Radio: it's not just a hobby, it's a way of life

Current Operating Frequency and Mode

OFF AIR but will be QRV on CW somewhere between 472.5 kHz and 475 kHz after dark

SCHEDULED ACTIVITY: CQ 474.5 kHz CW by 1030z through sunrise most days, WX permitting

Band sounds less like Spring is approaching and more like early Winter in North America; Very early reports of WH2XCR at VK2XGJ; WG2XSV –> WG2XJM; Upcoming portable activity from G0MRF

– Posted in: 630 Meter Daily Reports, 630 Meters

The band continues to impress as the northern hemisphere progresses into late Winter and spring thunderstorms begin to impact the noise floor.  Last night was quite good with very low noise levels allowing me to continue to listen on the transmit vertical.   High activity did not hurt matters either.  This season has been impressive as the number of “new” reporting stations has been significant.  Many people have received their first taste of 630-meters from WSPR, others participated in the activity nights, and even a few of those have applied for their own Part-5 experimental licenses so they can prepare their stations and “learn the ropes” as we wait for the FCC to implement the band under Part-97.  These are good times to be a medium wave operator.

The geomagnetic field was quiet, the Bz was stable, pointing slightly to the North, and solar wind velocity was less than 400 km/s, in the low category.  Maybe its almost surprising that the band was as good as it was with such calm conditions.

planetary-k-index 022816


Kyoto DST 022816


Australia 022816


David, G0MRF, reports the results of a recent test and announces an upcoming portable operation from a commercial tower site:

G0MRF email 022816


G0MRF beacon test site 022816

David’s portable operations site


U3S G0MRF 022816

David’s U3S and modified 137 kHz transmitter to work on 472 kHz


G0MRF beacon data 022616

David’s test beacon data using the lower antenna


John, WA3ETD / WG2XKA, reported strong domestic band condition over night and offered the following comments and band map:

WG2XKA report 022816


WG2XKA 022816

WG2XKA session WSPR activity


Doug, K4LY / WH2XZO, sent this report of his stations activity during the session.  Note that the station mentioned as providing extremely high S/N reports has been contacted to determine specifics about the hardware in use.  Its the belief of many that he is utilizing narrow bandwidth to generate such strong reports.  Doing so is not a problem but it helps in data analysis for us to know that the standard USB bandwidth is not being used.

WH2XZO 022816

Neil, W0YSE/7 / WG2XSV, indicates that he was heard as far East as Eric, NO3M / WG2XJM, in Pennsylvania in addition to hearing six unique stations and being heard by 21.

WSPR activity was high, with 77 MF WSPR stations observed at 0130z on the WSPRnet activity page.  VE6QPT was observed making spots.  I cannot confirm whether this was his first night or not but it was the first time that I recall seeing his call sign.  Another station, presumably an SWL, was active:  ZO1TAN in Portland, Oregon.  While this station did not have any MF reports for the session, he is apparently active on the WSPRnet forum.  If you know him or know how to contact him, we would be interested in knowing what his station hardware is.

Regional and continental WSPR breakdowns follow:

NA 022816

North American 24-hour WSPR activity


EU 022816

European 24-hour WSPR activity


VK 022816

Australian 24-hour WSPR activity


JA 022816

Japanese 24-hour WSPR activity


There were no trans-Atlantic or trans-African reports during this session.  EA8/DL9XJ, UA0SNV, and W6SJP/BY were all present during the session but had no reports in the WSPRnet database.

In the Caribbean, Eden, ZF1EJ, and Roger, ZF1RC, experience an almost identical night of good reports from stations in North America.

ZF1EJ 022816

ZF1EJ 24-hour WSPR activity


ZF1RC 022816

ZF1RC 24-hour WSPR activity


In Alaska, Laurence, KL7L / WE2XPQ, was only receiving during this session.

WE2XPQ1 022816

WE2XPQ/1 24-hour WSPR activity


WH2XCR WE2XPQ1 022816

WH2XCR, as reported by WE2XPQ/1


In the Pacific, Merv, K9FD/KH6 / WH2XCR, received early reports from John, VK2XGJ.  Merv notes that he got a bit of a late start and was fortunate to begin transmitting in time to receive these very early evening reports in Australia.  The path to Japan remains cut off.

WH2XCR 022816

WH2XCR 24-hour WSPR activity


WH2XCR VK4YB 022816

WH2XCR, as reported by VK4YB


WH2XCR early VK2XGJ 022816

WH2XCR, as reported by VK2XGJ



In Australia, Phil, VK3ELV, and Roger, VK4YB, received the following reports from  WH2XCR during this session:

VK4YB WH2XCR 022816

VK4YB, as reported by WH2XCR


VK3ELV WH2XCR 022816

VK3ELV, as reported by WH2XCR



Additional anecdotes, statistics, comments and information:

Roger, VK4YB, a recent convert to 630-meters, has information about his antenna system posted on his QRZ page.

Jim, W5EST, provides Part I-A in a series of discussions on the topic of daytime propagation on 630-meters:


Is 630m daytime prop perhaps just due to low sun elevation in temperate latitudes away from the aurora zone and within plus/minus several weeks of winter solstice?  Maybe 630m daytime prop is just due to a decline in D-layer absorption in months when the sun is low in the sky.

I’ve added some predictors to TABLE 2 using calendar intervals. False Negatives Rate and the Precision are computed for all of these predictors of 630m daytime prop. The best predictor among them is “Nov-Jan15.” Based on the 4 months of data on hand, it satisfies the 630m prediction quality goal I offered on Feb. 25.

If a USA station followed this “Nov-Jan15” predictor and activated in daytime all the days Nov. 1-Jan. 15, 630m daytime prop would happen more than half the days predicted positive. The station would miss fewer than 1 in 10 daytime prop days by going off in daytime on the 47 days that the predictor calls negative in the last 4 months. (47 days is 123days less 76 days predicted positive).

Let’s do remember such calendar-based predictors while keeping John XIQ’s dictum in mind: We don’t have data for other times of year, not to mention other years, so let’s not jump to conclusions about strong months of daytime prop itself too soon.

Tomorrow, let’s compare what we’ve learned so far with solar flare satellite data from GOES-15.”


W5EST table 022816


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