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CATS CommitteeChairman: Stuart Barber G6CJR Secretary: VACANT
Treasurer: Steve Conway G7SYO Members: Terry Giles G4CDY David Milne G6VMI
Vacancies: Currently still remains at THREE
CATS Whispers Editor: Andy Briers G0KZT
email for contributions: [email protected]
Regular Society Meetings: These are held on the second Monday of each month at:
St. Swithun's Church Hall, Grovelands Road, Purley, Surrey, CR8 4LA at 20:15 to 22:15
Society NetsSunday mornings - 11:00 - Call on 145.400 MHz ± QRM
Sunday evenings - 17:00 - Call on 3.700 MHz ± QRM * (Ex-KKC/CATS net)
Wednesday evenings - 21:00 - Call on 70.425 MHz
CATS Website www.catsradio.org Email [email protected]
Forthcoming MeetingsMonday 11th December – Annual General MeetingTuesday 9th January – Annual Club Dinner at Le Chateau, Croydon
G4FURG4FUR
COULSDON AMATEUR TRANSMITTING SOCIETYCOULSDON AMATEUR TRANSMITTING SOCIETY
M1FURM1FUR
“CATS WHISPERS”“CATS WHISPERS”
December 2017Affiliated to the RSGB
CATS are twinned with the Crescenta Valley Radio ClubGlendale California USA www.qsl.net/cvrc
Next Meeting - Annual General Meeting 12 th December
Time is running out to complete a nomination form for the 2018 Committee. But have no fear, there's still time. You have until the opening of the meeting to submit your nomination.
If there is one meeting that we should all endeavour to attend, it's this one. And if that's notenough to make you go, perhaps the offfer of wine and mince pies might just help!
CATS Annual Dinner – Tuesday 9 th January 2018
Please note that January's meeting is being held on a Tuesday. There is no meeting on Monday 8 th January .
Reservations have now been taken for the 2018 Annual CATS Dinner at Le Chateau, Coombe Lane Croydon. Those members and guests will be contacted shortly to confirm the menu etc.The cost will be the same as last year, £21.00, and although there is an extracharge of £2.50 for tea or coffee, club funds will provide that free of charge (excluding the cash difference of any specialist coffees)
In 2017, the restaurant opened specially on a Monday because they had our booking plus another significant booking. The restaurant is usually closed on Mondays. Unfortuanately for us it was not financially viable for them to open on a Monday this time round.
Please forward your booking to Stuart G6CJR who is co-ordinating our club booking.
Meeting Debrief – Monday 13 th November – CATS Quiz
CATS put out invitations to our neighbouring clubs and both Sutton & Cheam and Surrey Radio Contact Club took up the challenge. SRCC made up one team, Sutton & Cheam fielded two teams and CATS also fielded their two teams.
Terry G4CDY was the quiz master while his wife Kath was busy in the kitchen preparing hot sausage rolls for half time. CATS provided wine, beer and lemonade to the teams.
Terry made up questions for 6 rounds, including one which was to identify US states and their respective capitals. The other rounds were Easy Europe, Amateur Radio, Technology,Terribly Techie and Easy UK
SRCC “Tornadoes” S&CRS “Halfwits”
S&CRS “Fog” CATS “No Hopers”
CATS “MIX” Pt1 CATS “MIX” Pt2
There were some tough questions in the mix which certainly worked the quizzer's brains! At one point, the “CATS No Hopers” of whom I was a team member were trailing last. But, we chose to use our 3dB gain (joker) on the technical round which boosted us to 2nd overall.
At half time, we all had a break and enjoyed the prepared hot sausage rolls before we all headed back to our tables for the second half.
Our thanks go to Terry G4CDY for being our quiz master and devising a great range of questions. But also, huge thanks to Terry's wife Kath for her sterling working in the kitchen.
I guess the next round will be hosted by the winning team.... We look forward to the rematch!!
The victors, the SRCC Tornadoes with 116 points. Well done chaps!!
The 1 Ohm Cubed Question by Tom G4DFA
Judging by the groans at the quiz when Terry asked the1 ohm cube question to might be worth adding this to the news sheet, I found it on line....
Traditional of Solving the Resistor Cube ProblemThis is the cube structure consisting of 12 resistors electrically connected between the 8 vertices. Each resistor is 1 Ω, but any value can be used so long as they are all the same.
