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Current Operating Frequency and Mode

OFF AIR for storms, probably for much of the week if the forecast holds

G1 storm conditions return but trans-Pacific openings continue to be pretty good for North America on the last day of 2016/2017 season; Great domestic conditions including transcontinental openings; W5EST presents: ”August 12-16 Day/Night 630m Path Absorption: XXP-N6SKM”

– Posted in: 630 Meter Daily Reports, 630 Meters

The details for August 31, 2016 can be viewed here.

IMPORTANT REMINDER: Neither 630-meters nor 2200-meters are open to amateurs in the US yet. That includes stations using fake or pirated call signs. Please continue to be patient and let the FCC finish their processes. UPDATED: Click here to view the proposed “considerate operators” frequency usage guide for 630-meters under Part-97 rules that was developed with the input of active band users.

The Gulf coast was the focal point for most noise in North America as the remnant of Hurricane Harvey progresses East and Northeast.  The West experienced what has become typical evening storms that lingered into the overnight and morning.  It was significantly noisier during the evening than this morning, at least here in North Texas.  Another tropical storm was reported to possibly be forming in the Atlantic.

11-hour North American lightning summary


Geomagnetic conditions reached G1 storm levels this morning. The Bz is pointing to the North this morning and solar wind velocities are averaging near 640 km/s.   DST values exhibited a very nice peak before decreasing rapidly at the onset of storm conditions.  Protons were elevated during early hours of the new session yesterday in excess of 20 protons / cc.




Neil, W0YSE/7 / WG2XSV, reported that he was decoded by twenty unique stations while running only 200mW ERP.  He provided reports for eight WSPR stations including VE7BDQ, WD2XSH/26, WG2XIQ, WG2XXM, WH2XCR, WH2XGP, WH2XXP and WI2XBQ.  Neil indicates the he “…received 23 spots from Merv/XCR with a best of -17 report, and 7 spots from Laurence’s XPQ with a best of -22…Lots of activity all up and down the west coast of NA overnight.”

Doug, K4LY / WH2XZO, reported “Drizzle, rain, and moderate noise all night and expected to continue until Saturday. SWR stayed low enuf to xmit, but only 9 decoded and 30 who decoded XZO.”

David, N1DAY / WI2XUF, reported:

“I was off to a good start last night, but an after midnight file update from HP shut WSJT-X down and I lost 5 hours of prime transmission time.  In spite of that, I ended up with 29 spots (9 RX, 20 TX) and 8 of my TX spots were greater than 1000 KM.  I have attached 2 pictures showing the base of my antenna with the relay that allows me to switch the inductor coil and my 160-6m remote turning box in and out of the circuit. I have the option of using my inverted L for receive, or switching the coil in and out of the circuit for use as a single antenna for both TX and RX on 630M as well.

The caged vertical portion at 70 feet makes a great multiband antenna.  The second picture shows what passers by see from the street.  Everything has to remain hidden as the HOA does not allow antennas.  It took over a month and several dozen lead sinkers to get the 6 horizontal wires positioned 60-70  feet up without interference from the trees.  I have become pretty good with a slingshot in the process.”

Al, K2BLA / WI2XBV, indicated moderately high noise that decreased rapidly at sunrise.  He provided reports for  nine WSPR stations this morning.

Mike, WA3TTS, reported:

“Another evening of reasonably good continental reception, but no T/A or T/P in wspr2.  I did listen in the LW BC band around 0200~0230 and was able to hear Medi1 (171kHz) Euro1 (183 kHz), Iceland (189 kHz), BBC R4 (198 kHz) and a station with music on 252 kHz (Ireland??) at levels up to Q3 and Q4 for durations of up to several minutes.  During this time period WH2XXC was very strong at times, with SNRs of +7 to +11. In the past. a good indicator of T/A potential for me has been exceptionally strong signals from XKA or XXC—perhaps the last iono bounce for wspr2  T/As need to be an efficient ones for an inland signal decode of wspr stations…

