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Current Operating Frequency and Mode

OFF AIR; QRT Thursday night but back Friday morning by 1100z

Significant improvements in propagation and lower QRN overall as the session progresses; WH2XZO –> G8HUH @ -7 dB S/N; WH2XGP –> VK2DDI, VK2XGJ

– Posted in: 630 Meter Daily Reports, 630 Meters

What started as a noisy session actually improved  as the evening progressed.  The consensus during the evening in North America was that the band was better than the previous session at the same time.  My impression from here in Texas during the same time frame was that the band was slow to open but I was located at “ground zero” for storm activity so my perspective was skewed as intense lightning stretched from Texas to Georgia.

Geomagnetic activity was elevated but remained quiet.  The Bz was variable but pointing South this morning.  Solar wind velocity is elevated above 400 km/s and Solarham is forecasting storm levels in the coming days.

planetary-k-index 041216


Kyoto DST 041216


Australia 041216


Doug, K4LY / WH2XZO, reports a CW level decode of his signal by G8HUH.  I tend to believe the report is real as all of the data appears to be in order.  Doug offers these comments:

WH2XZO 041216


Larry, W7IUV / WH2XGP, reports that he decoded eight WSPR stations and was decoded by 33 unique stations including VK2XGJ and VK2DDI.  He also notes that he operated at 14% transmit cycle during the session which may account for fewer reports than normal.

WH2XGP VK2DDI 041216

WH2XGP, as reported by VK2DDI


WH2XGP VK2XGJ 041216

WH2XGP, as reported by VK2XGJ


John, WA3ETD / WG2XKA, operated a QRP session with his new beacon transmitter.

WG2XKA email 041216


WG2XKA 041216

WG2XKA session WSPR activity


Neil, W0YSE/7 / WG2XSV, had a great session at QRP ERP levels!

WG2XSV 041216


WSPR activity was high with 76 MF WSPR stations observed on the WSPRnet activity page at 0230z.  K3DY was observed as a new or newer stations.  This call sign sounds familiar but I can find no previous 630-meter reports from this station.

Regional and continental WSPR breakdowns follow:

NA 041216

North American 24-hour WSPR activity


EU 041216

European 24-hour WSPR activity


JA 041216

Japanese 24-hour WSPR activity


VK 041216

Australian 24-hour WSPR activity


Eden, ZF1EJ, once again provided solid reports for several US stations during the session.  There existed a very real wall of lightning noise across the southern US so its remarkable that he heard anything.

ZF1EJ 041216

ZF1EJ 24-hour WSPR activity


There were no reports on the trans-African path during this session.  UA0SNV was present from Asiatic Russia but no reports were found in the WSPRnet database.

As previously reported, WH2XZO, received a very low S/N report, CW levels, actually, from G8HUH for the sole trans-Atlantic report for the session.

WH2XZO G8HUH 041216

WH2XZO, as reported by G8HUH


Laurence, KL7L / WE2XPQ, received reports from the western portions of North America plus two-way reports with WH2XCR in Hawaii.

WE2XPQ 041216

WE2XPQ 24-hour WSPR activity


WE2XPQ WH2XCR 041216

WE2XPQ, as reported by WH2XCR


Merv, K9FD/KH6, is reported by right up to his sunrise by VK2XGJ and VK2DDI and continues to have two-way reports with VK4YB and VK3ELV.  The path to Australia appears to peak earlier in the session.  John, VK2XGJ, provided a screen shot (shown below) of his WSPR console showing numerous high S/N reports for Merv’s signal very early in the evening in Australia.  He notes that “The receiver is my dear old WJ 8718a and #1 Mini-whip.”  Mainland activity was typical including reports from WG2XJM.  The salt water path to and from WE2XPQ continues to be strong.

WH2XCR 041216

WH2XCR 24-hour WSPR activity


VK2XGJ 041216

VK2XGJ WSPR console with early, strong reports for WH2XCR


WH2XCR VK4YB 041216

WH2XCR, as reported by VK4YB


WH2XCR VK3ELV 041216

WH2XCR, as reported by VK3ELV


WH2XCR VK2XGJ 041216

WH2XCR, as reported by VK2XGJ


WH2XCR VK2DDI 041216

WH2XCR, as reported by VK2DDI


WH2XCR WE2XPQ 041216

WH2XCR, as reported by WE2XPQ


In Australia, Phil, VK3ELV, and Roger, VK4YB, experience two-way reports with WH2XCR.  Phil received additional reports from JH3XCU which were from both late in the session yesterday as well as today.  The trend appears to be that the JA path is better later in the session this time of year which is different from the path to KH6, which has been better earlier in the session.

VK4YB WH2XCR 041216

VK4YB, as reported by WH2XCR


VK3ELV WH2XCR 041216

VK3ELV, as reported by WH2XCR


VK3ELV JH3XCU 041216

VK3ELV, as reported by JH3XCU


Here is Part 5 in a series from Jim, W5EST, entitled, “SLIDING WINDOW APPROACH TO XCR-JA 2015-2016”:

“Today, let’s look at the graphical illustration of the 630m North Pacific path from Hawaii to Japan and compare it with the 630m transatlantic (TA) experience this season.

The 630m community can enthusiastically thank the 630m stations and SWLs involved. WH2XCR, JA1NQI, JA1PKG, JA5FP, JA8SCD, JE1JDL, JF1LKS, JH1INM, JH3XCU, JN1MSO, 7L1RLL, TNUKJPM, EJTSWL.  If I’ve omitted any contributor to this effort, please let me know so we can correct the list.  These stations and WE2XPQ, WH2XGP, WI2XBQ, VE7BDQ, VE7SL and VK3ELV, VK5ABN, VK4YB, VK2DDI, VK2XGJ, VK7TW have successfully tested various 630m paths in the Pacific region and I’ll focus on HI-JA here.

Referring now to the illustration*, see numbers of XCR-JA decodes in blue. The red curve shows filtered results by using a one-week triangular sliding window on the XCR-JA data.  No logarithms are applied.

Like TA, XCR-JA decode behavior is spiky and suggestively periodic.  At that point the similarities end.  Unlike TA’s monthly periodic content, XCR-JA spikes repeat about every two weeks.

TA decodes were very numerous in the fall and have become less numerous.  XCR-JA decode spikes have a bell-shaped envelope instead– rising from autumn into winter and then becoming less numerous in the spring.

Now refer to the upper left inset graph.  It compares a one-week triangular sliding window rendition of North Pacific decodes (blue & red) with the corresponding rendition of TA decodes (green).   Notwithstanding their N. Hemisphere ocean paths, TA peaks generally occurred when XCR-JA decodes have been few, and vice-versa.

Varying numbers of RX stations active in the various regions over the season may be involved in the differences of the graphs.  Especially since December, however, the distinct difference of high TA at moments of low XCR-JA appears noteworthy.

Thanks to all the 630m contributors at TX and RX ends.  GL the rest of the season!

*Note: The data source is my running 630m data collection from the WSPR database assembled from the beginning of the season last fall.  I rechecked my data against reports given in this blog for the dates Jan. 24-April 11, 2016.”

W5EST 041216



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