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Another VE7 has been bitten by the 630m bug ... well, intrigued enough to start building a station. On the weekend VA7MM (Mark), in Port Coquitlam, asked if I could take a listen for his low power signal. I'll let Mark describe his setup:

"My transmitter is a HP8640B signal generator. It is stable and has 1 Hz
frequency readout with maximum RF output of 20dBm. CW keying was done by latching the antenna on and off of the HP8640B. The latching relay was driven by the send relay in an IC-746Pro running with full break-in CW
turned on. A 1N914 switching diode was installed across the relay coil as
the back EMF from the relay was measured using my oscilloscope to be a +50V spike. This effectively attenuates the voltage spike. A good safety
precaution before installation.

A second HF radio, an IC-7600, was on a separate wire antenna for receive
only and with Spectran running for signal analysis.

In the final setup three series coils totalling 330 uH and a series of
parallel variable capacitors adjusted to about 1000 pf were installed in a
series resonance circuit outdoors at the base of a sloping dipole with the
apex at about 40 m. The antenna outside shielded and center conductor were connected effectively making the antenna a vertical. There was no impedance matching. One ground radial about 300' long was laid out laying on the surface of the ground. The resonance circuit was tuned using a combination of a Blackberry Z10 smart phone real time video chat link of Spectran from the ham shack in combination with a portable VHF audio feed to both visually and audibly tune the resonance circuit for maximum output. I tried a parallel resonance circuit but it did not work.

The straight line distances between QTHs from Google are:

VA7MM to VE7SL: 60 km
VA7MM to VE7CNF: 10 km

Amazing that a piece of lab equipment can be enabled with a few hours of
tinkering to transmit a signal on the 630 m band a distance of 60 km.

Thanks for the first 630 m band contacts. It was fun. Now I'm going to start planning a permanent capability on 630 m."

Mark's setup reminds me of a Rube Goldberg machine but it all worked well enough for him to put out a solid 559 signal at 60km distance and provide his first official 630m contact.

As of today, the following VE7 stations have now made two-way contacts on the new band:

               VE7BDQ
               VE7CNF
               VE7SL
               VA7JX
               VA7MM

It would be great to see some activity from northern BC, VE6, VE5 and points further to the east. How about it fellas?

Courtesy: http://blogs.yahoo.co.jp/sapporo50w

Add Japan to the growing number of countries now allowing their radio amateurs access to the 630m band. A recent note from JA8JPO and others,  indicates that JA stations will have access to the band as of January 5th, 2015. Operation on their new band however, comes with a  few provisos.


Operations on 630m will be permitted at 1W EIRP, not as high as some jurisdictions, but adequate for plenty of exciting experimentation and for some DX opportunity. Additionally, there can be no operation if there is a house or an office within a 200m radius of the station, unless it is owned by the station operator. This restriction can be lifted if permission from the home or property owner is received. As well, the station will be subject to inspection by Telecom authorities before the licence is granted. No reason for these additional caveats have been offered as of yet but JA amateurs speculate that it may be for fear of disruption (by radiated harmonics) to broadcast-band reception or with possible interruptions to ADSL modems, still commonly used in rural Japan....time will tell.

In the meantime, it is reported, that hundreds of excited amateurs in Japan are now readying their stations for two-way 630m work, happy to have the band under any restrictions...if only the same level of excitement were seen among Canadian amateurs for their new band!

Probably the most-often discussed ham radio topic is that of 'antennas' and with LFers it is no different.

When it comes to antennas used for receiving,
you might be surprised to learn that even small, simple antennas, can be very effective on 630m. Small loops are easy to build and work well as they are often quieter than wire antennas and with preampflication, will usually yield a better signal-to-noise ratio.


The shielded Burhan's loop described here, is a good performer on 630m and below, while a tuned wire loop can be just as effective if resonated to 630m.

Easily built active antennas are also popular and once situated in a quiet spot in your backyard, can work extremely well, considering their size and simplicity. The PAØRDT active antenna is popular worldwide and offers good performance, if properly placed, as shown in this LF bandscan from Japan.


Several of the stations that I recently worked on crossband, from 630m to HF, were using their normal HF dipoles to listen on 630m. Often times a non-resonant antenna, such as an 80m dipole, can give reasonably quiet performance and is worth trying should you just want to listen. Others have used HF dipoles with the feedline shorted and fed as a top-loaded vertical (T), and resonated to 630m against a small radial ground. Try what you presently have and you may be surprised at what you can hear.

Transmitting antennas need not be large to enjoy 630m propagation. For most backyards, an inverted 'L' antenna would probably be the easiest to configure.