WH2XGP      31 decodes, best -13 @ 0532   min -24 @ 0954
WH2XXP       81 decodes, best  +3 @ 0600  min  -22 @ 1100
ZF1EJ            19 decodes, best   -20 @ 0224 min  -24 @ 0206
WG2XIQ        8  decodes, best  -8 @ 1038  min  -22 @ 1054
WG2XXM    139 decodes, best  +10 @ 0528  min -28 @ 0510
WD2XSH/15  33 decodes, best   -12 @ 0526 min  -22 @ 1036
WI2XSV        62 decodes, best   +5 @ 0302 min  -26 @ 0252
WH2XZO      83 decodes, best   +3 @ 0234  min  -25 @ 0402
WI2XUF       72  decodes, best   -5 @ 0356 min  -24 @ 1032
WH2XXC     90  decodes, best   +11  0216 min  -28  @ 0118

Also 118 WH2XND decodes from 0248 to 1148 UTC, best -16 @ 0304,  min -32 @ 1148.  First two decodes of XND I had the antenna pointed NE, then switched NW for duration of evening..  I also had a PC crash and missed XND 0754 to 0806, for some completely uncanny reason I woke up, checked the radio station, found the PC shut down, did a reboot, and got WSPR-X running again on 2200m all within 12 minutes.  So I missed one or two handfuls of XND decodes overnight, which caused the success rate to fall below 90%…”

Trans-Pacific report details, excluding KL7 and KH6, can be viewed here.

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

Roger, VK4YB, indicated that “630m propagation in VK was not as good as the map might suggest. Reports along the East coast were well down on normal but up to +8 dB with VK6LX in the West. Very strange.  Also when reports from VK2,3 did improve, the DX reports improved as well, indicating variable absorption at the VK end.”  He received reports from JA3TVF, JH3XCU, KJ6MKI, KK6EEW, N6GN, VE6JY, VE6XH, VE7BDQ, W6SFH, W7IUV, WD2XSH/26, WE2XPQ and WI2XBQ. He shared two-way reports with WH2XCR.

Jim, ZL2BCG, received reports from VE6XH, VE6JY, KK6EEW, N6GN, VE7BDQ, W6SFH, W7IUV, WD2XSH/26, and WE2XPQ.  He shared two-way reports with WH2XCR.

Ken, K5DNL / WG2XXM, reported that he decoded ten WSPR stations and he received reports from 52 unique stations including VK4YB, ZL2BCG, ZL2AFP, WH2XCR, ZF1EJ and five Canadian stations.  Ken added that he shared two-way reports with ZF1EJ and WH2XCR as band conditions improve.

Joe, NU6O / WI2XBQ, provided reports for seven WSPR stations and he received reports from 26 unique stations including ZL2AFP, ZL2BCG, and VK2XGJ.  He shared two-way reports with VK4YB.  Joe indicated that he received “Single digits to WH2XCR most of the night.”

Ward, K7PO / WH2XXP, received reports from 61 unique stations including EJTSWL, VK2EIK, VK2XGJ, VK3ALZ, VK4YB, VK5AKK, VK7TW, ZL2AFP, ZL2BCG and ZL4EI.

WH2XXP 24-hour WSPR activity (courtesy NI7J)


Larry, W7IUV / WH2XGP, provided reports for nine WSPR stations and he received reports from forty unique stations including ZL2AFP, ZL2BCG and WH2XGP.   As W7IUV, Larry provided reports for eleven WSPR stations including VK4YB and ZL2BCG.

WH2XGP 24-hour WSPR activity (courtesy NI7J)


Paul, W0RW / WA2XRM, reported on the 600-meter research group email reflector that he has two T225A-2 red cores  and one T200-3 Grey core.  These are powdered iron.  He also has the following high-voltage capacitors:

1 – Faradon  UC33440,  .004 MFD, 12KV, 5″ Dia,  4 ” high.
2 – Sangamo Mica Cap, .005 MFD, about 5 HV, 2″ x 3″ x 2.5″.
1 – Sangamo Mica Cap, 100 pF, about 5 HV, 2″ x 3″ x 2.5″.

