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As has been the case for much of this winter's DX season, LF conditions were very erratic during this past weekend's CLE NDB-listening event.



Geomagnetic activity fluctuated wildly from hour to hour, gradually settling down for Sunday night's last opportunity, with K-indices dropping to 1's or Ø's.

courtesy: http://www.solarham.net/planetk.htm

With the DST slowly climbing towards positive numbers after a week of coronal hole streaming and auroral absorption, I had hoped that Sunday night's conditions would be a bit better than they were ... although poor, it was the better of the three nights.

courtesy: http://wdc.kugi.kyoto-u.ac.jp/dst_realtime/presentmonth/index.html

Participants in the central and southern states noted excellent conditions and were not as badly affected as listeners to the north, where the effects of any auroral activity are sudden and much more severe ... I'm always surprised at just how much difference one or two hundred miles further to the south can make.

The following NDB's were heard over the course of the weekend, all using the Perseus SDR to record two-minute grabs, every hour, from dusk through dawn. Going over the recordings takes some time but being able to, in effect, listen all night, readilly illustrates how much the band conditions on LF can change so drastically from hour-to-hour ... sometimes for better and sometimes for worse.

25 11:00 350 VTR McGrath, ALS
23 05:00 350 SWU Id Falls, ID, USA
23 05:00 350 RG Oklahoma City, OK, USA
25 10:00 350 RB Resolute Bay, NU, CAN
23 05:00 350 ON Agate, OR, USA
23 05:00 350 NY Enderby, BC, CAN
24 13:00 350 DNS Denison, IA, USA
24 10:00 351 YKQ Waskaganish, QC, CAN
23 05:00 351 AE Paradise Hills, NM, USA
23 09:00 352 RG Rarotonga, CKS
25 10:00 353 ZXY Whitehorse, YT, CAN
23 05:00 353 RNT Renton, WA, USA
23 04:00 353 PG Portage La Prairie, MB, CAN
23 08:00 353 LLD Lanai, HWA
24 09:00 353 IN Ericsburg, MN, USA
23 08:00 353 DI Dickinson, ND, USA
23 05:00 353 CY Cheyenne, WY, USA
23 05:00 353 AL Dixie, WA, USA
23 08:00 353 5F Chevron, AB, CAN
24 07:00 355 YWP Webequie, ON, CAN
25 14:30 355 AUB King Salmon, ALS
23 08:00 356 ZXE Saskatoon, SK, CAN
23 08:00 356 ZF Yellowknife, NT, CAN
23 11:00 356 PND Portland, OR, USA
23 08:00 356 ON Penticton, BC, CAN
25 11:00 356 ODX Ord, NE, USA
23 08:00 356 MEF Medford, OR, USA
24 11:00 358 YKG Kangiqsujuaq, QC, CAN
23 05:00 359 YQZ Quesnel, BC, CAN
23 05:00 359 YAZ Tofino, BC, CAN
23 05:00 359 SDY Sidney, MT, USA
24 13:00 359 GGF Grant, NE, USA
23 05:00 359 BO Ustick, ID, USA
24 11:00 360 SW Warroad, MN, USA
25 13:00 361 HI Holman, NT, CAN
23 08:00 361 E3 Wabasca, AB, CAN
25 10:30 362 YZS Coral Harbour, NU, CAN
23 08:00 362 RPX Roundup, MT, USA
23 09:00 362 OWP Sand Springs, OK, USA
23 08:00 362 BF Seattle, WA, USA
23 08:00 362 6T Foremost, AB, CAN
23 10:00 364 4D Helmet, BC, CAN
25 07:00 365 PAL Palma, EQA
23 05:00 365 MA Mayo, YT, CAN
23 05:00 365 HQG Hugoton, KS, USA
23 05:00 365 DPY Deer Park, WA, USA
23 06:00 365 AA Harwood, MN, USA
25 10:00 366 YMW Maniwaki, QC, CAN
25 11:00 366 PNI Pohnpei, FSM
25 10:00 366 EOK Keokuk, IA, USA
25 11:30 367 R5 Pukatawagan, MB, CAN
23 08:00 368 ZP Sandspit, BC, CAN
23 08:00 368 VX Dafoe, SK, CAN
23 08:00 368 SX Cranbrook, BC, CAN
25 11:00 368 SOY Sioux, IA, USA

It will be nice to see a 'quiet sun' once again, hopefully sooner than later. For such a wimpy solar cycle, this one is not going down without a valiant fight, as it continues to mess-up LF and MF propagation, with an almost non-stop bombardment of coronal hole streams.

As much as I love CW and try and promote its use on 630m, one cannot deny the growing interest and use of the WSPR mode on our newest ham band.



Its ability to dig deep into the noise and successfully decode signals as weak as -30db makes it an attractive method of watching the night-to-night and hour-to-hour propagation magic.

One only needs to check the number of stations logged into the WSPRnet Activity-page, uploading 630m spots each night ... a typical evening will see 60-80 calls listed.

