Currently viewing the tag: "antennas"

 Yngvi, TF3Y piloted TF4X in the CQ WorldWide SSB Contest in the Single-Operator, Single-Band, High Power Category.

TFM 4398 DxO
TF3Y@TF4X

When the dust settled, the score was as follows:

3124 QSOs

93 Countries

25 CQ Zones

for a final score of 571,710 points.

Due to the recent sun spot minimum more or less since 2003,  there has been little activity on 10-Meters and almost no activity from my station.

Yngvi´s score was 5 times higher than last year´s top score in this category from Europe and his QSO total is similar to what Multi-Operator stations in the US  and top stations in the Caribbean accomplished this year.  

KC1XX had 3061 QSO’s, the K3LR super station had 3033 QSOs on 10 meters and W2GD made 3356 contacts on 10 meters from P40W in Aruba to give a few examples from the contest this past weekend.  TF4X´s 3124 QSOs compares very favorably considering the difference in propagation in the frigid north to what stations further south experience.

Most of the contest was recorded, both the audio and the 10 Meter Band spectrum using a Perseus SDR.

Here is a recording made on Sunday:

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Andrey, DL/KL1A sent me a link to a recording he made of TF4X in the Contest.

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Yngvi wrote in his Soap Box comments : 

“Had a great time. Ten showed a bit of life but still big room for
improvement, e.g. no JA’s. Being able to transmit to many Rhombics
while selecting others for reception is a big plus. The performance
of the station was excellent apart from a 40 min. electricity outage
due to a fault at the power company. Thor’s station keeps improving
year by year. Due to poor conditions in the past few years there has
not been much activity from the station on ten meters. We now have
proof that the Rhombics do a great job on that band as well. “

It’s not all work and no play, we also take time to enjoy good food and wine, it has become a tradition that my visitors contribute to the food over the weekend in exchange for the use of the station.

On Thursday I put a leg of Mountain Lamb into the oven to slow cook for 24 hours at 60°C – it turned out absolutely magnificent – I will be using this method often in the future.

Yngvi generously brought a very nice aged T-Bone steak 5cm thick which I prepared in my gourmet kitchen for Saturday’s evening meal.

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The raw T-Bone steak ready to cook
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Ready to eat!
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Perfect ! – details of cooking method provided on request. :-)

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The best T-Bone in the Arctic.

Sunday morning we had Spinach Shakshukah and in the evening slow cooked chicken…all dishes washed down with conservative amounts of fine wines.

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TF4M was honoured to have  Peter, VE3SUN and his wife Jane visit the station and tour the antenna farm during their short visit to Iceland.

Peter is the webmaster of the NCDXF International Beacon Project.

TF4M 10091
Peter, VE3SUN @ TF4M
TF4M 10092
XYL Jane and Peter, VE3SUN @ TF4M
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The Arctic Queen and the LDF7 cable salvaged from Reykjavik has arrived in her new home – rescued from a fate worse than death.

 TFM3006
 
 TFM3007
 
 TFM3008
500 metres of LDF7-50A Heliax
 
 TFM3010
  The Arctic Queen extends 8.5 metres from the back of the trailer.
 TFM3011
 
 TFM3013
  The roll contains 745 metres of control cable
 TFM3014

The length of the trailer is 12 metres, the Arctic Queen extends out of the trailer 1 meter in the front and 8.5 metres from the back.

I am grateful to the Icelandic Road Authority for granting a special permit for this road transport.

Unloading will begin immediately.

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 I am salvaging some LDF7-50 Heliax cable (1-5/8″) from the former transmitting site of TFA in the hills overlooking Reykjavik.  Development of the area came to a grinding halt due to the economic collapse of the country and therefore the cable was still intact in the ground.

A 600 meter long ditch was dug with a 18 tonne wheel based excavator and the cable has been taken out of the ground.

The trench will filled back in and the site of the digging will be returned to it´s original state.

It took 5 hours by a very experienced operator to dig the trench and I estimate it will take another 5 hours to fill it in again.

Due to the sheer weight of the cable, I had to cut it into pieces in order to be able to handle it by hand.    Yngvi, TF3Y passed by to check on my progress, the photos show only half the length of the ditch.