Here is where the intuition comes into play. Colour coding is used to help keep track of the resistors and associated nodes (below). Due to symmetry, the potential (voltage) at the three nodes labelled "α" are equal. Since no current flows between nodes with a potential difference of 0 V, they can be shorted together without affecting the circuit's integrity. The same can be done for the nodes labelled "β."
Once you short those nodes, you obtain the equivalent circuit shown below. As you can see, there are two sets of three resistors in parallel, in series with one set of six resistors inparallel. So, you have 1/3 Ω in series with 1/6 Ω in series with 1/3 Ω, which equals 5/6 Ω.
RF Cafe Method of Solving the Resistor Cube ProblemNow I will present my method of solving the resistor cube problem. The structure is repeated again here.
Kirchhoff's current law, which states that the sum of the currents entering and exiting a node is zero, is essential in the analysis.
The first step is to recognize that at a node where equal resistances exist, current entering the node will be distributed equally between the number of output branches - in this case three. For convenience sake, I assigned an input current of 3 amperes at the corner labelled "A," so that 1 amp will flow through each output branch. Note that 1 A flows through each branch.
On the far side of each of those branches is another node with two output branches. Again, due to symmetry, the input current will divide evenly so that ½ A flow into each branch. Looking at the cube's output node labelled "B," it is apparent that the same situation exists as with "A."
Take a moment to sum the currents into and out of each node to verify that they all add up as required.
Now that you know the current through each branch, and you know that each branch has asingle 1 Ω resistor in it, Ohms law allows you to calculate the voltage across each resistor.
The next step is to sum the voltage from input node "A" to output node "B." Any path you take travels along three edges, and all total to 2½ volts.
Finally, apply Ohms law, which says that the resistance is equal to the voltage divided by the current. As with the other analysis method, the resulting equivalent resistance is 5/6 Ω.
You can see that in reality, being able to make the assumptions in the traditional solution requires an understanding of the current division principles in my method. So, IMHO it is simpler to add voltages and then plug voltage and current into Ohm's law to arrive at the answer than to risk shorting nodes incorrectly. It's so simple, a caveman could do it.
Thanks Tom for researching that taxing quiz question!!
CATS 40 th Radio & Electronics Bazaar – Sunday 19 th November 2016 - Full Report
We once again returned back to our 2016 venue, The Oasis Academy Coulsdon in Homefield Road, Old Coulsdon which was so well received by our traders and public last year. We rebooked the Agora, which is effectively the school reception and assembly hall plus the adjacent canteen.
The Academy were kind enough to allow us some setting up time on the Saturday morning, which was a huge bonus. Stuart G6CJR and Denis M0NDJ had loaded up Denis's trailer with tables that we had been kindly loaned to us by the Banstead Scouts. Toassist, Adam G7CRQ, Glen G4FVL and Andy G0KZT were on hand to help unload at the other end.
On Sunday morning, I arrived at 8.00am to discover that some of the traders were already waiting to get in! Due to the head start we had the previous morning, that only left us the remainder of the tables to set out which were effectively stripped from the adjacent classrooms! By about 8.20am we were able to allow the traders to start setting out.
David G6VMI kindly took charge of the car parking and marshalling of the cars and wasassisted by Glen G4FVL, John G1RUV and Adam G7CRQ.
Meanwhile, Jim G4WYJ, his wife Barbara, Prue G4RWW, Janice (Stuart's wife) and Wendy, (Steve G7SYO's wife) organised thecanteen. Stuart and I were sorting out the traders and getting them assigned to their respective tables. The CATS Bring & Buy was organised by Andy G8JAC and assisted by Vince G1HRD and Peter M0PWW. Manning the entrance door was Len G0GNQ, Ed G0JOS along with is friendRoy G6DKS. Steve G7SYO provided us with an effective Public Address system andacted as our MC making announcements throughout the event.
At 10.00am the doors were opened and the assembled crowd filed in. For their £1.50 entrance fee, they were rewarded with the usual tea/coffee voucher but in addition, a free raffle ticket to win a TYT DMR handheldtransceiver. Additional raffle tickets were sold at the Bring & Buy stand. It is estimatedthat this year we had just over 200 through the door, the highest recorded figure for us.
One of the highlights was our 40th CATS Bazaar raffle. This was drawn shortly after 12.00pm. We approached the RSGB stand and asked them if they would be kind enough to officiate in selecting the lucky winner.
