJ 041416

WH2XCR, as reported by VK2XGJ


VK2XGJ 041416

VK2XGJ WSPR console with WH2XCR pre-sunset reports


WH2XCR WE2XPQ 041416

WH2XCR, as reported by WE2XPQ


WH2XCR VK4YB 041416

WH2XCR, as reported by VK4YB


WH2XCR VK3ELV 041416

WH2XCR, as reported by VK3ELV


WH2XCR VK2DDI 041416

WH2XCR, as reported by VK2DDI


WH2XCr JH3XCU 041416

WH2XCR, as reported by JH3XCU


In Australia, Phil, VK3ELV, and Roger, VK4YB, exchanged two-way reports with WH2XCR while Phil received additional reports from JH3XCU, JH1INM, and TNUKJPM.

VK4YB WH2XCR 041416

VK4YB, as reported by WH2XCR


VK3ELV WH2XCR 041416

VK3ELV, as reported by WH2XCR



VK3ELV, as reported by TNUKJPM


VK3ELV JH3XCU 041416

VK3ELV, as reported by JH3XCU


VK3ELV JH1INM 041416

VK3ELV, as reported by JH1INM


Today Jim, W5EST, examines the very interesting path to the East from KH6 in this discussion, entitled, “WH2XCR 2015-16 INTO EASTERN NORTH AMERICA & ZF1”:

“Today’s 630m 2015-16 season illustration depicts in brown the spikes of aggregated decodes along Hawaii’s WH2XCR paths east of the Mississippi River and to Cayman Islands’ ZF1EJ.

Eastern receiving stations included WG2XJM, VE3IQB, WH2XRR, WG2XKA, WA3TTS. Eastern transmitting stations who plowed a path to XCR this season included WG2XJM, WH2XXC, WH2XZO, WI2XBV. Thanks to all!  Please excuse any omission and let us know.

Like the 6300km to XCR-Japan, the 7400km XCR-XJM and 7800km XCR-ZF1EJ paths both exhibited spiky features. The XCR-ZF1EJ path has contributed significant numbers mainly since the beginning of 2016. Alone, the XCR- E N.Am. spikes would have a fairly level envelope throughout the season.  XJM receptions largely constitute those numbers.

Even if XCR-XJM numbers were shown separately, they would lack monthly or fortnightly periodicity. XCR-E N.Am. higher-activity dates have included 11/2,9, 11, 22; 12/2, 1/12,23; 3/1,5,28,30, 4/1,3,4,6,10.  Comparison with the dates of moon phases shows no connection.

Why were the XCR-JA decode spikes periodic (half-scale inset, upper left) but the XCR- E N.Am. spikes were not?  The XCR-JA and XCR-XJM paths share similar latitudes–Tokyo 36°N., Pittsburgh 40°N. After all, when I started this study I supposed all 630m long paths would be non-periodic!

True, the longer XCR path to eastern North America involves at least one ground surface reflection.  Pacific Ocean saltwater reflections ease XCR’s trip to Japan. Possibly, given higher path loss, the storm patterns in North America have been able to complicate the timing of the peaks somehow.  But the illustrated XCR- E N.Am. peaks did occur, and the peaks’ timing is non-periodic.  Maybe the periodicity in the XCR-JA decode-numbers was just a random anomaly if XCR-JA would perhaps have been non-periodic in other years. (XCR transmitted from Molokai for the first time last fall.)

This question of periodicity, and non-periodicity, remains an unsolved 630m mystery. Can your experience or station records inform the matter?  Let us know!”


W5EST 041416


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