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CUWS Activates GB21YOTA for Youngsters On The Air Month

Seven CUWS operators: M0IPY M0RNN M0ZCJ M0TKU M0WUT M0UXP and M7BBR made 800 SSB QSOs using the special callsign GB21YOTA on December 3rd and 4th. One operating position was dedicated to 20m using the SteppIR and the other to 40/80 using verticals.

CUWS Chair Nikolas M0IPY was one of the first ops:






He was joined by Edwin M0RNN:

Day Two saw the arrival of Charlie M0ZCJ Anna M7BBR and DanielM0TKU:

And the final shift was Dan M0WUT and Stephen M0UXP:

Welcome Back for Michaelmas 2021

Welcome back for Michaelmas Term 2021. If you would like to receive more information about CUWS please email and ask to be added to our email list. Activities have been at a low level for the last 18 months due to Covid but we hope to reintroduce some meetings later this term. The radio shack remains fully available 24/7 and we will be doing a number of contests there during the term. Some are weekday evenings and others at weekends. Check the online calendar for more information. If you are interested in the radio licensing exams please email All exams are available online with remote invigilation and CUWS can lend you the exam manuals.

CUWS Members in YOTA Contests

The first two YOTA Contests took place in May and July. During the first event 5 members used the club’s short contest call M4A. Ops included Anna M7BBR, William M0WJE, Dan M0WUT, Daniel M0TKU and Charlie M0ZCJ.

Dan and Charlie operating.

William and Daniel operating.

For the second contest Nikolas M0IPY, Daniel M0TKU, Edwin M0RNN and Vasily M0VMA used their own callsigns sequentially.

Nikolas M0IPY

Daniel M0TKU

Edwin M0RNN

Vasily M0VMA

The final event will be December 30th if anyone is around. CUWS also plans to participate in YOTA month with the GB21YOTA callsign in early December.



CQWW SSB Contest October 2019

The CUWS Team achieved first place for England (and the UK) in the multi-op single transmitter category. Normal antennas at the shack were supplemented with a 40m 4-square, 80m vertical, and 15m monobander on a SCAM 12 tower (Tnx M0LCM).

ZC4UW Cyprus Sovereign Base Area Operation

Six members of the Society and one guest were active from the western Sovereign Base Area on Cyprus from 2-8 January 2020. A record (for CUWS) 26,000 QSOs were made from 160-15 metres (including a handful on 12/10/6). Modes used were CW, SSB, and RTTY. The team used 4 Elecraft K3/KPA500 stations and one KX3/Juma combination. The antennas were: 160m inverted L, 80m quarter wave, 40m quarter wave, 30m ground plane, 20m ground plane, 17m vertical dipole, 15m vertical dipole. For 60m either the 160 or 80 metre antenna was used. The QTH was a beach cafe that had closed for the winter. The team picture is below. Ops from left to right were: Michael G7VJR, Rob M0VFC, Simon G7SOZ, Martin G3ZAY, Stavros 5B4AFM / M0BBB, Dan M0WUT and Dom M0BLF.

The ZC4UW Team

December 1st & 6th – Youngsters on the Air Activation

CUWS hosted two 8 hour slots in the December activation of GB19YOTA for Youngsters on the Air. 1000 QSOs were made, mainly on 40 and 20 metres CW and SSB.

Dan M0WUT kicked things off on 20m CW:

He was joined shortly afterwards by Charlie M0ZCJ on 40 SSB:

Next up was Nikolas M0IPY on 20m SSB:

And William M0WJE on 40m SSB (20m CW later):

William introduced Jared KC1LZJ to the sound of the bands from this side of the pond:

And Aly M0WSE finished off on 20m SSB:


22 Oct 1900: Jossy Sayir: “Information Storage on DNA”

22 October 1900, LR5, Cambridge University Engineering Dept.

Dr Jossy Sayir, a lecturer and researcher at Robinson College, Cambridge, will address the society on his research. It promises to be a most entertaining and engaging lecture.Graphic with DNA helix and binary data

There is a lot of digital information in the world — about three zettabytes’ worth (that’s 3000 billion billion bytes) — and the constant influx of new digital content poses a real challenge for archivists. Hard disks are expensive and require a constant supply of electricity, while even the best ‘no-power’ archiving materials such as magnetic tape degrade within a decade. One solution is to use DNA: a compact, robust molecule, as a storage medium. We call this DNA storage. The talk will introduce the technology for writing and reading DNA, cover data preparation and retrieval. It will also include an activity where participants will get to encode and decode their own messages into DNA in the form of coloured Lego pieces.





(UPDATE – Based on claimed raw scores we are 1st in the U.K. in the Multi-Single category.)

A team of operators manned Woop Woop 3 for the CQWW SSB Contest over the weekend of October 27/28. 2443 contacts were made for a claimed score of just over 2.3M points in the Multi-Single category. The 40m 4-square antenna and the 80m vertical will probably be left up for members to use over the winter.

The antennas are shown below: 80m vertical, 40m 4-square, 5 element 15m Yagi on 40ft SCAM, and regular 3 ele SteppIR in distance.

Life Member Rob, G3YZO, operated and brought along this picture of the original Woop Woop building in Grange Road which the club vacated in 1970. It was an ionospheric research lab before it was taken over by CUWS. Note that it wasn’t the first club shack – that was in the Old Cavendish in town.

CUWS Uses G6XX during the World Cup – June 2018

CUWS used the special RSGB Contest Club callsign G6XX on a couple of days during the football World Cup Championship in June. Ops included G3ZAY, M0WUT, M0ZCJ, G7VJR, M/KD2LXA, 2E0FFC, 2E0XSM, M0VFC, M0WJE, M0BLF, and M1BXF. Around 1500 contacts were made with up to 3 stations QRV simultaneously.

Dom, M/KD2LXA operating as G6XX.

Rob, M0VFC with the third operating position (K3 + Juma amp) on 18MHz.

Charlie M0ZCJ on 14MHz.

Sean 2E0XSM using G6XX

David 2E0FFC using G6XX

The event finished with the annual CUWS BBQ.

Michaelmas 2012

Welcome to all our members, old and new, to the new year.

There are a number of activities planned this term, with more to come.

Firstly, to our new members, if you haven’t yet had a chance to visit the shack contact Martin G3ZAY who is arranging visits. Also anyone who is interested in taking any level of Amateur Radio exam in Cambridge (student or not) should contact Martin for details.

At the end of October is the CQWW DX SSB contest, in which we usually make a competitive entry (for the past two years we have set new English records in our category). Contact Dom M0BLF for more information or to find out how you can get involved with operating.
If you want to see what the contest is about, but don’t fancy operating, then feel free to come along to the shack any time on the 27th or 28th October to see the contest in action.
Volunteers are also needed the weekend before, and the Monday and Friday either side of, the contest to assist in erecting and then dismantling the additional antennas we use for the event.

If you would like to start contesting with something a bit easier, we also enter the weekly RSGB UKAC – these are contests on VHF and UHF bands which last for 2.5 hours every Tuesday evening. Feel free to come along and join in (or just watch!)

Also this month is the annual RSGB convention, to which a number of our members will be going and some presenting. There are a number of talks on a variety of subjects, and tickets are available on the door if you are interested in joining them.

Finally, every Thursday we have an informal meeting in the Maypole pub at 8pm, which is a great chance to get to know fellow amateurs in the area. It is also a great chance to ask questions about almost anything technical – our members have interests and expertise ranging from mathematics to electronics, engineering and computer science!

If you have any questions, please feel free to contact me at

William (M0ZXA)
CUWS Chairman