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

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

Strong session with good domestic, trans-Atlantic and trans-Pacific openings as well as season-first trans-African reports between PA0A and FR5DH; N6PIG completes first JT9 QSO with W7IUV; JA3TVF first time reports at K9FD (/KH6); G0MRF reminds stations to get on the air and make a few QSO’s to ring in the new year!

– Posted in: 630 Meter Daily Reports, 630 Meters

The details for December 28, 2016 can be viewed here.

The UTC amateur registration database is here.

The current band plan used on 630 meters can be viewed HERE

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 QSO!


North America seemed very quiet during this session although I suspect that areas with lots of snow and other precipitation experienced significant static.  Parts of England and northern Europe were impacted by early morning storms and the system impacting the Mediterranean and parts of southern Europe continues to be the source of a lot of noise for those guys.  Central Japan is once again experiencing a few storms while a number of population centers in eastern Australia are in the clear for the moment.

11-hour worldwide lightning summary


Geomagnetic conditions are quiet. The Bz is pointing to the South this morning and solar wind velocities are averaging near 395 km/s. DST values remain at very good and stable levels, generally at or above the center line.




Propagation was excellent during the early and mid evening.  QSB was very low and domestic signals that are typically near the noise floor were in the clear.  Trans-Atlantic and trans-Pacific openings were good including first time reports in KH6 for at least one Japanese station.  The trans-African path was open for the first time this season.

Reverse beacon network reports follow:


David, G0MRF, posted the following comments on the RSGB-LF reflector and I think its a good idea in order to get stations on the air and actually operating.  The times have to be adjusted for North America but why not get on the air and make a few contacts, particularly WSPR operators that have never stepped outside of their comfort zone to actually operate on 630-meters:

Should we all make an effort to have some QSOs on 630m before the end of the year?  Saturday 30th December seems like a good date. A weekend but not new years eve.  Perhaps we could try to make a QSO or 2 between 15.00 (Sunset in EU) and 24.00 UTC.  Look forward to seeing a few signals below 475.600…..But if not.  HNY and good dx for 2018

Jim, W5EST, submitted the following screen capture of his WSJTx console showing JT9 activity observed at his station in Little Rock, Arkansas:

courtesy W5EST


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!):

John, WA3ETD, completed JT9 QSO’s with NC8W, WA1OJN, K8TV and VE3CIQ.

Ken, K5DNL, completed JT9 QSO’s with WB4JWM  and  NC8W.  Using WSPR overnight, Ken reported 24 stations and he received reports from 86 unique station including YV7MAE, K9FD (/KH6),  ZF1EJ and eight Canadian stations.

Larry, W7IUV, reported an initial JT9 QSO with N6PIG, a new station located in Washington state who is using a 40-foot vertical and 24-foot top hat.

Clint, KA7OEI, completed a JT9 QSO with W0YSE.  He also detected CW from KB5NJD during the evening.

Ted, KC3OL, completed a JT9 QSO with WB4JWM (JWM best -16 dB S/N / OL best -19 dB S/N).

Neil, W0YSE, completed a JT9 QSO with KA7OEI while operating at 1 watt.  Neil added that “My 1w WSPR was heard by 31 into AK, HI, NC, and OH this session.  hrd 10 on wspr, incl AK HI and K4SV.  a missed opportunity on JT9>……1354 -25 -0.1 1164 @  CQ KL7L BP51”

Eric, NO3M, reported late evening transcontinental JT9 CQ’s from N1VF:

“0617 -26  0.1  853 @  CQ N1VF CM87”

Tomi, JA3TVF, received first time DX reports using WSPR from K9FD.  Congrats Tomi!  JT9 next!

Albert, PA0A, reported a strong session with both trans-Atlantic and the first trans-African reports of the season:

Robert, KR7O, reported “Moderate western action last night with KA7OEI (569) and KB5NJD (detected) on CW.  New station K6PIG/7 was CQing on JT9 with not many takers.  K5DNL was copied CQing about 30 minutes before SS.  Good copy on KC3OL, WA9CGZ, NO3M, K2BLA and KL7L.  TC loggings on WSPR, W4BCX (9/-23), K4SV (64/-15), K2BLA (2/-18), KC4SIT (56/-17), W1IR (3/-25), W3LPL (-27)

ZF1EJ 9 spots, -26

K9FD 99 spots, -5

KL7L 77 spots, -10

VK4YB 2 spots, -24

Mike, WA3TTS, reported decodes of a DX station with a co-located domestic station which may show the power of the WSJTx suite to separate close or co-located signals.  As I related to Mike, this is the biggest spread of signals levels for two co-located signals that I am aware of where decodes occurred.  Mike offered the following comments and statistics:

Interesting observation overnight, I was able to decode K9FD with another station reporting being on the same frequency at the same time—although with some drift…

 This event occurred once over 10 K9FD decodes.  The other evening I saw the same thing happen with the same stations when watching the waterfall in real time. At the time I thought it was a
fluke, but it has happened again last night, so I thought it may be noteworthy

courtesy WA3TTS


It was a very good session at KB5NJD with very low noise and strong signals in North Texas.  I concentrated on CW, completing a 40-minute CW QSO with KF5RY, who is using 1-watt TPO and an 80-meter inverted vee configured as a Marconi-T from across town.  Following that QSO I received a call from Al, K2BLA, located in Florida.  Al was a strong and stable RST 579, allowing us to chat for the better part of fifteen minutes.  It was a blast and I look forward to doing it again. Al offered the following comments about his ‘modernized’ MOPA transmitter:

The MO, oscillator, operates at twice the output frequency continuously. So there is no chirp or drift. Then when the xmtr is keyed the frequency is divided by two with some flip flops and also creates a 25% duty cycle 180 degree drive for the power amp. The power FETs are driven by a FET gate driver that takes the logic level signals and can provide rapid rise time high current pulses to drive the gate capacitance. This circuit is usually used for a switching power supply or a motor drive. For spotting I enable the frequency divider but inhibit the FET drivers.