The photos are published with Yngvi´s permission – I processed them slightly to give them a HDR look.

2011 05 28 14 17 22 DxO
  TF4M  (photo by TF3Y)

The cable will be coiled up and shipped to my station by truck – 400km by road. 

This has been a lot of hard work and has been very costly, but that is the reality of digging for gold in the arctic.

The acquisition of this cable opens up the possibility of putting antennas on the peninsula called “Hyrndanes” on the other side of Otradalur river and on the other side of the road near the sea – a distance from the station of around 500 meters.

I am grateful for the cooperation I have received from the City Officials who are now in charge of this area formerly occupied by the transmitting site.

2011 05 28 14 17 43 DxO
  TF4M (photo by TF3Y)
2011 05 28 14 26 10 DxO
 TF4M (photo by TF3Y)
2011 05 28 14 26 37 DxO
 TF4M (photo by TF3Y)
2011 05 28 14 26 53 DxO
My helpers on the first day of rolling up the cables: Oddur, TF3OO and his sons. 
photo by TF3Y

I had the misfortune of twisting my back badly while pulling the cable out of the sand during the first day of digging –  relegating me to foreman duties.  

I hired a strong worker – Davíð –  to assist me and I was also joined by Villi – TF3DX,  Guðmundur – TF3SG and Benni – TF3CY who volunteered to assist me with the rolling up of the 500 metres of cable.  

I am extremely grateful for their assistance – without their help I could not have finished the job.

I had to divide the cable into 3 rolls, each around 200 metres long and weighing more than 250kg.  The rolls got larger and larger and heavier and heavier as we rolled up the cable, it turned out to be quite difficult to handle.

In addition to the cable, a 22 metre long pole weighing 2 tonnes was rescued from a fate worse than death (playground duties…) – it will now see glorious service again as an antenna support and has been named “Arctic Queen

Around 100 metres of tower sections were also put on the trailer before I ran out of room due to height restrictions. 

A special permit was obtained from the Road Authority to allow this long load to be taken by road to the West Fjords.  The Arctic Queen extended 8.5 metres from the rear of the trailer.

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Another new addition to my arsenal of test equipment is a brand new Riser Bond TDR purchased on eBay.   A small repair was required to get the instrument to work, but the price was right.

With this instrument I get a visual picture of my feedlines and coax cables.   I can use it to determine how well my Beverage antennas are working – a mismatch of the termination shows up very clearly and faults on my open wire feeders are easily located.

In addition, the instrument was very helpful when locating shorts on my 8 km long electric fence, showing me clearly which direction to walk in to locate any faults.

 TFM2982
 
 

Lee, K7TJR pointed out on the Topband reflector:

“The Tek 465 and many other scope models can be used as a TDR
without building any circuitry. One simply needs to take the A gate
signal out of the rear panel of the scope and connect it in parallel with
the transmission line or antenna under test at the vertical scope input.
The gate signal provides a fast rise pulse on the line under test at the
beginning of the trace. Of course the sweep must be free running.
Reflections are easily seen as a result. I have used this very
technique with both single and dual direction Beverage antennas.”

I tried this technique with my oscilloscope, switching between the GATE signal and the signal from the Riser Bond being displayed on the oscilloscope – although the technique certainly works to show any reflections, it was difficult to get any meaningful display compared to that from the Riser Bond instrument.

The VNA2180 software will be upgraded within the next few weeks with a TDR function.   That will be simply wonderful.

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A recent addition to my arsenal of test equipment is the ArraySolutions VNA2180.

With this instrument I am able to measure the isolation between antennas to determine safe working conditions of the station.

These measurements show that it is safe to have two stations working simultaneously on any band without the use of Band Pass Filters.

A TDR function will be available with the VNA2180 with the next software update.

DeltaMatrixSwitch isolation test
Delta Electronics Matrix Switch isolation test 1-180MHz
DeltaMatrixSwitch isolation test1 51MHz
Delta Electronics Matrix Switch isolation test 1 -51MHz
USArhombic to EU JA rhombics
Isolation between the USA Rhombic and EU JA Rhombics – separation of these antennas is around 700 metres.
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A TDR locates cable and connector faults in all types of coaxial and twisted pair cable.