Mike Senior G4EFO, our RSGB Region 10 Manager stepped up to the job. The lucky winner was Jo 2E0JOZ. Many congratulations to Jo and we look forward to hearing her on DMR very soon.
So, with over 200 people through the doors, the canteen doing a roaring trade and cash generated via the Bring & Buy, plus the traders who brought a table (or two), we managedto make a significant profit for club funds.
I'd like to thank Stuart for being my co-organiser and for meeting numerous times to plan the event. I lost count of the hours we both spent on the project. But it was a team effort on the day and thanks go to all the members who gave up their Sunday to make it happen.
We are looking at booking the Academy again for the 2018 event. We have listened to thetraders and as a result we are looking at an option to hire the academy from 07.00am to allow more time for the traders to get set up. We also have plans to invite a selection of smaller dealers as another feature of The Bazaar. The provisional date is Sunday 18 th November 2018 and will be confirmed as soon as it is known.
Contest NewsHere's the line up of HF & VHF contests sourced from the RSGB Contest pages for this and next month. For more info and rules, visit http://www.rsgbcc.org/. If you're hungry for more, why not visit http://www.g8jyv.co.uk/contest_calendar.html for a list of contests as long as your arm!
Date Contest Name Timings
Sunday 3rd December 3rd 144 MHz AFS 1000 – 1600 UTC
Tuesday 5th December 144 MHz FMAC 1900 – 2000 UTC
Tuesday 5th December 144 MHz UKAC 2000 – 2230 UTC
Tuesday 12th December 432 MHz FMAC 1900 – 2000 UTC
Tuesday 12th December 432 MHz UKAC 2000 – 2230 UTC
Thursday 14th December 50 MHz UKAC 2000 – 2230 UTC
Tuesday 19th December 1.3 GHz UKAC 2000 – 2230 UTC
Thursday 21st December 70 MHz FMAC 1900 – 2000 UTC
Thursday 21st December 70 MHz UKAC 2000 – 2230 UTC
26th,26th,27th, 28th December Christmas Cumulative Contests 6m, 4m, 2m & 70cms
1400 – 1600 UTC
I am trying to collate the results of the contesting efforts of our club members who have taken part in this year's series of contests. I hope to publish these results in the January edition of “CATS Whispers”.
Meanwhile, here are the proposed dates for 2018. Do members want to field a team and set up under field conditions, perhaps some of the longer contests? G0KZT is happy to collate club member's interest.
VHF Contest Calendar 2018This calendar is provisional. All times, dates and rules are subject to change Day-by-day calendar
Date(2018)
TimeUTC
Contest Name Notes/Special Rules
Every 1stTuesday
1900-2000(Local)
144MHz FMAC
Every 1stTuesday
2000-2230(Local)
144MHz FMAC B2 (B2) , Activity contest (S8) , Club Championship (S9)
Every 2ndThursday
2000-2230(Local)
50MHz UKAC B2 (B2) , Activity contest (S8) , Club Championship (S9)
Every 2ndTuesday
1900-2000(Local)
432MHz FMAC
Every 2ndTuesday
2000-2230(Local)
432MHz UKACB2 (B2) , Activity contest (S8) , Club Championship (S9)
Every 3rdThursday
1900-2000(Local)
70MHz FMAC
Every 3rdThursday
2000-2230(Local)
70MHz UKAC B2 (B2) , Activity contest (S8) , Club Championship (S9)
Every 3rdTuesday
2000-2230(Local)
1.3GHz UKAC B2 (B2) , Activity contest (S8) , Club Championship (S9)
Every 4thTuesday(Jan-Nov
Only)
2000-2230*(Local)
SHF UKAC Activity contest (S8)Club Championship(S9)
Sun 4 Feb. 0900-1300 432MHz AFS Affiliated Societies contest (S3)Sun 25 Feb. 1000-1200 70MHz Cumulatives #1 Cumulative contest (S5)Sat 3-Sun 4
Mar.1400-1400 March 144 432MHz VHF Championship
Sun 11Mar.
