AmateurRadio.com

CLE 237 will be held this coming weekend and will be somewhat different than normal.







'CLE's are 'Co-ordinated Listening Events, and NDB DXers around the world focus their listening time on one small slice of the NDB spectrum ... but this one is a little different.

This event has been organized around the Maidenhead Locator system and will challenge hunters to log beacons based upon the beacon's FIELD designation. Listeners should seek to log a maximum of five NDBs in each GRID FIELD.

The grid field is actually the first two letters of the grid locator, such as 'CN', 'FN', 'DM' etc., as seen in the map above. Each field itself is divided into 100 GRID SQUARES, but individual grid squares are not relevant for this CLE ... only the fields.

Most amateurs that operate on the VHF bands are very familiar with the 'grid square locator' system and many VHF operating awards and events are focused on working different grid squares. This may all be a new adventure for many non-VHF DXers but it does present a whole new way of keeping track of your catches.

I have always kept track of the grid square locator for all NDB signals that I hear and often find that a signal being heard from one particular square will lead to other beacons being heard (often new catches) from adjacent squares, while propagation is spotlighting that region ... it often pays to keep a grid square map handy while you search the band!

If you are not familiar with the grid square system, it's all pretty simple and this CLE only focuses on the largest part of the system, the FIELD. The first thing you should do is determine your own grid FIELD location, which, for North America, can be found very easily from the map above or anywhere in the world on K7FRY's locator map.

When tuning for NDBs, put your receiver in the CW mode and listen for the NDB's CW identifier, repeated every few seconds. Listen for U.S. NDB identifiers approximately 1 kHz higher or lower than the published transmitted frequency since these beacons are modulated with a 1020 Hz tone approximately.

For example, 'AA' near Fargo, ND, transmits on 365 kHz and its upper sideband CW identifier is tuned at 366.025 kHz while its lower sideband CW ident can be tuned at 363.946 kHz. Its USB tone is actually 1025 Hz while its LSB tone is 1054 Hz.

Often, one sideband will be much stronger than the other so if you don't hear the first one, try listening on the other sideband.

Canadian NDBs normally have an USB tone only, usually very close to 400 Hz. They also have a long dash (keydown) following the CW identifier.

All NDBs heard in North America will be listed in the RNA database (updated daily) while those heard in Europe may be found in the REU database. Beacons heard outside of these regions will be found in the RWW database.


From CLE organizer Brian Keyte:

===============================================
Here are the Final Details for this weekend's DX Listening Event.

We'll be listening for NDBs in as many Locator FIELDS as we can.

Fields are the first 2 letters of the 6 character locators ('Grid Square').

    Days:     Friday 26th October – Monday 29th October
    Times:    Midday on Friday to Midday on Monday, your LOCAL* time
            *(NB Many of us will be changing our house clocks this weekend.
               UTC time, shown in our logs, continues unaffected by that)
    QRG:      Normal LF/MF frequencies  190 - 1740 kHz
    Target:   UP TO 5 NORMAL NDBs IN EACH LOCATOR FIELD (see below)
                    (not DGPS, NAVTEX, Amateur or UNIDs)

Please also log YOUR NEAREST ACTIVE NDB - it will probably be one of
the five in your own Field.

A World map of all the locator Fields is attached.  You can see, for
example, that Field IO includes most of the British Isles.

(click map to expand)

Please post your CLE log to the List in a plain text email if possible,
with 'CLE237' at the start of its title and showing on each log line:

     The full Date ( e.g. 2018-10-26, etc., or just the day number 26 )
     UTC  (The day changes at 00:00 UTC).
     kHz - the NDB's nominal published frequency
     The Call Ident.

As always, put those FOUR MAIN ITEMS FIRST on each log line, with
any other optional details such as location and distance LATER in the
same line.

There is no need to show the locator Fields (the harvester program
will work out all of them and the nearest NDB you logged).

Your log will be easier to read if you leave a blank separator line
between the groups of up to 5 lines for each Field.

If you wish, you could add the 2-letter Field ident (NOTHING ELSE)
at the start of each separator line.

Any UNIDs that you come across will also be of interest - in a separate
part of your log please.

If you send interim logs, please make sure that you also send a 'FINAL'
log showing ALL your loggings for the CLE.

We will send the usual 'Any More Logs?' email to NDB List at about
18:00 UTC on Tuesday so you can check that your log has been found OK.
Do make sure that your Final log has arrived on the list by 09:00 UTC
on Wednesday 31st October at the very latest.
Joachim and I hope to complete the combined results within two days.


