8 Oct 2020

2m activity contest - nearly forgot!

On Tuesday evening the RSGB held its 2m activity contest. This runs for 2.5 hours from 1900z. At 2100z I checked my mail and saw I had a contest alert. I had totally forgotten! 

Luckily  I was able to go on for the last 28 minutes working the stations shown on the map with 10W and the big-wheel omni antenna.

7 Oct 2020

Covid-19 vaccines - NOT amateur radio

There is a worldwide race on to find vaccines that overcome Covid-19. In most countries of the world this disease is causing widespread issues and an effective and safe vaccine is urgently needed.  Most expect a vaccine to be widely available my mid 2021. It is possible there may be limited vaccine availability late this year. 

See https://www.bbc.co.uk/news/health-51665497

USA presidents - NOT amateur radio

Although I have no intention of getting involved with the USA presidential election in a few weeks time, I feel obliged to point out a couple of things. In the last few years I have spoken with many people about US politics. The following observations have been made:

  • How come the best you can find is old men to lead you? Trump is 74 and Biden 77 I believe. Is there no-one younger who can do the job?
  • Everyone, and I mean everyone, I have spoken with thinks Trump is thick and cannot understand how he was chosen as the US president. In the rest of the world he is the butt of many jokes.

Ducks - NOT amateur radio

When we walked past yesterday there were 4 ducks sleeping on this footbridge. One flew away and I only managed a photo of the 3 that remained.

2m FT8 (2.5W to the big-wheel omni antenna)

Since 0825z I have been on 2m FT8. Nothing yet spotted on RX , but 3 G spots of me so far. No QSOs yet.

UPDATE 0920z:  4 G spots of me so far and nothing spotted on RX.

UPDATE 1022z:  Still just 4 spots of me this morning. The grabber at G0LRD (26km) is useful as it gives me an indication of my signal cleanliness and 2m FT8 activity.  See http://82.71.9.63:8080/cap/ .

Stations spotted
on RX

Stations spotting
me on TX
UPDATE 1801z: Amazing. Even an FT817ND and a big-wheel omni I manage to get incredible ranges on 2m FT8.

UK Airwave switch-off

Southgate News has a piece about the closure of the Airwave system, used by police and ambulance services with TETRA radios in the UK. It is reported that this will stay operational until at least 2024 because of delays to the system due to replace it. 

When I worked for Sepura (I retired in 2008) the UK police TETRA radios were an important part of our business. I am not sure what system they plan to use going forwards. I have completely lost touch in the last 5 years.

See http://www.southgatearc.org/news/2020/october/airwave-closure.htm#.X314akjYq00


Oscar 100 (geosynchronous)

Every few weeks I take a peek at the Goonhilly web SDR to check activity on the narrowband transponder. When I last checked (0810z today) it was still very quiet (just 2 European QSOs) with plenty of space.

See https://eshail.batc.org.uk/nb/

Light wave communication

Yesterday I mentioned that some years ago I bought some Flatlights (very high power LEDs) to allow me to get further over the horizon with light beam communication. Even with quite low powered LEDs I was able to achieve quite decent ranges non-line-of-sight. 

Optical communications is accessible to all and is ideal for homebrewing. All my gear was homemade and all software was free. Also, only very simple test gear is needed. As I recall a multimeter and a bearly lit LED in a dark room is about all you need. This is much simpler than microwaves. 

There is so much to be learned about optical communications. My "thing" was detecting weak signals over the horizon using PC software. What amazed me was there was no sign of the light in the sky, yet the signals were perfectly detectable on the PC as long as the RX was aimed in the right direction. I am sure much further would have been possible.

See https://sites.google.com/site/g3xbmqrp3/optical

Sunspots - Wednesday October 7th 2020

 Solar flux is 72 and the SSN 0. A=7 and K=1.

6 Oct 2020

Salcombe, Devon - NOT amateur radio

This aerial photo of where I come from in South Devon must be very old. Not sure when it was taken.