If you have a tower, the vertical portion of the 'L' could be hung from a support arm off of the tower, with the horizontal portion as long and as high as possible. If you have some trees to hang wires from, a center-fed 'T' antenna would also be effective.

Top-loaded 'T' Antennas. Courtesy: http://en.wikipedia.org/wiki/T-Antenna

In both of these examples, try and get as much 'vertical' as possible and then work on the top-hat portion. Top-hats with multiple wires will also increase antenna efficiency. An interesting paper by VK2DX, explains the process that he used to build and match a simple inverted 'L'.

Courtesy: VK2DX

As well, JUMA publishes an informative application note on building an 'L' for 630m.

If you don't have room for one of these types of antennas, effective results can also be had with short top-loaded radiators as used at many NDB installations. Try to go as high as you can and make the top-hat as large as possible.


Any of the transmitting antennas described above will require sufficient series inductance (base loading usually) to bring them to resonance as well as some form of variometer to fine-tune exactly. As well, they all require some form of ground system to radiate.

Since most backyards will never be large enough for an efficient ground system on 160m, let alone on 630m, just do the best that you can. You might be surprised at the results achieved with just a simple system of a few buried radials but the more you can lay down, the better. Radials can be effectively hidden beneath the grass with a few days of effort. Some have noted an increase in antenna current when ground rods were driven in at the far end of the radials.

Courtesy: http://www.auroralchorus.com/

This well-written series of articles describing simple antenna systems for the 1750m band is chalk-full of neat ideas and practical information...all applicable to the 630m band.


For an even more in-depth look at practical LF and MF antennas, the ON7YD site is hard to beat...again, all applicable to 630m.

Canada's new 630m band is a wonderful opportunity to build and experiment with all aspects of your station and it's crying out for activity!

It's still not too late to be the first station on 630m from most parts of Canada and the VE7's are waiting to work you!

Courtesy: http://americanradiohistory.com/

And...once again it's time for the monthly Co-ordinted Listening Event (CLE) for NDB hunters....the 188th event. These always interesting and popular affairs take place over three nights, with this one starting on Friday, November 21st at local noon and running until Monday, November 24th, local noon.








These listening events serve several purposes. They:

• determine, worldwide, which beacons are actually in service and on-the-air so the online database can be kept up-to-date

• determine, worldwide, which beacons are out-of-service or have gone silent since the last CLE covering this range

• will indicate the state of propagation conditions at the various participant locations

• will give you an indication of how well your LF/MF receiving system is working

• give participants a fun yet challenging activity to keep their listening skills honed

This time, it's a normal event, focusing on a small (~ 15kHz) section of the NDB band. Here are the details from event organizer, Brian Keyte (G3SIA):


Hi all,

The CLE Survey results are so interesting I almost forgot to send this!
Please join us in our 188th Co-ordinated Listening Event which starts
this Friday. All are very welcome - 'Regulars' and 'First-Timers' alike.
CLEs are not contests - if you enjoy taking part you are a winner!

Days: Friday 21st - Monday 24th November
Times: Start and end at midday, your LOCAL TIME
Range: 370 - 384.9 kHz

Just log all the NDBs that you can identify with their nominal (listed)
frequencies in the range (it includes 370 kHz, but not 385 kHz)
plus any UNIDs that you come across there.

Please send your CLE log to the List in a plain text email if possible
(not in an attachment) with CLE188 at the start of its title.
Show on each log line:

# The date (e.g. 2014-11-21, etc., or just 21) and UTC.
(the date changes at 00:00 UTC)
# kHz (the nominal published frequency, if known)
# The Call Ident.

Please show those main items FIRST - other optional details such as
Location and Distance go LATER in the same line.
If you send interim logs, please also send a 'Final' (complete) log.

As always, tell us your own location and brief details of the equipment
that you were using during the weekend.

I'll send the usual 'Any More Logs?' email at about 18:00 UTC on
Tuesday - you can check from it that your log has been found OK.All logs must arrive on the list by 09:00 UTC on Wednesday 26th
at the very latest.
I hope the combined results will be completed on that day.

To help your listening, seeklists are available via the CLE page
http://www.ndblist.info/cle.htm

Good listening - enjoy the CLE
Brian
----------------------------------------------------------
From: Brian Keyte G3SIA ndbcle'at'gmail.com
Location: Surrey, SE England (CLE co-ordinator)
----------------------------------------------------------

(If you wish you could use any one remote receiver for your loggings,
stating the location and owner - with their permission if required.
A remote listener may NOT also use another receiver, local or remote,
to make further loggings for the same CLE).