I used this technique 30 years ago for a xmtr in one of my books. Except the oscillator ran at 28 MHz and provided 20 meter, 40 meter and 80 meter outputs by dividing by 2, 4, and 8. It was a single ended output so I did not generate the 180 degree drive for a push pull amp.

That  QSO was followed by an initial QSO with Ralph, K8RYU, located in Ohio.  Ralph was the loudest that I have ever heard him since he began activity on 630-meters and had a very stable signal as we exchanged RST 549 both directions.  About twenty minutes later I received a call from Wayne, K9SLQ, who had a nice, strong signal.  We exchanged RST 559 / 569 reports and that was how the night went at my station.  As I related to Al, K2BLA, I really enjoy rag chewing on 630-meter CW so its nights like these where the band is stable and strong that make all the effort and toil through the Summer worth it.  I hope we enjoy a few more nights like this before the noise increases again.  As NO3M has recently stated, the band hasn’t gotten really good yet so we have a lot of room to grow.  I also received detection reports from KA7OEI and KR7O and W7IUV reported that I ranged from RST 449 to 549 during the evening.  A few reverse beacon network reports were registered during the evening.

Trans-Atlantic WSPR summary follows:




PA0A -> AA1A





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.

Hideo also reported a reception of JT9 from KL7L.  That screen capture can be viewed here.

Regional and continental WSPR breakdowns follow:

North American 24-hour WSPR activity


South American 24-hour WSPR activity


European 24-hour WSPR activity


African 24-hour WSPR activity


Asiatic Russian 24-hour WSPR activity


Japanese 24-hour WSPR activity


Indonesian 24-hour WSPR activity


Oceania 24-hour WSPR activity


Pascal, FR5DH, reported a remarkably distant WSPR signal from PA0A:

FR5DH session WSPR summary


Eden, ZF1EJ, reported 21 WSPR stations and he received reports from 53 unique stations including YV7MAE.  He shared two-way WSPR reports with K9FD.

ZF1EJ session WSPR summary


Martin, YV7MAE, reported five WSPR stations:

YV7MAE session WSPR summary


Laurence, KL7L, experienced a number of points of excitement during this session.  His JT9 was reported by W0YSE at -25 dB S/N at 1354z.  Robert, KR7O, indicated that he decoded what he believes was a message between KL7L and JH3XCU using JT9:

1350 -24 -0.1 1163 @  HELLO JH3XCU/

There was no QSO based on what has been reported so far but its great to see the openings occur.

Laurence has recently been operating parallel systems, which includes his main Marconi antenna operated as KL7L and a 30-foot tall vertical with a gull-wing style top load at just under 1W TPO with ground return coming from a connection to the hot water heater.  Laurence had to stop this arrangement, offering the following comments and details:

“well I’ve had to curtail the parallel QRP tx and main tx as there is just too much interaction between the two antennae even though they are around 100ft apart. I should have taken more notice of the main array scopematch but did see an increase in Rtot which in this case would mean more lossy capacitance – it wasn’t till I went to the garage and smelt some high temp component burning smell – yet to be found – did I put one and one makes two together as with the qrp tx turned off but the loading coil still connected, I brushed my fore finger against the top of the coil and received what I would call a 10W RF burn. It suddenly came to me why I had noticed the detuning – there was a huge amount of mutual coupling between the two antennas obviously and something to consider at these freqs, akin to using tuned loops close to Marconi’s, etc. but in this case it was a little extreme – I’ve knocked off the QRP test antenna and grounded it till I can take a look at the gear tomorrow but I’m guessing the heat smell may be coming from the tx LPF with the RF coming in from the other direction – probably not – but interesting in any case !! With the QRP antenna detuned the main array is showing nominal load/resonance now.”

courtesy KL7L


Nothing is ever easy.  I detune my resonant receive loops that are in close proximity to the transmit vertical for the very same reason.  Hopefully there was no damage to any hardware but this incident reminds us to be careful and even if we are taking care with high voltage and current on the main transmit antenna we also have to consider other resonant circuits nearby.

Using WSPR overnight, Laurence reported  nine stations and he received reports from 22 unique stations including  JH3XCU, JA8SCD5, JA1PKG and JA3TVF.  He shared two-way WSPR reports with K9FD and VK4YB.  Laurence added that he “…was up too early for about an hour on JT9 but no takers – JH3XCU had a decode so thats positive – apart from that still a little depressed for this time of year across the US – nothing on my JT9 screen overnight.

KL7L session WSPR summary


Merv, K9FD (/KH6) reported eighteen WSPR stations. including JA1PKG and JA3TVF.  Merv received reports from 46 unique stations including JA1PKG, JA3TVF, JE1JDL, JH3XCU, VK2XGJ and  VK3ALZ.  He shared two-way reports with VK4YB, KL7L and ZF1EJ.  Storms were present to the East of Hawaii but any increase in noise did not appear to impact Merv’s listening experience.

K9FD session WSPR summary


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