Wednesday 1 April 2020

Hamming It Up

Ham (amateur) radio that is. After working on HF frequencies for the past couple of years I decided to return to using the VHF amateur bands. Specifically 2m (144MHz). Last week I tried using digital modes on my white stick (vertical) aerial which was reasonable for contacting other stations in England but was useless for contacting any stations on the continent. On Monday I decided to rescue one of 2m yagi aerials from the garage, wound the mast over, changed the stub mast and wired the yagi beam in place.

It can be seen at the top of the mast. I left the 6m halo (square) aerial in place.
The white vertical aerial can be seen in the background at the bottom of the photograph.

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I also had to re-connect all the wiring for the rotator as the beam aerial needs to point in the direction I want to make contacts.

My simple set up

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The rotator controller on the left. Above the radio is a power meter so I can see how much RF power the transmitter is sending to the aerial.

When I am using digital modes of transmission I use an internet program to see which amateur radio stations are receiving my transmissions. The transmitter is connected to the laptop via a control box.

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Sunspot minimum is not the best of times for long distance contacts but I have made contacts in Germany, France, Holland, Belgium and the Isle of Mann.

5 comments:

  1. Very impressive. I used to detest SW at work. Halve the frequency at night or the other way round and if one station had daylight and the other not it was anyone's guess.

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    Replies
    1. PS. John you may know why DAB radio time is always a few minutes different to the computer and my radio clock. Not that I'm to half an hour these days let alone a couple of minutes.

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    2. Adrian: As the various radiation belts round the Earth move up and down whether in Sunlight or not it changes how far radio signals can be reflected from them.

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    3. Adrian: I think it's partly due to the few seconds of signal buffered in memory, partly due to time taken for the radio to decode it. When I have a couple of DAB radios on in different rooms they take different times to play the station. Some are more efficient than others.

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Thank you for visiting. Hope you enjoyed the pictures. Any comment, or correction to any information or identification I get wrong, is most welcome. John

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