The main problem with WSPR is that it's a one-way, beacon-only mode and it's not possible to utilize it for a valid two-way contact. It's nice to know that station 'A' is able to hear station 'B', and vice-versa, but the only way for both stations to know this is for them to both be monitoring the internet uploads ... if both stations were able to confirm their respective receptions all via radio, then a two-way contact could be claimed. Thankfully, there is another mode that solves this dilemma, without internet intervention and that's JT9.

JT9, developed by K1JT, is a spin off from his JT65 weak signal QSO-mode software developed for EME. JT9 has been tailored for the noisier HF and MF bands and is apparently, about 2db more sensitive than JT65. In the past, I have made several single-yagi EME contacts on 2m using JT65, with many of these QSO's being in the -27 to -29 db range. This would suggest that 630m JT9 contacts could be made at signal levels as weak as -30db!

A recent "630m Activity Weekend" in Europe turned out be a "630m JT9 QSO Party" with dozens of Europeans working each other throughout the event using this weak signal mode with great success. It looks very much as if JT9 may now be the go-to mode for two-way work on 630m when, as is often the case, signals can be easily seen on a visual waterfall display, but are too weak to be heard on CW.

DC1RJJ's 630m JT9 action courtesy: KB5NJD

On this side of the Atlantic, recent JT9 contacts have been made between several of the U.S. experimental stations. WH2XCR in Hawaii (K9FD/KH6) and WG2XIQ in Texas (KB5NJD) worked on Dec 9th, while WH2XGP (W7IUV), WG2XSV (W0YSE/7) and others have been exploiting the power of JT9 to work around the country.

Such has been the case for me recently, with the arrival of VE3OT on 630m. Since beginning his nightly slow speed CW, QRSS6 beaconing, his signals have been easily visible here every night but only strong enough to hear aurally, on two occasions.  It is likely that we could work each other fairly routinely on JT9 but will need to wait for very good conditions to work on CW.

The good thing about modes such as WSPR and JT9 is that they can be used without the need for linear amplifiers in the PA ... class D or E amplifiers, fairly universal in the LF/MF world, can be employed. The most popular route at present seems to be via a homebrew  transverter that will allow the use of the station's main HF transceiver (using the tone-generating JT9 / WSPR software) to generate the required 630m RF.

I've been looking for a new radio workbench project to catch my interest and building a 630m transmitting converter is beginning to look more attractive, now that we have another DX target in VE3 land ... of course, if and when the U.S.A. gets the band, there will be an entire new crew of stations spread across the continent to keep the transverter busy!

Following late fall's very successful 630m Activity / CW Crossband Weekend in November, several enquiries were soon received asking "when's the next one?" I'm happy to announce that the 'next one' will be held on the first weekend of February and will follow a similar format. 

Here is the formal press release describing the event published in the ARRL News:


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US and Canadian radio amateurs and experimenters will join forces in February for the first Midwinter 630 Meter Activity Weekend. The event will get under way on February 6 at 0000 UTC (Friday, February 5, in US time zones) and run through 2359 UTC on February 7.

“This event is being undertaken because of the new and quickly growing interest in present 630 meter activities, both in the US and Canada,” said  ARRL 600 Meter Experimental Group (WD2XSH) Experiment Coordinator Fritz Raab, W1FR. “Much of the interest is in response to the strong likelihood of US amateurs receiving access to the band in the near future, while Canadian hams are eager to learn more about the present level of Amateur Radio activity on their newest ham band.” The activity weekend comes on the heels of a special event operation over the November 13-14 weekend that included participation by US and Canadian radio amateurs.and the Maritime Radio Historical Society (MRHS).

Raab said the two activity nights will offer interested amateurs in both countries an opportunity to experience the 630 meter band and, through cross-band activity with Canadian amateurs, to take part in activity in the MF spectrum. “Our hope is to see this activity become an annual operating event, to be held very winter on the 630 meter band,” Raab said. “For those who may be building for future 630 meter operation, this event will provide an opportunity to test your ‘receive’ capabilities on MF.”

Operation will be from 472 kHz to 479kHz in various modes. The two-way crossband work will be undertaken by several Canadian stations, all on CW. Canadians will operate on a schedule and listen for callers on specific QSX frequencies in the US ham allocations.

Several US Experimental stations also will be in operation throughout the band, in two-way QSO mode with each other, using CW, PSK31, JT9, and QRSS modes. Some stations will also use WSPR and QRSS CW beacon modes.

“The success of this event largely depends upon the participation of as many amateurs as possible,” Raab said. “We hope that you can find a few hours to participate in this unique midwinter event.” Submit reception reports via e-mail to the respective operators or via the ARRL 600 Meter Experiment website.
   

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Hopefully you will be able to participate in the crossband activity by being able to listen on 630m and then able to switch over to HF to transmit. This could involve the use of a separate receiver / transmitter or can often be easily implemented via your transceiver's 'A/B' switch.

