Currently viewing the category: "Amateur Radio"

 A massive Aurora graced the southern sky last night, October 24. around 2300 UTC.

I used a variation of Tony´s Magic Cloth technique on some of the photos. 

I took a bunch of photos.   They may be viewed in this album:

aurora24oct2011

172 Photos

Below are the photos I selected for further processing by DxO Optics Pro.

Click on the photos to view larger size.

 
TFM 4184 DxO
 
TFM 4192 DxO
 
TFM 4219 DxO
 
TFM 4225 DxO
 
TFM 4240 DxO
 
TFM 4242 DxO
 
TFM 4244 DxO
 
TFM 4245 DxO
 
TFM 4248 DxO
 
TFM 4272 DxO
 
TFM 4276 DxO
 
TFM 4278 DxO
 
TFM 4292 DxO
 
TFM 4311 DxO
 
TFM 4312 DxO
 
TFM 4322 DxO
 
TFM 4327 DxO
 
TFM 4329 DxO
 
TFM 4163 DxO
 
Start Slide Show with PicLens Lite PicLens

 Siggi, TF3CW visited my station during a working trip and made a few contacts on 160 Meters with the Arctic King using my call sign.  - (20. October 1850z – 1925z)

TFM 4147 DxO
TF3CW operating TF4M with the Arctic King
Start Slide Show with PicLens Lite PicLens

Back at my station after a brief absence due to illness, I find the 10 Meter band wide open.   What surprises me is that 160 Meters is wide open for DX at the same time.

It has been common knowledge that with an increase in sun spots, the higher frequencies would improve and the lower frequency bands would be unusable.

This belief probably stems from the herd mentality, where most people move up in frequency as the conditions improve and simply neglect the lower frequencies.

The fact that I am enjoying good propagation on both high and low bands bodes well for the future, since I have not the slightest interest in the higher bands.

I heard VK3PA with good signals, but since we had already worked each other I did not call him.

The first QSO with JA was with JA7NI who was the first ever JA a station to have a QSO with TF on Top Band and around noon today I heard an extremely weak signal calling CQ.  - This signal was not audible on my Beverage antennas, but I was able to read him by listening directly with the Arctic King.

It is absolutely mindboggling to be able to work such weak signals – in broad daylight as well, for this to be possible both locations must have excellent receive capability.

T32C was worked on 160 meters at 1141Z – almost high noon at my location!

There is no doubt in my mind that this is the First Ever QSO between Kiribati and Iceland on Top Band.

 
T32C QSO 160 1141z oct2011
160M QSO Confirmed !

I did not record the QSO, but I heard them the following day (Oct. 21 at 1140z) with similar signal levels.   This recording is made directly from my transmit antenna the Arctic King since they were inaudible on my  Beverage antennas.

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

T32C QSO 160 1141z oct2011
T32C QSO 160 1141z oct2011

The display of Day and Night is taken from VE3NEA´s program – DX Atlas

Villi, TF3DX/M worked them on all bands, 160 – 10 by using his experience and technical abilities to the fullest.  

On 160 Meters, the signals from his mobile antenna fed by 100W ( 2.5% of that power is radiated ) may be around 25-30dB lower than that of the Arctic King.

The Arctic King does not have a Salt Water path in this direction as a mountain is in the way and affects this direction. 

TF3DX/M  worked them on 160 Meters by parking his car practically in the water in a location which gave him a Salt Water path to T32C and y using Gray – Line propagation enhancement to his advantage.   Congratulations !

Start Slide Show with PicLens Lite PicLens

The Array Solutions QSK-Master has now been installed with the Harris RF-110A amplifier and it works beautifully.

The RF-110A had slow T/R switching making it almost unusable for my purposes.   

With the QSK-Master, the T/R switching is  better than anything I have ever experienced before and with the small modification I performed to control the bias directly from the unit ( a 10V control voltage at 4 mA is switched to control the bias of both driver tubes and output tubes ), the amplifier is now biased to cutoff when it is not keyed.  

This ensures much less heat and less waste of power.

The amplifier is even cut off between CW characters in QSK operation.

TFM 3928 DxO
TFM 3928 DxO
 
 
Start Slide Show with PicLens Lite PicLens

 A German group is on a DXpedition to Ascencion Island and I worked them on 40 Meters CW.

I need ZD8 on a couple of bands so will keep looking for them.

Here is what their signals sounded like.

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

 Southern Sudan is being activated as a new entity with the call sign ST0R.

Pile ups have been fierce but I was able to work them on 30 Meters.

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

And on 40 Meters SSB:

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

The pile ups have been very chaotic and unruly, it seems that constant calling is in vogue and in addition extremely bad behavior  may be observed on the transmit frequency of the DXpedition making copy extremely difficult.   On top of all this jammers are out in force as well, creating a most shameful spectacle.