The Pizzicato Pulse Generator is an elegant TDR (Time Domain Reflectometer) device. 

Although the Pizzicato is not calibrated, it is easy enough to determine distances to faults given the velocity factor of the cable being tested and relative to the total length of cable as shown on the oscilloscope display.  

KB6NU´s log mentions this as being available as a kit and eventually I purchased a kit from Bruce, KD8APB who still has kits available.

 
 TFM2823
Pizzicato
 TFM2796
My Dummy Load
 TFM2797
USA Rhombic – feedline 1300 meters long
 TFM2805
The Arctic King – feedline 700 meters long
 TFM2807
Eu Rhombic
 TFM2808
JA Rhombic
 TFM2809
SEA Rhombic
 TFM2810
AF Rhombic
 TFM2811
80m Delta Loop – feed line 200 meters long
 TFM2812
Remote Antenna Switch – no antenna selected
 TFM2813
EU Rhombic faster sweep time
 TFM2814
JA Rhombic faster sweep time
 TFM2815
SEA Rhombic faster sweep time
 TFM2816
AF Rhombic faster sweep time
 TFM2817
80m Delta Loop faster sweep time
 TFM2818
Remote Antenna Switch – faster sweep time
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After I worked VE2XAA/2 for my Zone #39 on 160 meters for the WAZ160 Award, I contacted Alex to get some background on his operation, and why Zone 2 , the Zone nearest to Zone 40 is so incredibly rare, so close and yet so far…
Our discussion is reproduced below.  (photos by VE2XAA/2)

hi Alex,I was telling a friend about the difficulty I had in getting a QSO from that area and that you were the only person going there once a year for two days.

No, Thor, I was not the only person who activated Zone 2 in the CQ WW Contests. As a matter of fact, my friend Yuri VE2IM (VE3DZ) goes there since 1999 and has already 90,000 QSO in his Zone 2 LOG. Another friend of mine, Victor VA2WDQ, operated as VE2EKA from Zone 2, and a group of Americans come to Zone 2 every year for the last 4-5 years to operate as VE2DXY, but only in SSB part of the CQ WW. The good news is that very active CW and DX operator Steve, VE2TKH moved recently to Sept-Iles, and is very active operating from VE2CSI club station. As for me, I try to go there every year, this time I was active only for 7 days – from November 23rd till November 29th, 2010.

Note : I missed VE2IM´s operation in September/October due to suffering near fatal post-operative complications. VA2WDQ was indeed QRV in December, but no mention was made of Zone 2 with his spots, so I am not convinced he operated from Zone 2.  Spots for VE2YDX on 160 meters were few and also fell in the period of my illness, they seemed to be mostly on phone as well.   VE2TKH does not seem to operate 160 meters either, so even all this activity does not mean that Zone 2 is available on 160 meters.

I listened for you the entire first night until around 10 in the morning when you closed down – all this time on 80m and great conditions into NA on Top Band the whole time!   The second night of the contest conditions got very poor, I worked you on some other bands, and finally around 0200 in the morning I gave up hope that you would ever go to 160. I turned off my amplifier and the radio and as I was going to bed, I decided to check for you one more time and there you were !   After about one hour of calling, I made the QSO with you, with NA and EU stations calling constantly on top of our QSO, I wasn´t  100% sure that you had logged me, so I tried to raise you again without success, I even found you on a new frequency after you moved….

Yes, Thor, I was very pleased that you called me on different bands – contacts with TF lands are also very rare for people around the World and in Quebec particularly. Our contact on 80 meters was in the first 10 minutes of the Contest and I was also happy to have such rare multiplier right st the start of the Contest.
When you called me later on 20 and then on 40 meters, I understood that you are making a serious effort in the Contest and I was kind of mentally prepared to listen for you on Topband. But when I finally heard you on 160, your signal exceeded my expectations! It was very strong, real S “9″ on the meter and there was absolutely no doubt about who was calling me. :-) The only problem was a huge QRM from the nearby station and relatively wide passband of my radio.

So it would be interesting to know, what your setup was, what kind of antenna you had on 160, how many QSOs you made on Top Band in the contest, what did the USA and EU wall sound like, how long did you stay on Top etc etc?