Final details can be found at the NDB List website, and worldwide results, for every participant, will be posted there a few days after the event.

The very active Yahoo ndblist Group is a great place to learn more about the 'Art of NDB DXing' or to meet other listeners in your region. There is a lot of good information available there and new members are always very welcome.

If you are contemplating getting started on 630m, listening for NDBs  is an excellent way to test out your receive capabilities as there are several NDBs located near this part of the spectrum.

You need not be an ndblist member to participate in the CLEs and all reports, no matter how small, are of much value to the organizers. 

Reports may be sent to the ndblist or e-mailed to either myself or CLE co- ordinator, Brian Keyte (G3SIA).

Please...don't be shy and do give the CLE a try....then let us know what NDB's can be heard from your location! Your report can then be added to the worldwide database.

A few days ago I received an email from Jack (VA7JX) letting me know that his "U3"project was now complete. You may recall Jack's helpful list of tips regarding the use of SMT components and correct soldering techniques in an earlier blog....well worth a read if you are contemplating a start in SMT construction.

The "U3" is the Ultimate3 QRSS/WSPR Transmitter Kit produced by Hans Summers (GØUPL) and is fast becoming a popular and inexpensive workhorse among WSPR fans. A short description from GØUPL's website indicates that the "U3" is:

"the third version in the "Ultimate" QRSS/WSPR kit trilogy. It can produce QRSS, Hell, WSPR, Opera and PI4 slow-signal modes anywhere from audio to 10m and above. Plug-in LPF filters are available for all 12 HF/MF/LF bands."

Jack has tailored his version for our new (to Canadian amateurs) 630m band but has also added a versatile MOSFET linear amplifier of his own design that runs on 12VDC. Using an inexpensive IRF540 switching FET, Jack can run up to 30W of output on 630m but normally runs at the 5-10W level on 475 kHz. Most of Jack's homebrew gear looks as if it just came off the Hewlett-Packard assembly line and his latest project is no exception.

All images courtesy of VA7JX

Using mainly the WSPR (Weak Signal Propagation Reporter) mode, Jack and many others, have found that 630m offers some amazing propagation, considering the low ERP levels imposed by the backyard-sized antenna efficiencies on this band. Using an inverted "L", resonated for 630m, his 5W signal has been spotted by the following stations in the past few days:

          WH2XCR (Hawaii) at 4258 km.
          WG2XJM, 3552 km, Shawnee, OK
          WH2XHY, 2822 km, Fitchborg Wi.
          WG2XXM, 2789 km, Wichita Kansas.
          N6KOG, 1390 km, Tracy Ca.
          KK6EEW, 1284 km, Healdsburg Ca.
          WE2XPQ, 1172 km, Alaska
          W7LW, 983 km, Kuna, ID
          W7MY, 605 km, Richland WA.
          WH2XGP, 504 km, Quincy, WA

VA7JX is one of the three west coast Canadian stations that have transmit-capability on 630m, the two others being myself and VE7BDQ (John). John can be found most nights on the 475kHz WSPR mode as well, running the legal limit of 5W EIRP into a small inverted "L" as well. John has also enjoyed good success on WSPR, having been spotted regularly on the east coast and more recently, in Hawaii. For exact frequencies of both stations, check the WSPRNet Activity page for the latest real-time information.

Although WSPR works well as a propagation indicator....and it seems that there is plenty of nice propagation on 630m....it does not allow two stations to actually QSO each other. Our new band really needs more Canadian stations to spark activity and get things rolling! Ideally, it would be nice to call CQ on the band, with a realistic hope of getting a reply.

With three VE7's now 'all-ears', nightly activity from VE6, VE5, VE4 and VE3 would be an exciting prospect and would really liven-up what seems to be a very prop-friendly part of the spectrum...who'd a thought it? It seems that amateurs are now re-discovering what the maritime operators have known for decades!

If any of us can help you with getting on-the-air, please do not hesitate to ask....and, if you are presently building or testing, you can look for your signal on the VA7JX 630m screen grabber....a real-time view of the band from VE7 land and available any time, by chance or by request, from VA7JX.

Friday evening's 630m crossband activity was 'interesting' in many respects. Propagation, which had been improving slowly, chose to follow Murphy's Law. The K-index, holding at a quiet '1', rose to level '3' by the time our event had concluded, as the geomagnetic activity ramped up. Additionally, lightning pocketed various areas of the continent, making listening noisy for many.