EI2KC writes about the ST0R pile ups in his post.

I agree with Andrey, RW3AH in his post, that this is probably the result of dropping the morse code requirement in Amateur Radio licensing.  

We now have many former CB freebanders within our ranks who bring their criminal mindset to our hobby now that the only requirement for an Amateur Radio licence is enough money to buy a radio.

 To the ST0R team: Thank you for going there and making the effort and thanks for all the excitement!

I found ST0R on 20 Meter CW in a free for all huge pile up this morning.  It took only a couple of calls to get into the log and since it took a few tries to correct my call,  I was greeted by name by the operator (RA9USU) 

ST0R on 20M CW: 

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

The recording runs for a minute after the QSO to give an idea of the massive pile up.

Here is a video from RW3AH of the ST0R 20m pile up:

Wednesday July 27.:  This morning they were quite light on 17 Meters, but I decided to try anyway.  When I heard the operator say UP8 I immediately gave my call a few times on that frequency which resulted in the valuable contact.   

ST0R on 17M CW:

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

I spent a long time calling ST0R on 80 Meters when they first came on, but without a dedicated 80 Meter antenna I am simply not making it through the EU wall.

Later I was ready when they started operation on 40 Meters CW and snagged them within a minute of calling.  The operator started listening low in the band moving slightly up with each QSO – such predictable operating makes it relatively easy to work the DXpedition – good work. (RA9USU).

ST0R on 40M CW

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

This is what the pile up looked like on the display of my SDR receiver.  (click on image to see it full size)

ST0R 40mCW
 

Thursday, July 28:

Things seem to be calming down a bit.  After monitoring 17 Meters SSB for most of the day, their signals improved a bit and it only took a couple of calls to make the log. 

ST0R on 17 Meters SSB:

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

TF4M QSO ST0R
 

They have now been QRV on 80 Meters for a couple of nights.  I have called them endlessly without luck since I do not have a dedicated antenna for 80 Meters (under construction – will hopefully be ready this winter) and have been using my USA Rhombic which has a poor radiation pattern at such a low frequency although it accepts the power readily.

I heard TF3SG work them – congratulations Guðmundur! – and it took me an hour more to finally work them.

ST0R 80M CW:

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

ST0R 20M SSB:

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.

Now I am waiting for them to show up on Top Band and if I can contact them there I will be well pleased.

Start Slide Show with PicLens Lite PicLens

The new Harris RF-110A Radio Frequency Amplifier has been installed and tested. 

The amplifier has 2 x 4CX1500B tubes in parallel in the output stage (3000W plate dissipation) biased for Class AB1 operation and runs an easy 1 kW output in any mode (key down forever…) on all bands.

It takes 100 W from the exciter through a 30dB attenuator which provides 100mW to a pair of 8122 tubes running in Class A (capable of around 1kW by themselves) which amplify the 100mW signal to 10W to drive the PA tubes.

The amplifier is cooled with a very noisy 4″ muffin fan rotating at 11,000 RPM – a real screamer –  necessitating installation in the adjacent soundproofed equipment room.

The T/R switching is rather slow and clunky by today´s standards – on the order of 200mS until full output is reached due to timing constants in the bias circuit which prevents hot switching of the relays, but by increasing PTT to generated RF delays in the equipment everything functions reasonably smoothly.

An ArraySolutions QSK Master unit is on order to use with the amplifier – once this unit is installed there will be no moving parts inside the amplifier.

The RF-110A generates 3.5kW of heat for 1kW of RF output – this makes it necessary to improve ventilation of the equipment room.  It consumes 1kW in Standby mode.

I would appreciate comments on the quality of my signals as I test the unit.

From top to bottom:   Harris AM-7224 1kW amplifer, Harris RF-110A 1kW amplifier

Harris AM-7224 1kW amplifer and two power supplies for the AM-7224 amplifiers.

TFM 3588
 

In addition the station has a Harris AM-7223 500W amplifer, an Emtron DX-2SP and an Emtron DX-3 amplifier.

Start Slide Show with PicLens Lite PicLens

 During my recent travel to Sussex, England, I was served with a heavenly fried egg for breakfast.

My wife and I stayed at Millers Bed & Breakfast in the beautiful historic town of Lewes.

I can recommend Millers without hesitation – we had a wonderful stay.

On the last morning of our stay I was allowed to observe how the lady cooked her eggs and the photo shows my first attempt with the method.

TF4M 10388 DxO
The Perfect Egg!

The egg alone was worth the trip to England.

TF4M 10397
Alexey, VE2XAA with two perfect eggs!
Start Slide Show with PicLens Lite PicLens
Performance Optimization WordPress Plugins by W3 EDGE