PLANNING YOUR LISTENING

It will really help you to plan your listening if you go to the excellent
Rxx Database  https://www.classaxe.com/dx/ndb/reu
(Replace the 'reu' by 'rna' if you are in North America, 'rww' elsewhere)

THE KEY PLACE to start entering details of what you want is
'Signal Locations - GSQs'.

Put a 2-letter FIELD id in that box to see all the NDBs in that Field that
have been logged from your part of the World (i.e. EU or NA or other).

You could alter the resulting list in lots of different ways:

Select 'Only active' (bottom right)
Enter your own Country or State in 'Heard Here'
Select a specific listener (yourself?) in 'Logged by' – BUT you might missa beacon that you haven’t   heard so far
Add extra locator Field(s) in the 'GSQs' box, separated by blanks
- In ANY of the above, you can select 'Map' instead of 'List' (top right)

Add your own full locator (6 characters) in the 'Distance - From GSQ' box to see the distances and bearings from your location.
In 'Sort By' (bottom line) select GSQ

Getting cleverer (!) you could use the wild card _ (an underscore) to see details of all Fields with the same column of Longitude or row of Latitude
e.g.  I_  selects all of locator column I (0  to 20 degrees west),  _O would give all of row O (50 to 60 degrees north).

Good Listening

73    Brian
---------------------------------------------------------------------
From: Brian Keyte G3SIA                ndbcle'at'gmail.com
Location: Surrey, SE England          (CLE coordinator)
---------------------------------------------------------------------

(As usual a handful of us may choose to listen via a remote receiver
with permission if required - its own location will be their temporary
home Field).
A remote listener may NOT also use another receiver, whether local
or remote, to obtain further loggings for the same CLE.

===================================================

My homebrew Ameco AC-1 clone

A weekly CW operating activity that seems to be growing in popularity is the Monday “NRN”.





The NRN get-togethers are an offshoot of the annual “NRR” or Novice Rig Roundup. Monday’s “Novice Rig Night” gradually grew from those that wanted to see the NRR fun continue, in one form or another, without waiting an entire year for the event to roll around again.

Operating times run from sunup on the east coast to midnight on the west coast ... but basically, people just get on the air whenever they can on Monday and call “CQ NRN”. I suspect that most of the activity takes place between late afternoon and bedtime, with 40m probably seeing the most action. As winter arrives, we may see more activity on 80m but these are only my personal observations from the west coast.

Most folks are using typical Novice-era transmitters and / or receivers, with the Drake 2NT, early Heathkits, Eicos, homebrews and Hammarlunds being popular. The previous Monday I was active with my homebrew Ameco AC-1 clone, a 6V6 crystal power oscillator, at about 6 watts out. Good contacts were had with several eastern stations. There are several AC-1s around and there has been at least one suggestion of an 'AC-1 Night' ... what fun that would be as well!

For last night’s NRN, I brought out my homebrew Paraset.


Once again, good contacts were had with the easterners on 40m: W9BRD in NJ, W3NP in WV,  KD2E in NJ and VE3LYX using his No.19 tank radio ... two WWII radios talking to each other in 2018, one real and one a reproduction!

VE3LYX's No.19 set operating position

The Paraset uses a two-tube regenerative receiver and, like the AC-1, a single 6V6 crystal controlled power oscillator. It's always difficult to judge propagation conditions when listening with a regen ... are conditions as bad as they seem or is it just my simple receiver making the band sound poorer than usual? Such was the case for me last night so next week I will spark-up the Paraset once again for another round of NRN fun. As promised on the NRR Facebook page (now at 1600+ members!), all Paraset contacts will be confirmed with my mid-30s styled QSL and these will be going out this week. 




Here is the formal announcement for the Monday events, with a few additional details. Hopefully you can join the fun (any rig is fair game!), next week.

courtesy:americanradiohistory

Over the past few months I’ve spent some time tuning around the international shortwave bands.


I vividly recall how jam-packed these bands were when I first discovered the magic of radio, back in the peak years of Solar Cycle 19. Much has changed in this part of the radio spectrum since then, but after having read so many dire comments describing the demise of international SW broadcasting, I was pleasantly surprised at what I discovered.



Although there are certainly not the large numbers of stations there once were, there is still a large amount of activity to be found throughout the various bands allocated to international SW broadcasting.

courtesy: https://communicationwhiz.com/short-wave-radios-guide/

Trying to keep track of station schedules and frequencies is a hobby unto itself but now made easier with the availability of so many online information sources. As when younger, I found the best way to stay organized was to keep a SW logbook, eventually settling on a simple ‘diary’ format which is still evolving.