The set-up on 160 was not very good. Something you will see on the attached pictures. I used FT1000MP Mark V radio and a 400 watts amplifier. The antenna was a simple Alpha Delta dipole for 3 bands – 40, 80 and 160 m with apex at about 45 feet. I used same antenna on receive. The conditions on 80 were so good the first night, so I stayed there almost 9 hours from the start of the Contest and till I went to sleep for a couple of hours. After I woke up I decided to collect some mults on 160, Sometimes it took me a few minutes to complete a QSO and some of the stations did not hear me at all. 30 minutes later I left Topband and I only came back for 20 minutes to work some multipliers at around 23:10 UTC. About 2 and a half hours later I returned to 160 and stayed there for another 2.5 hours. When the rate dropped significantly I left Topband, so altogether in the Contest I spent not more than 3 and a half hours on 160 and my QSO total was 212, with 39 countries and 15 Zones. There was no surprise in such modest Topband score, because I almost never heard EU or other rare DX, and NA stations did not give me too many points.
However, what really surprised me – was the propagation on 160 after the Contest. 2 hours after the end of the Contest I felt like I could make few more contacts on Topband. I never heard something like that in my entire life! There were not too many stations on band probably because a lot of them were tired after the contest, but EU stations were very loud and I had a real pile-up even with my very modest set-up! I heard and worked many stations from UA1, UA3, UA4, UA6, UR, LZ, YU, SP, DL, I, F, G, EA – and a lot of them were S 9+20 dB! Some of them even had key clicks and sounded like local stations! At some point I was in doubt – maybe I was tired after the Contest and confused the band with 80 or 40? But no, it was indeed the 160 m band! Was it really a 599+ signal on my S-meter or was it just very low noise level at that time which made all the signals look powerful? Another surprise was realizing that not all EU stations heard me well – some of them continued to call me on top of my transmission and others did not come back to me when I replied to them… Same story with the stations from N.A. – I copied some of the U.S. station at about 559-579 level… I do not operate on 160 m very often, so this phenomena was quite new to me.

It must have been difficult on your end as well.

Yes, Thor, indeed – it was really difficult to copy a station coming at 539-559 level when a bunch of 599+ callers are on the frequency. So in case like this I was doing what other people usually do – when I finally could copy a DX station with relatively strong signal, I completed a QSO with it and asked N.A. to wait so I could call “DX only” for a few minutes. Usually I could make few other DX QSOs before I could return to the N.A. pile-up.

If I had not made that QSO with you, I would have had to wait another year for the next shot at Zone 2, perhaps in even worse conditions, or perhaps you would not go to 160 meters at all !  It could have taken years and years for me to work Zone 2. What is the reason Zone 2 is so rare?, with thousands of VE hams on the doorstep of Zone 2, why isn´t it activated more often?

It’s hard to understand for me as well. What can I say – probably there are not so many DX-men or Contest-men in Zone 2.  HAMs mostly active on VHF, over repeaters.  When someone visits Zone 2 for a Contest or DXpedition, it’s not easy to put up a good antenna for theTopband because of time limit and/or weather. Also, because it’s far North, the conditions there are not stable and sometimes restrict activity even more than lack of good set-up..

Considering the difficulty in working Zone 2, even though it is the closest Zone to mine and I had expected it to be a piece of cake, our QSO remains one of the greatest moments in my quest for WAZ160.

I am very glad to help you and others to work this rare Zone. It gives me a big pleasure to know that people can finally have this QSO in their LOGs. Actually, it was my goal – to give Zone 2 to as many people as possible, so my trips are not for nothing.

Happy New Year 2011, Thor! I wish you luck on the air!
73! Alexey
VE2XAA

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The designer of the Arctic King, Villi, TF3DX arrived to inspect and salute the King on Thursday along with his brother Gunnar.

In between measurements, we rummaged in my “junkbox” (several outbuildings) for High Voltage RF Capacitors and adjustable Inductors which will crown the King at a later date when 80m capability will be added.

Villi operated TF4X casually in the Oceania DX Contest – CW and in between consuming good food and wine, we also watched the stars and the Aurora and a historical First Ever QSO was made in this contest with KH6ZM in Hawaii on 160 meters.

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