You can contact Paul at this email address.

The workaround reported yesterday that allows RF from the receive only antenna bus to reach the receiver continues to work very well and the change even simplifies my procedures when switching from 160-meters to 630-meters and visa versa.  I called CQ on 474.5 kHz CW through the sunset period while testing a second  short vertical receive antenna that will ultimately be phased and combined into an array.  So far, so good.  I QRT’ed at bedtime with the plan that I would call CQ again this morning but circumstances were such that I opted instead to fire-off  several WSPR transmissions which yielded pretty good results for low power.  I increased the transmit cycle to 33%, however, which artificially increased my report counts.  I operated WSPR from 1018z through sunrise at 1201z.  Reports values and counts dropped significantly twenty minutes before sunrise but rebound just prior to sunrise.  I don’t observe many sunrise peaks on 630-meters.  My transmission report details can be viewed here and my reception report details can be viewed here.

WG2XIQ 2-hour WSPR activity


Regional and continental WSPR breakdowns follow:

North American 24-hour WSPR activity


South American 24-hour WSPR activity


Asiatic Russian 24-hour WSPR activity


Japanese 24-hour WSPR activity


Oceania 24-hour WSPR activity


Eden, ZF1EJ, provided reports for six WSPR stations. He received reports from 22 unique stations including WH2XCR.

ZF1EJ 24-hour WSPR activity


Laurence, KL7L / WE2XPQ, has returned to a receive-only capacity following a power outage that took a PC off line.  Laurence indicates that high winds or possibly wildlife (or a combination of the two!) may have damaged his transmit antenna, however.  He  provided reports for eight WSPR stations including WH2XCR, VK4YB and ZL2BCG.  DX report details can be viewed here.

WE2XPQ 24-hour WSPR activity


Merv, K9FD/KH6 / WH2XCR, provided reports for twelve WSPR stations including VK3HP, VK5ABN and ZF1EJ. He shared two-way reports with VK4YB and ZL2BCG. Merv received reports from thirty unique stations including WE2XPQ, EJTSWL, JA1NQI, JH3XCU, VK2EIK, VK2XGJ, VK3ALZ, VK7TW,  ZL4EI and ZL2AFP.  DX report details can be viewed here.

WH2XCR 24-hour WSPR activity


Jim, W5EST, presents, “AUG. 12-16 DAY/NIGHT 630M PATH ABSORPTION: XXP-N6SKM”:

“Occasionally during the year, I’m blogging WSPR2 SNR on the short AZ-CA path from WH2XXP to N6SKM.  For Nov. 30, 2016, see:  http://njdtechnologies.net/120116/  For June 18-28, 2017, go to: http://njdtechnologies.net/070317/

Today’s illustration for Aug. 12-16 shows quite similar 630m propagation along this path for each of the five days.  Pre-sunrise nighttime 630m SNRs became generally elevated clusters (arrows) compared to the rest of the night.  Given much variation within the clusters, the pre-SR elevated SNRs lasted for as much as an hour or two before sunrise SR.

Relative to the 630m pre-SR regime, SNRs dropped precipitously about 45 dB around sunrise to daytime levels -29dB or weaker.  Even though these stations were operating all day, as indicated by isolated midday decodes 18z-19z on two of the days, most daytime transmissions failed to decode.  That suggests that XXP daytime signal strength was languishing in the -30s for most of daytime.   What an extreme dynamic range for a path that supported +18 dB SNR before sunrise on one of the days!

Now please consider the zigzag areas the red ovals indicate.   Within a few minutes after sunrise“SR” (positioned next to its corresponding SNR), there occur significant but very temporary recoveries of several dB SNR.  These may be associated with self-shadowing in the D-region causing such “ski-jump SNR”  http://njdtechnologies.net/073117/  Or the brief SNR prominences may involve some other as-yet-unpredictable post-SR bump dynamics.

Either way, if 630m operators ever become able to do QSOs in the regime around and after SR, they will be the “surfers of the ionosphere”!  TU & GL!”



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