Its next refinement will be an additional notebook having separate pages devoted to each individual frequency within a given SW band. This will allow for updating frequency information from various postings of the daily online ‘heard’ reports.

I’ve always had a great interest in QSLs and collecting cards was one of the things that initially attracted me to SW radio back as a pre-teenaged DXer. For me, not much has changed in the last several decades and I still enjoy QSLs ... the real, traditional cards, as opposed to the now popular e-card. For me, an e-card just doesn’t have much appeal for some reason but for many others, they work just fine.

As I slowly re-learn much of what I had forgotten about SWL’ing, I discovered that there are still many SW broadcasters that will acknowledge a reception report with a real paper card ... just like the good old days!

If you are keen on doing some serious listening, I cannot recommend the WRTH highly enough.





Studying the latest WRTH revealed the QSL policies of most international as well as domestic SW broadcasters as well as contact information. It is a superb annual reference and well worth the investment! With this information in hand, my listening has become more focused on recording and submitting reception reports to those stations still practicing the courtesy of acknowledging reports with a traditional QSL. Many stations also issue an e-card, but these are of little interest to me at present.




With a small amount of spring-summer time devoted to SW listening, I generated and submitted a few reception reports along with linked audio files on my website ... so far, the following QSLs have arrived:

Radio Exterior de Espana

15520 kHz - Noblejas, Spain

Radio Free Asia

9950 kHz - via IBB on Tinian Island, S. Pacific

All India Radio (AIR)

9865 kHz - Bengaluru, India

DX Clube Sem Fronteiras Broadcast via WRMI 7730 kHz, Miami

T8WH - 9965 kHz Palau, South Pacific

HSK9 - 5875 kHz Udon Thani, Thailand

Radio Liangyou - Hong Kong

9275 kHz via Bocaue, Philippines site

Radio Romania - 9730 kHz - Bucharest, Romania

Radio Nikkei 2

3935 kHz - Chiba, Japan

I’ll do an upcoming blog on some of the great information and online sites to support international SW listening activities.

courtesy: https://sdo.gsfc.nasa.gov/

It seems that for the CLE236 listeners in western North America, my worst fears came true. The week preceding last weekend's listening event had seen great MF propagation and quiet geomagnetic conditions.




On Friday evening, shortly after the start, a geomagnetic storm commenced, with K-levels reaching 5-7 at various stations ... pretty much sounding the death knell once again. It seems more than coincidental that almost every CLE in the past few years has seen horrific geomagnetic conditions in lock-step with our scheduled monthly events!

Since there were no active regions on the Sun at the time, I suspect, as mentioned in my last blog, that we were victimized by a sudden spurt from the same coronal hole that whacked us last month, as it lined-up once again on its monthly reappearance. Arriving on Friday evening as sunset approached, the effects seemed to spare the rest of North America (and Europe), as western listeners were the only ones reporting poor propagation. As well, lightning noise, often abating by this time of the year, created havoc for many listeners ... even those with good propagation.

I can only hope that next month's event will see a major improvement in noise levels as well as in propagation quality. Hopefully, that pesky coronal hole will have closed itself by then!

On top of the above mentioned challenges, CLE236's frequency range was smack on top of my local pest, AP-378, whose antenna is less than one mile from my own antennas. Having an S9 +60db signal in the middle of the narrow CLE range does make for challenging listening. My 10' x 20' loop knocked AP's signal down about 25db, allowing me to hear the following signals, some only barely.


 
See you in CLE237.

AP-378 Mayne Island, BC

How time flies. Once again it's a CLE weekend. It seems like the last one was just a week ago!




 'CLE's are 'Co-ordinated Listening Events, and NDB DXers around the world focus their listening time on one small slice of the NDB spectrum.

This time the hunting ground is the 15 kHz slice from 370.0 - 384.9 kHz.

This is a somewhat dreaded range for me since my local blowtorch NDB, 'AP' (378 kHz), sits right in the middle of the range. 'AP' is located at the entrance to Active Pass, the main ferry route to Vancouver Island, and the antenna is about 3/4 of a mile down the beach from me. Needless to say, the beacon is about 40db over S9! With careful loop nulling, I can reduce this by about 25db but it's still an enormous signal to deal with.

