All posts by John Gumb

GB3BN net 8pm 26th MARCH – A Summary – thankyou!

On the evening of what should have been the spring junk sale 2020, postponed due to COVID-19, we had a net on GB3BN with 23 stations joining. Now, more than ever, communication is important . We did that in spades.

I thoroughly enjoyed running the net. It was fantastic to combine getting on the radio and having a club meeting. Looking back, we really did that using the technology we love. At 8pm, I didn’t know that would happen. All I had was a beer and the radio by my side. By 10:30pm I had a list of 22 callsigns (with ticks against them, finally, to indicate signout) and it really felt like the end of a normal club meeting, or even better because everyone took part and contributed. This virus will not stop us.

Operating procedures were first class. Everyone. No exception. New M7 operators/callsigns? Flawless.

Because it was so productive, I thought I’d try and capture a few points.

Firstly, it was wonderful to be able to collectively say THANKYOU to our magnificent NHS together, on air, using BN’s huge coverage area.

Other:

  • In these uncertain times, this net is a place where we can all gather on 2nd and 4th Thursdays where we would have had a face to face club meeting. To ‘check in’ if you like.
  • Following on from the BATC’s support for online meetings and their offer of support for clubs, it is clear they are something RADARC needs to pursue. In particular, a number of members enjoyed Noel G8GTZ’s QO100 talk.
  • Lots of practical tips for surviving the ‘lockdown’.
  • Finding out about other nets (eg. G1RAF has a net on GB3TU 433.225MHz: 12:00 and 19:00 daily).
  • Discussion about new conferencing technologies: eg. zoom, discord.
  • Propagation news: HF, VHF. There are some signs Sporadic E is starting on the high HF bands and 50Mhz. The Poldhu net on 80m was in fine fettle.
  • Virtual sharing of beer and biscuits (Jammie Dodgers no less) in the finest Reading tradition. (There should be bulbs in there also – gardening did feature).
  • Updates on construction projects – reports of exploding tantalum capacitors.
  • The trials of home working.
  • Clarification on how the local repeaters work with CTCSS. You get a ‘T’ in morse if you’re running CTCSS, ‘K’ otherwise. Soon, I think, you’ll need to run CTCSS. see http://www.tvrg.org.uk/ for details.
  • Our ‘YouTube’ channel with videos of previous talks (thanks to James 2E0JPM) is https://www.youtube.com/channel/UChamISEy8HRvKmWN0-GTWpA
  • Loads more. If I’ve missed anything you would like included here then please let me know.

Thankyou for a special evening.

73

John

G4RDC

The net:

Bill G4WJS

Dave G0TKV

Graham G3XYX

Michael M0MPM

Jim G0LHZ

Tom M0LTE

Mike G4CDF

Simon M0ZSU

Nick G0LGG

Sergei M0TLN

Gareth M7GRB

Vin G4JTR

Denis G4KWT

Tom 2E0YGW

Robin G4IWS

James 2E0JPM

Chris G4CCC

Guy 2E0GDC

John M5ET (echolink)

Sean 2E0ZIP

John M7IJV

Loz G2DD

John G4RDC

Apologies for getting any callsigns wrong. Now you can see why. The raw material for this post.

6 more intermediate passes!

I am delighted to announce further intermediate level success at RADARC.

Left to right:

Graham Walker, M7MRG

John Holden, M7AHY

Kim Hiscock

Ray Brown G3SCZ (RADARC training guru)

André Broodryk, M7VWB

Graham Aisbitt, M7GRA

James Wynne

Ray’s T-shirt says ‘I can explain it to you, but I can’t understand it for you’. Clearly both activities happened with great success so well done to all!

A particular thank-you to Ray for all the preparation and hard work that goes into making events like this happen – also to everyone supporting him.

Callsigns to be updated in due course.

73, John G4RDC.

RADARC Secretary.

Reading Science & Tech Meetup Groups Summer Gathering – Tuesday 13th August 2019

There is a gathering of local tech/creative groups on Tuesday 13th August at the Walkabout pub (upstairs) in the centre of Reading, Friar st.

Wiston Terrace (off Friar Street) Reading RG1 1DG

see https://rdggeeknight.wordpress.com/ for details

The aim is to promote awareness of all the good stuff going on in Reading.

Someone from each group will say a ‘few words’ about who they are and what they do. Here are some of the groups:

  • Agile Valley
  • British Computer Society (Reading Branch)
  • ConnectTVT
  • Google Developer Group Reading & Thames Valley
  • IET Berkshire
  • Innovation Catalyst
  • Missing Maps
  • PHP Berkshire
  • Reading and District Amateur Radio Club
  • Reading Data Science Group
  • Reading Hydro
  • Reading Tester Gathering

Hope to see you there.

Thanks to Simon and “Reading Geek Night” for organising this.

73

John

G4RDC

“ACE HIGH” Tropo Scatter system

While researching for club talks, I ran across the following link regarding the tropo scatter system used in the 1970s/1980s with eye watering ERPs. A few members will know about this system, however many new to the club may not:

https://www.subbrit.org.uk/features/ace-high-nato-communications-system

Like Graham, G3XYX I have visited the Stenigot site in Lincolnshire wolds (in itself an incredibly beautiful place) – sadly only one dish remains now. Possible club talk if anyone knows a speaker…?

meeting 14th February – TELL US WHAT YOU’RE UP TO!

14th Feb Woodford Park meeting is a chance for us to catch up on the
various projects/activities we’re up to – in particular any follow ups
to the Great Construction Contest but not limited to that.

If you’d like a short (5 minute or so) slot let me know.

Doesn’t have to be stuff – could be contest updates or how RADARC
contributes comms to events like 3 towers etc.

Also – what would you like to see and I’ll try and arrange?

We can take contributions on the fly on the evening if need be.

  • Min G0JMS will kindly bring along a RigExpert HF to VHF SWR meter (Digital display) RigExpert to show you and VHF to UHF swr power meter (Cheap unit) which includes frequency. He will also do a brief demo of Yaesu Fusion – Wires X technology RF paths permitting.

If necessary, I’ll bore you for a few minutes before the bottles and
tomatoes start flying:

  • Geostationary satellite project – es hail 2. Mike G4CDF (and possibly others???) is making the running on this one but I will present on his behalf a very short overview. iirc it’s 2.4GHz up and 10GHz down. tx/rx is based on an SDR transceiver (lime sdr mini).
  • Adventures with FT8 internals and taxi radios (generating FT8 tones by pulling a carrier around) – update. TBH anything that generates a stable carrier and can be pulled a bit maybe down to 1Hz resolution looks like it might work – eg. voltage controlled oscillator.
  • cheap RTL-SDR dongles (£15 delivered). Mine does work but probably better to get the real ones rather than fakes like mine.
  • short gnuradio demo (maybe)

We’ll have the ICOM IC7300 out for people to have a play with and the spectrum analyser.

Tea, coffee and biscuits will be in plentiful supply all evening.

Looking forward to hearing from you.

73

John

G4RDC