No antenna for receiving on 630m? Surprisingly good results can often be had by using a low band wire antenna such as a dipole or inverted-L for listening on 630m ... the antenna does not necessarily need to be resonant. In fact, often times, a non-resonant receiving antenna can provide a better overall S/N ratio than one which is resonant, as these often gather more noise along with signals.

You may want to experiment before hand by listening to many of the numerous U.S. experimental stations operating nightly, mostly in the WSPR mode, between 475.6 and 475.8kHz. Most operators provide a CW identifier following their WSPR transmission but a better way to decode these signals is by installing the latest WSPR software, WSJT-X (freeware), at K1JT's website here. The software works extremely well and is easy to install and get working. If you set the software to 'upload spots', you can share your nightly catches with dozens of other listeners throughout the continent on the WSPRnet website.

courtesy: KB5NJD's 630m Daily Blog

I'll be sending out a few more reminders as the 630m Activity Weekend gets closer but please mark your calendars and make a date to participate, by either sending in your 'heard' reports or by getting on-the-air and working some of the Canadian crossbanders.

courtesy: https://www.google.ca/maps

 Another new Canadian station has been activated on 630m ... VE3OT, Mitch, in London, Ontario.




For many years, Mitch has been running his QRSS 'MP' beacon on 2200m, using a large E-W wire loop and about 200 watts.

The move to 630m uses the same transmitter with a retuned loop and new output LPF. Although the antenna tuner still needs a capacitor swap and a new toroid to perfectly resonate the loop, Mitch has been getting many good 'audible' reports from eastern stations as well as from the central states and as far south as Texas.


Present testing is in the QRSS6 CW mode on 475.0 kHz. Unfortunately, since moving up to 630m, E-W propagation has been hit and miss and although I can copy his QRSS6 CW signal, I have not had aural copy as of yet ... maybe tonight.

courtesy: http://www.solarham.net/

Hopefully when the geomagnetic field calms down again, Mitch can work some of the VE7's out this way on CW ... wouldn't that be a nice way to start the New Year!

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Another 630m CW crossband activity has been planned for early February and I will have more details shortly. If you missed the last event, here is another chance to get in on the two-way crossband fun ... please stay tuned!

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The CLE 200 event this past weekend once again delivered mediocre propagation on all three evenings. In spite of Sunday night's G1-class geomagnetic storm and high K values, Sunday's overnight period proved to be the best of the weekend's generally 'below average' conditions ... this is the time of the year that LF propagation is usually at its best. Thankfully, there are still several months ahead that could offer some really great mid-winter prop.

The following NDBs were logged using the Perseus SDR along with my LF inverted L, resonated at 300kHz:

28 09:00 335 CC Concord, CA, USA
28 09:00 335 CVP Helena, MT, USA
28 08:00 335 YUT Repulse Bay, NU, CAN
28 06:00 335 YLD Chapleau, ON, CAN
28 09:00 336 LF La Salle, MB, CAN
28 13:00 337 FF Fergus Falls, MN, USA
28 09:00 337 7D Hudson Bay, SK, CAN
28 12:00 338 CMQ Campbell Lake, ALS
28 09:00 338 ZU Whitecourt, AB, CAN
28 12:00 338 RYN Tucson, AZ, USA
30 08:00 338 SHL Sheldon, IA, USA
28 07:00 338 TU Tulsa, OK, USA
28 12:00 338 YPX Puvirnituq, QC, CAN
28 12:00 338 K Port Angeles, WA, USA
28 10:00 339 6X York Landing, MB, CAN
28 10:00 339 MKR Glasgow, MT, USA
29 06:00 340 YY Mont Joli, QC, CAN
28 13:00 341 ELF Cold Bay, ALS
28 10:00 341 OIN Oberlin, KS, USA
29 06:00 341 YYU Kapuskasing, ON, CAN
28 09:00 341 DB Burwash, YT, CAN
28 09:00 342 PFT Pinecreek, MN, USA
28 09:00 343 YZH Slave Lake, AB, CAN
28 09:00 344 YOP Rainbow Lake, AB, CAN
28 09:00 344 XX Abbotsford, BC, CAN
28 09:00 344 FCH Fresno, CA, USA
28 09:00 344 BKU Baker, MT, USA
28 09:00 344 POY Powell, WY, USA
30 08:00 345 GF Grand Forks, ND, USA
30 08:00 346 OLT Soldotna, ALS
28 09:00 346 YXL Sioux Lookout, ON, CAN
28 15:00 347 TNC Tin City, ALS
28 13:30 347 DJN Delta Junction, ALS
28 06:00 347 LEN Leeny, ID, USA
28 15:00 347 SBX Shelby, MT, USA
30 08:00 347 YK Yankton, SD, USA
28 09:00 347 PA Prince Albert, SK, CAN
30 08:00 348 MC Mason City, IA, USA
28 07:00 348 MNC Shelton, WA, USA