Hopefully you can put 'AP' in your own log this weekend but its 25-watt signal will be much weaker for you. It's been logged as far east as Illinois and with your receiver in the CW mode, can be found on 378.399 kHz.

All too often our CLE weekends get hammered by geomagnetic disturbances, possibly because our monthly schedule syncs up nicely with the Sun's rotation and the disturbance from the previous month once again rotates into position. Conditions this time surely can't be much worse than for our previous event and today's mid-week check looks promising.

courtesy: NOAA

courtesy: NOAA

Things seem geomagnetically quiet at the moment so lets hope they stay that way. LF and MF propagation can often be amazing in the fall and as summer storms start to dissipate, the band can become much less noisy.

From CLE coordinator Brian Keyte (G3SIA), comes the following CLE info:


Hi all,

Please join us in our 236th coordinated Listening Event which starts
this Friday and celebrates the arrival of the Equinox this weekend.
CLEs are not contests - if you enjoy taking part you will be a winner!

    Days:    Friday 21 September - Monday 24 September
    Times:   Start and end at midday, LOCAL TIME at the receiver
    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 CLE236 and FINAL at the start of its title.
Show on each log line:
    # The date (e.g. 2018-09-21, etc., or just 21) and UTC
          (the date changes at 00:00 UTC)
    # kHz  (the nominal published frequency, if known)
    # The Call Ident.

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.

Joachim or I will send the usual 'Any More Logs?' email at about 17:00
UTC on Tuesday - you can then check that your log has been found OK.
All logs must arrive on the list at the very latest by 08:00 UTC on
Wednesday 26th September.  We hope to complete making the combined
results within a day or two.

To help you to plan your listening, seeklists and maps for your part of the
World 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 coordinator)
------------------------------------------------------------------

If you are interested in some remote listening - maybe due to local difficulties - you could use any one remote receiver for your loggings, stating its location and with the owner’s permission if required. A remote listener may NOT also use another receiver, local or remote, to make further loggings for the same CLE.
 -------------------------------------------------------------------

W7OS - Radio Club of Tacoma working the CX

This fall's running of the CW "Classic Exchange" will take place on Sunday, September 23 and on Tuesday, September 25. The following week will see the Phone "Classic Exchange", on Sunday, September 30 and on Tuesday, October 2.


The "CX" encourages participants to use older vintage gear including any homebrew equipment, both receivers and transmitters. A unique scoring system provides bonus points for various equipment and combinations as well as encouraging 'repeat contacts' when you switch to different equipment.

W8KM and his wonderful vintage station

No vintage gear? ... no problem! All amateurs are invited to participate and get in on the fun no matter what they are using and submit their scores.

K3MD's Heathkit AT-1 and Hallicrafters HT-37 ready for the CX

The CX is a low-key relaxing affair and the 'extra' Tuesday operating period should encourage a lot of midweek activity from the vast numbers of retired operators who cherish and run older gear.

Lots of combos ready at W4BOH's CX setup

K6ZI, Las Vegas - WWII ARC-5s ready to go

For complete details, see the web site announcement here.

If you've never entered the Classic Exchange, why not give it a try this year as it truly is a case of 'the more the merrier' ... and eastern operators, make sure to keep the porch light on for us out west!

In the years before amateurs in the UK had access to the 630m band as we know it today (472-479kHz), hams there could apply for a 'special research permit' allowing them to operate between 501 and 504kHz.


One of the first and most active stations was operated by Finbar O'Connor, EIØCF, located in the most northern part of Ireland, near Malin Head. In the early days, Finbar might as well have been AC4YN in Lhasa, Tibet, as a 630m or a 2200m QSO with EIØCF was a much prized DX trophy and a genuine 'right of passage' for many little backyard LF and MF stations throughout Europe.

Nowadays, 630m activity in Europe is not as robust as it once was but Finbar is still active on MF from his modest station. He reports being copied in North America on several occasions. Although mainly active in the WSPR mode, Finbar is now considering the two-way JT9 weak signal QSO mode and may hopefully once again, tease east coast North American MF operators with a new rare entity from his seaside location.

Finbar's WSPRlite setup for 630m

Over the years, EIØCF has gone portable as well as marine mobile to demonstrate the viability of this part of the spectrum for very reliable groundwave comms using equipment that is both simple and quick to deploy. Although he used a CW-based system, his conclusions could just as easily apply to SSB or digital modes.

EI0CF/marine on 630m!

What follows is a delightful adventure, in Finbar's own words, describing some of his field trips back in the 500kHz experimental days ... perhaps it will inspire some North American portable work or provide ideas for an emergency prep 630m grab-and-go kit, or just get you excited about our newest amateur allocation.


