Next meeting (22nd November) Simon Watts G3XXH joins us to give us a brief history of RAF ASV radars from 1940 to 2010. (ASV = airborne surface vessel, radar for maritime patrol aircraft)
Venue: Woodford Park Leisure Centre, Woodley, RG5 4LY
The history of airborne radars developed in the UK for long range
maritime surveillance by the RAF spans from 1940, when ASV Mk. I entered service on Sunderland and Hudson aircraft, through to the 1980s, when the Searchwater radar entered service on the Nimrod MR2. This history came to an end in 2010 when the Nimrod MRA4 programme was cancelled and the Nimrod MR2 taken out of service. The early radars operated at VHF. Following the development of the high power magnetron, operation moved to S-band and then to X band. Searchwater was a complete departure from earlier radars, incorporating a TWT transmitter, modern signal and data
processing and computer control.
This talk will give an overview of the design and evolution of these
radars, the aircraft they were used in and the performance they
achieved, detecting ships and submarines.
Simon Watts G3XXH is Visiting Professor in the department of Electronic and Electrical Engineering at University College London and formerly deputy Scientific Director and Technical Fellow in Thales UK.
Whilst googling ‘ASV’ I found this interesting link:
Min G0JMS also spotted “The Secret of Tuxedo Park” on PBS America talking about the development of radar by Wall Street tycoon Alfred Lee Loomis:
Firstly to Robin G4IWS for hosting yet another successful event.
Also to EVERYONE who entered, but in particular a callout to two first time entrants:
Guy 2E0GDC: “electrical noise detector”
Bernard M0PIK: “Iambic CW Key – Capacitive Touch” (homebrew PCB + surface mount) + inspirational talk on surface mount and making PCBs.
Michael M0MPM: shaver mic adaption. Now, if you google that, you may come up with “pye shaver mic”. Believe me, it wasn’t that. Mike gave us a beautiful light hearted short talk encouraging us to check the legal aspects of using fist mikes whilst mobile. And shavers.
Dave G4BOO: compact MF/HF receiver
Robin G4IWS matchbox sized TTL two tone oscillator
Guy 2E0GDC: electrical noise detector
Mike G4CDF: multiband SHF antenna feed (1.2/2.4) demonstrated using the club’s new spectrum analyser + VSWR bridge.
Bernard M0PIK: surface mount CW paddle circuit and homebrew PCB. (3rd).
Michael M0MPM: shaver mic adaption/hybrid
Jim G0LHZ: remote control ATU (1st)
John G4RDC: FT8 from mc micro taxi radio (2nd)
If I missed anyone or got anything wrong my apologies – let me know and I’ll fix it.
Jim deservedly took first prize and I was very deeply honoured to take second place.
Most importantly we have ideas, enthusiasm and passion for what we do which will undoubtedly result in more developments next year.
I will make sure we have other events during the year where people can share what they are up to.
If anyone has pictures, send them to me and I’ll put them up.
It’s the RADARC Construction Contest on Thursday 8th November!
Venue: Woodford Park
Start time: 8pm
TWO trophies to be won (1st and 2nd prize).
Just bring your “thing” along on the evening in good time (plan to arrive before 7:45pm) to get a place on the tables. If you need the projector (eg. for a video or a software entry) then please let me know.
Depending on number of entries, expect 5-10 minutes or so to present your entry.
Entries so far:
A multiband microwave antenna feed: Mike, G4CDF
Guy 2E0GDC: an electrical noise detector
Bernard M0PIK: CW dual paddle iambic key using SMD components
Simon M0ZSU: Construction group update
Jim G0LHZ: Mystery software entry (now with one less bug)
Robin G4IWS: Two tone test oscillator to check audio distortion on an HF rig
Adventures with FT8 and an FM taxi radio: me
Both Mike and I still have work to do so you’ll be in with a very good chance.
Have a go and support your club!
Many thanks to Robin G4IWS for running proceedings.
Homebrew Asda biscuits, tea and coffee afterwards as usual.
Website for the Reading And District Amateur Radio Club