From here on Mayne Island (CN88iu), good two-way CW crossband contacts were made with the stations in the following order:

• N7IO (Seattle, Washington)
• VE7CA (North Vancouver, BC)
• KK7UV (Missoula, Montana)
• NW7E (Bend, Oregon)
• KU7Z (Ogden, Utah)
• VA5LF (Saskatoon, Sakatchewan)
• K7SF (Portland, Oregon)
• VE7BKX (North Vancouver, BC)
• K6TOP (Los Gatos, California)
• ABØCW (Westminster, Colorado)
• NO3M (Saegerton, Pennsylvania)
• KB5NJD (Duncanville, Texas)
• W7MTL (Independence, Oregon)

'Heard' reports were received from:

• KØSBV (Tucson, Arizona)
• WB6DCE (Seaside, California)
• KO6BB (Merced, California)
• K6CLS (Palo Alto, California)
• WY3B (Kaneohe, Hawaii)
• AA7U (La Grande, Oregon)

More than one of the DX contacts mentioned using just their HF dipole for listening to my signals on 630m and simply 'A-B' switching their transceiver's frequency while two of those sending 'heard' reports were using 100' longwires. Mike Tuggle (WY3B) in Hawaii was using his amazing 1-MOSFET regen and small inverted 'L' !

I was also more than excited to exchange signal reports with Pennsylvania and Texas. Considering conditions, this distance was far beyond my expectation but both of these stations have very efficient, dedicated 630m antenna systems.

John, VE7BDQ, worked the following stations on crossband:

• VE7CA (North Vancouver, BC)
• W7DRA (Seattle, Washington)
• N7IO (Seattle, Washington)
• NW7E (Bend, Oregon)
• KK7UV (Missoula, Montana)
• KU7Z (Ogden, Utah)
• VA7JWS (Delta, BC)
• VA5LF (Saskatoon, Sakatchewan)
• WB6W (Oysterville, Washington)

'Heard'  reports were received from:

• K5HK (Reno, Nevada)
• KØSBV (Tucson, Arizona)
• WY3B (Kaneohe, Hawaii)

It was gratifying to see all of these fellows making the effort to listen for our signals or to attempt the QSO.

This exercise taught me a few things about our new band.

• It is not necessary to have huge antennas and acreage to make this band work. Good solid contacts can be easily made with small backyard antenna systems.
• With good systems on both ends, transcontinental QSO's can be made.
• There really should be more interest by Canadian amateurs in their newest band as so much work has been put into securing this portion of the spectrum as a ham band. It was very disappointing not to work any stations in VE6, VE4 or VE3 land.
• There is already much interest in this band by U.S. amateurs, many of them anxiously awaiting the day that they can also call it a ham band.

I would like very much to continue this type of crossband activity to try and generate more interest in our new band. I'm presently considering a weekly, one-night crossband operation, similar to Friday's event, perhaps running for one hour per week. The main difficulty will be in getting the word out to those that might wish to participate.

The three VE stations active on 630m CW are looking forward to working you tomorrow (Halloween) evening via the crossband mode during the 630m Activity Night.







In the east, watch for VO1NA. On the west side, watch for VE7BDQ and VE7SL. Here are the transmitting frequencies, times and HF calling frequencies:

• VO1NA - Joe, in Torbay, Newfoundland. Joe will transmit on 477.7 kHz starting at 2130Z Oct 31 and will continue until 0130Z Nov 1. He will listen for callers on 3562 kHz and 7062 kHz.

•  VE7BDQ - John, in Delta, B.C. John will transmit on 474.0 kHz starting at 0100Z and will continue until 1000Z on Nov 1. He will listen for callers on 3536 kHz.

• VE7SL - Steve, on Mayne Island, B.C. I will transmit on 473.0 kHz starting at 0200Z and will continue until 0600Z on Nov 1. I will listen for callers on 3566 kHz and 7066 kHz.

630m propagation conditions have been very good this past week and barring any sudden auroral events, should continue. Unless you are within a few hundred miles of these stations, don't expect signals to be 'loud'. Even when running several hundred watts, antenna's that fit into backyards are not very efficient at radiating all of it! However, from what I have observed, propagation on 630m is very forgiving and has much in common with 160m. Distant signals can sometimes be surprisingly easy to copy when the sun is not up to its tricks!

I have no idea how many stations will be participating on HF but please do not give up should your first few calls not be answered. If conditions appear to be really good, operating hours will probably be extended. Unfortunately Saturday night will probably be out since it is the Sweepstakes CW weekend and will pretty much plug the HF bands, wiping out the calling frequencies.

Don't forget to watch for the Part 5 Experimental stations (WG2's and WD2's) who will be beaconing and working each other on 630m directly. I'm sure they would appreciate your 'heard' reports as well.

Good luck and see you tomorrow.