                                    ******************
              Operating Portable on 501 - 504 khz Medium Wave



Operations on the north flank of Slieve Snacht Inishowen Peninsula.

In June 2009 Ireland joined a growing number of countries permitted to operate on a small portion of the medium wave band, just below the commercial broadcast segment, in the range 501 - 504 khz. Several stations were granted permission and operations commenced. As has been documented elsewhere many stations have been worked, both in band and cross band, at home and abroad, ranging from Continental Europe, across the Atlantic to the USA and Canada, down to the southern end of Ukraine and finally up to Iceland, Norway, Sweden, Finland and also being heard in Moscow.

A notable feature of this band is the steady reliable nature of groundwave coverage and with this in mind I recently availed of the facility whereby portable operations can take place. Comreg, together with the IRTS and the individual involved, require that each event is applied for, giving relevant dates, location, contact details, hours of operation and the power of the transmitter being used.

In the period leading up to all this it was necessary to build and test a viable portable station based on the use of my Berlingo van. A 30' part of a 40' Spiderbeam fibreglass  pole was used with a simple round wooden peg to secure the 'Tee' wire antenna, which was fabricated from twin twisted multistrand speaker wire. The vertical used both, while the rest was pulled apart to form the two horizontal legs.

A 100 metre roll of 1.5 mm insulated earthing wire was cut into 16 lengths to provide radial wires, with lugs soldered to one end and a bonding bolt used to secure a single point for the radial kit. The far ends formed a small loop which was sealed and secured with insulating tape. The loop provided an eye for a small L shaped stiff wire, fashioned from discarded coat hangers, an ideal and cheap way to hold the ends of the radial wires in place in the ground.

To secure the antenna support to the van, I refer you to the excellent idea described by John EI7BA, on his web page, for a ball hitch connection:

http://www.qsl.net/ei7ba/a_ball_hitch_mobile_mount.htm

Using this superb idea, I got the welder out and made one for myself. It worked perfectly.

I now had the support and wire antenna, with a ballpark figure for what might resonate, along with the radial kit. I next needed a dedicated antenna tuning unit. An old variometer and two extra fixed multitap coils were selected. A home made 1 amp ammeter and SWR twin meter unit completed the fit-out. These were all assembled on a base with a handle on the top, making it easy to move around whilst out and about.

The main antenna for 500kHz was disconnected and left floating and the van set up with all this gear, but no transmitter. Instead, my little antenna bridge running off a 9-volt battery provided the necessary signal to start testing for basic resonance.

Whether from sheer good luck or some sub-conscious input, resonance fell within the range of the variometer with only one of the two extra coils in circuit. The relative height and length also play a part in the range of resonance secured. Matching to 50 ohms was then optimized by selecting 4700 pf Mica capacitors using Croc Clip links. The available value ranged from 1 nF to 14 nF.

I have a selection of 500khz transmitters, two of which are to the design of Roger, GW3UEP, who lives 10 miles inland from the coast, in south Wales. His 500khz web site is well worth checking out, containing plans for versions of his 500khz transmitters, test equipment pictures and recordings of 500khz activities.

http://www.gw3uep.ukfsn.org/

One of these was used to put some RF into this first portable style installation, and by arrangement, Roger listened and heard my signal. We delightedly completed a short contact, with my transmitter running just 10 watts.Things were looking good.

One of the very valuable things about portable operations stems from the need to bring together several elements to secure a working radio station, without the usual backup we enjoy from home. Planning is essential. Doing a dry run, i.e. actually physically building the intended station then notating all the gear required and making a list as well as providing backup items, particularly those that which if broken or lost, would render the whole radio station non-viable. This also extends to the operator of the equipment. Will they be warm or cool enough, have shade, food, water and enough needed rest? Always be prepared to abandon the project if safety is compromised, for whatever reason.



Now that I had a viable portable station for 500kHz working, it was time to head off and test both the equipment and myself in the real world, but without any live transmissions taking place.

Several sites were chosen and tested, with particular emphasis placed on remoteness, i.e. high up on mountains or near the sea. All sites worked very well, but those by the sea proved really excellent. Reception of NDB’s (Non Directional Beacons) provided a ready supply of medium to low frequency signals for range testing. I was now itching to “ have a go “ out in the wilds, on 500kHz! Using the method required by Comreg, an application was made for several sites, on specific days.