1000-1200 70MHz Cumulatives #2 Cumulative contest (S5)
Sun 1 Apr. 0900-1200 First 70MHz Contest
Sun 15 Apr. 0900-1200 First 50MHz Contest Post Codes, Countries and Locators (M3)
Sat 5 May. 1400-2200 10GHz Trophy Contest Countries and Locators (M4) , Runs concurrently with the first few hours of an RSGB 24 hour event (S6)
Sat 5 May. 1400-2200 432MHz Trophy Contest Runs concurrently with the first few hours of an RSGB 24 hour event (S6)VHF Championship
Sat 5-Sun 6May.
1400-1400May 432MHz-245GHz
Contest Sun 13May.
0900-1200 70MHz Contest CW Post Codes and Countries (M1)VHF CW Championship
Sat 19-Sun20 May.
1400-1400 144MHz May Contest Post Codes and Countries (M1)VHF Championship
Sun 20May.
1100-1500 1st 144MHz Backpackers Post Codes, Countries and Locators (M3) , Special Backpackers Rules (Backpacker)
Sun 27May.
1400-1600 70MHz Cumulatives #3 Cumulative contest (S5)
Sun 10 Jun. 0900-1300 2nd 144MHz Backpackers Countries and Locators (M4) , Special Backpackers Rules (Backpacker)
Sat 16-Sun17 Jun.
1400-1400 50MHz Trophy Contest
Countries and Locators (M4) , Runs concurrently with all or part of an IARUco-ordinated contest (S7)VHF Championship
Sun 24 Jun. 1400-1600 70MHz Cumulatives #4 Cumulative contest (S5)Sun 24 Jun. 0900-1200 50MHz Contest CW VHF CW ChampionshipSat 7-Sun 8
Jul.1400-1400* VHF NFD Special Rules for VHF NFD (VHFNFD)
Sun 8 Jul. 1100-1500 3rd 144MHz Backpackers Countries and Locators (M4) , Special Backpackers Rules (Backpacker)
Sun 22 Jul. 1000-1600 70MHz Trophy Contest Post Codes and Countries (M1)VHF Championship
Sat 4 Aug. 1300-1700 4th 144MHz BackpackersPost Codes, Countries and Locators (M3) , Special Backpackers Rules (Backpacker)
Sat 4 Aug. 1400-2000144MHz Low Power
Contest
Post Codes, Countries and Locators (M3) , 25W max. transmit o/p power, (Low Power Contest)VHF Championship
Sun 5 Aug. 0800-1200432MHz Low Power
Contest
Post Codes, Countries and Locators (M3) , 25W max. transmit o/p power, (Low Power Contest)VHF Championship
Sun 12Aug.
1400-1600 70MHz Cumulatives #5 Cumulative contest (S5)
Sat 1-Sun 2Sep.
1400-1400 144MHz Trophy Contest Runs concurrently with all or part of an IARU co-ordinated contest (S7)VHF Championship
Sun 2 Sep. 1100-1500 5th 144MHz Backpackers Countries and Locators (M4) , Special Backpackers Rules (Backpacker)
Sun 16 Sep. 0900-1200 Second 70MHz Contest Sat 6-Sun 7
Oct.1400-1400
Oct 432MHz-245GHzContest
Runs concurrently with all or part of an IARU co-ordinated contest (S7)
Sat 6 Oct. 1400-22001.2GHz Trophy / 2.3GHz
Trophy
Runs concurrently with the first few hours of an RSGB 24 hour event (S6)VHF Championship
Sun 21 Oct. 0900-1300 50MHz AFS Contest Post Codes, Countries and Locators (M3) , Affiliated Societies contest (S3)AFS Super League
Sat 3-Sun 4Nov.
1400-1400 144MHz CW MarconiRuns concurrently with all or part of an IARU co-ordinated contest (S7)VHF CW Championship
Sun 2 Dec. 1000-1600 144MHz AFSAffiliated Societies contest (S3)AFS Super League
26-29 Dec 1400-1600Christmas Cumulatives
Contest Countries and Locators (M4) , 1 Point per QSO (S1) , Cumulative contest (S5)
Times marked with a * denote times vary per band
HF Contests 2018This calendar is provisional. All times, dates and rules are subject to change
Date (2018)TimeUTC
Contest Name
Sun 7 Jan. 1400-1800RSGB AFS 80m-40m Contests CW HF Championship AFS Super League
Sat 13 Jan. 1400-1800RSGB AFS 80m-40m Contests Phone HF Championship AFS Super League
Sat 20 Jan. 1400-1800RSGB AFS 80m-40m Contests Datamodes HF Championship AFS Super League
Mon 5 Feb. 2000-2130 80m CC SSB Sat 10 Feb. 1900-2300 1st 1.8MHz Contest HF ChampionshipWed 14 Feb. 2000-2130 80m CC DATA Thu 22 Feb. 2000-2130 80m CC CW Mon 5 Mar. 2000-2130 80m CC DATA Sat 10-Sun 11 Mar.