In early June I loaded up the van with all the gear and headed off for the mountain above Redcastle, County Donegal. Using a narrow track and climbing higher, to about 270 meters, a place was found leading to an old quarry. Typically, it had started to rain. By the time I had erected the support pole, pulled out and secured the top hat wires using light nylon line and deployed the radial wires around and below the vertical drop wire, my trouser ends were very wet!

Plugging in the 12-volt supply, the receiver was very quickly perked up, using the variometer. The Morse key connected to the QTX transmitter and the transmit / receiver switch flicked over. Time to get some RF flowing in the antenna. Sure enough, on key down, the antenna current meter shot right up to 400 mA, but the SWR match was not exactly perfect. Time to work those Croc Clips and start selecting shunt capacitors to find the perfect match. Soon I had that sorted to my satisfaction, with antenna current now up to 550 mA. A quick return to receive showed that Roger, GW3UEP was already tuned up on frequency.




"..... GW3UEP DE EIØCF/P HW K"

He came back straight away! Oh joy, we were on the air on 500, in a remote mountain area, the top of my antenna almost tipping the clouds as they swept past. I was open to the elements, standing at the back door of the van with the tips of my fingers reaching for the knob of my very favourite old Amplidan morse key, snug beside the other bits and pieces of equipment on the van floor!

My logbook, with its pages flapping back and forward in the wind, soon had the first 500kHz portable contact documented. A full hour later, solid steady signals continued at a distance of 250 miles. Proving just how good groundwave signals can be, I terminated communications from the remote portable location, happy with the results. Within 12 minutes I had dismantled the station and was on my way to Moville, along with a strong cup of coffee at the café on the town's main street.

Several other portable operations have since taken place. A number have also occurred at my home location. We live right beside the sea; high tides lap up on to the salt marsh, which is part of the property.




Driving a single earth rod into the sea shore to a depth of 1 metre, with no radials and just a single wire between the rod and the ATU earth, the 1 amp RF meter had its meter needle slamming against the end stop. Lots of antenna current for 15 watts transmitter output power. Those same 15 watts only providing, at best, 550 mA, whilst up on the mountain sites.

Finally, it was thought productive to try a kite-supported antenna from the seashore portable set up. Winds on the day selected seemed strong enough to enable my Delta shape kite to head aloft with a flying line and antenna wire attached. The Berlingo van was driven down on shore, everything connected and tuned up. All was well, or was it?

The receiver now seemed quite dead with no band noise and no antenna current on transmit. Looking skywards I could see nothing. My eye followed the antenna wire heading for deeper water. Then I saw it. The kite had plunged into the sea! The following 30 minutes entailed untangling loads of seaweed with the line wrapped around rocks, barnacles and everything imaginable. What a mess! I almost gave up, but knew that Roger would be coming up on frequency, on sked, in about 15 minutes.

Eventually I managed to get the kite skywards again but by now the wind was acting more unpredictably. I established contact with Roger and he immediately gave me an S 7 report for my 15 watts. This equated to the report I would get from my main station antenna running 100 watts. My single ground rod and 150 feet of wire were doing the business.

We carried on our contact, but what remained became a battle of wits, with a kite constantly diving down and soaring up again. Several times the antenna wire was in part lying on the sea shore and antenna current way down to 200 mA or lower. My left hand was on the variometer tuning knob, tweaking the setting as best as possible, while pulling in the slack to keep the antenna wire off the ground. Feeding the wire out again to a misbehaving kite, I kept keying away with my right hand, keeping Roger updated so he could understand why my signal was changing both in pitch (sudden antenna mis-match conditions) and signal strength.

Luckily he was also making a recording, which proved later to be a fascinating record of a difficult portable antenna and station operation. It’s remarkable how tolerant, despite the wildly changing antenna conditions, the system actually was in practice. Communications were maintained despite all these negative factors and severely decreased radiated power at times.


Several other tests were conducted within these experiments which would have been almost impossible to conduct without the challenges thrown up by my portable operations. To my mind the 501 – 504khz band exhibits a distinct advantage for enhanced groundwave coverage over that available to higher frequencies.

Relatively simple equipment deployed in remote locations, with or without the availability of the power grid, would provide a solid backbone link or network in times of emergency. Transmitter power output was kept deliberately low to ensure that a higher ERP would not mask any possible weakness in the system. I am happy to conclude that Medium Frequency CW proved it’s worth once again.

Already I have further plans to test smaller, more compact portable antenna and earthing systems in more remote locations.

Finbar O’Connor EIØCF Malin, County Donegal.