1000-1000 Commonwealth Contest HF Championship
Wed 14 Mar. 2000-2130 80m CC CW Thu 22 Mar. 2000-2130 80m CC SSB Sun 1 Apr. 1900-2030 RoLo SSB HF ChampionshipMon 2 Apr. 1900-2030 80m CC CW Wed 11 Apr. 1900-2030 80m CC SSB Thu 26 Apr. 1900-2030 80m CC DATA Mon 7 May. 1900-2030 80m CC SSB Wed 16 May. 1900-2030 80m CC DATA Thu 24 May. 1900-2030 80m CC CW Sat 2-Sun 3 Jun. 1500-1500 NFD Mon 4 Jun. 1900-2030 80m CC DATA Wed 13 Jun. 1900-2030 80m CC CW Thu 28 Jun. 1900-2030 80m CC SSB Mon 2 Jul. 1900-2030 80m CC CW Wed 11 Jul. 1900-2030 80m CC SSB Sun 22 Jul. 0900-1600 Low Power Contest HF ChampionshipThu 26 Jul. 1900-2030 80m CC DATA Sat 28-Sun 29 Jul.
1200-1200 IOTA Contest
Sat 1-Sun 2 Sep. 1300-1300 SSB Field Day Mon 10 Sep. 1900-2030 Autumn Series SSB Wed 19 Sep. 1900-2030 Autumn Series CW Thu 27 Sep. 1900-2030 Autumn Series DATA Sun 7 Oct. 0500-2300 DX Contest HF ChampionshipMon 8 Oct. 1900-2030 Autumn Series CW Wed 17 Oct. 1900-2030 Autumn Series DATA Sun 21 Oct. 1900-2030 RoLo CW HF ChampionshipThu 25 Oct. 1900-2030 Autumn Series SSB Sat 10 Nov. 2000-2300 Club Calls (1.8MHz AFS) AFS Super League Mon 12 Nov. 2000-2130 Autumn Series DATA Sat 17 Nov. 1900-2300 2nd 1.8MHz Contest HF ChampionshipWed 21 Nov. 2000-2130 Autumn Series SSB Thu 29 Nov. 2000-2130 Autumn Series CW
Rallys & Events
25 February 2018 BRATS Medway Radio RallyVictory Academy, Magpie Hall Road, Chatham, Kent ME4 5JB.Open 10:00/09:30 to 14:00. Entry £2.50. Free parking. Trade. RSGB books.Talk-in 145.550 MHz by GB4RRR. On-site catering.Details: Hugh H, G0BRC, 07825 838877 [email protected]
15 April 2018 West London Radio & Electronics ShowKempton Park Racecourse, Staines Road East, Sunbury on Thames, TW16 5AQ.Open 10:00/09:50. Talk-in. Free on-site parking. Trade. B&B. SIGs. Lectures.Raffle. On-site catering.
Details: Paul, M0CJX, 0845-165-0351, [email protected]
http://www.radiofairs.co.uk
Other Club News & Contact Information
Club newsletters are regularly posted via email to members. What follows is a summary of local club meetings .Please either visit the respective club's website/secretary/newsletter for up to date programme information.
BROMLEY & DISTRICT ARSWebsite: www.bdars.org.uk
Email: [email protected]
Club Net: Wednesdays 9:00pm - meet on 145.500 MHz FM and QSY
Meetings: 3rd Tuesday of every month at Victory Social Club, Kechill Gardens, Hayes, Kent, 19:30 for 20:00.
19th December – Quiz & Mince Pies17th January – AGM21st February – SUSY Radio by John Stockley G8MNY
CRYSTAL PALACE & DISTRICT RADIO SOCIETYWebsite: www.qsl.net/g3oou/ or http://www.g3oou.co.uk/
Club Net: Wednesdays 20:00 on 145.525 MHz
Meetings: 1st Friday at All Saints Parish Church, Beulah Hill at 19:30
1st Dec - Christmas Social5th Jan – Video Evening2nd Feb - AGM
CRAWLEY ARCWebsite: www.carc.org.uk
Meetings: Every Wednesday at Hut 18, Tilgate Forest Recreational Centre, Tilgate Forest, Crawley from 19:30, and Sundays, 10:30 to 13.00.
8th Dec – Annual Fish & Chip Supper24th Jan – Annual General Meeting
CRAY VALLEY RSWebsite: www.cvrs.orgContact: Richard Cains G7GLW [email protected] Net - 10m Sunday morning net @ 10:00 local: 28.570 MHz +- QRM4m net – Fridays in weeks where there is no club meeting @ 20:30 local: 70.450MHz, thenQSY to 70.425 or 70.475MHzMeetings: 1st and 3rd Thursdays at 1st Royal Eltham Scouts HQ, Rear of 61 - 71 Southend Crescent, Eltham, London, SE9 2SD.
7th Dec – Amateur Radio At The Movies
DORKING & DISTRICTWebsite: http://www.ddrs.org.uk Email: [email protected] Contact: George Brind, G4CMUClub Nets: Sunday 08:15 on 3.770 MHz & Thursday 20:00 on 144.775 MHzMeetings: Friends Meeting House, Butterhill, South Street Dorking at 19:30
HORSHAM ARC
Website: www.harc.org.ukClub Nets: Saturdays 21:30 on 144.725MHz and Sundays 10:00 on 3.722 MHzMeetings: 1st Thursday at The Guide Hall, Denne Road, Horsham, Sussex
Sunday 26th November - Sunday Morning Fox Hunt
7th Dec – Annual General Meeting
MID SUSSEX ARSWebsite: www.msars.org.ukClub Nets: Sundays 08:00 on 3.740 MHz and at11:00 on 145.350 MHz, Wednesdays 20:00 on 145.350MHz and Daily 13:30 on 21.330 MHzMeetings: Every Friday at Cyprus Hall, Cyprus Road, Burgess Hill, West Sussex for 19:45
Fri 8th Dec – On Air NightFri 15th Dec – Christmas Quiz
SURREY RADIO CONTACT CLUBWebsite: www.g3src.org.ukContact: John Simkins G8IYS Tele:020 8657 0454 email [email protected] Club Net: Sunday 09:30 on 1905 kHz , 70.300 MHz Thursday 8:00 pm, 145.35 MHz +/- 25kHz Friday 8:00 pmMeetings: 1st & 3rd Mondays at Trinity School, Shirley Park, Croydon CR9 7AT 19:30 for 19:45.
Mon 8th January – SRCC Construction Contest
Sutton & Cheam Radio SocietySutton United Football Club. The Borough Sports Ground, Gander Green Lane, Sutton, Surrey, SM1 2EYWeb site: http://www.scrs.org.uk General Enquiries e.mail: [email protected] – Wednesday 20.00hrs 145.500 MHz , Saturday 10.00 7.125 MHz, Saturday 11.00 145.500 MHz
14th December - Christmas Junk Sale18th January - An introduction to morse code by Dan Romanchik KB6N15th Febuary - Digital Voice – Martin Rothwell M0SGL and Chris Howard M0TC
Wimbledon & District Amateur Radio SocietyMeets on the 2nd and last Friday in the month at Matin Way Methodist Church Hall, Martin Way Merton Park, London,SW19 9JZ at 19:30hrs for 20:00hrs. Contact: Andrew G4ADM on 020 8335 3434 or andrew.maish(at)ntlworld.com
So that's it!
I have now reached the end of my very last newsletter. But before I hand the reins over to David G6VMI, I would like to thank all of those contributors who have sent in articles and photographs which as well as saving me from having to write stuff, but also enriches the newsletter and makes it something attractive to read. I have been unable to attend as many meetings this year as I would have liked, some which is down to work commitments but also family things too, My daughters both have a full program of activities that I want tosupport, and one has to prioritise the amount of time available. But this has led to empty spaces where I had insufficient material to debrief the topics of those meetings.
I wish every success to David and look forward to seeing his revamped 2018 “CATS Whispers”.
Submissions are most welcome from CATS members, Local clubs and societiesCATS Whispers is published monthly by Andy Briers G0KZT on behalf of the
Coulsdon Amateur Transmitting Society. © CATS 2016
CATS fully support the RSGB Child Protection Policy
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