Way back in September 2023 Chris G0EYO (our beloved mentor) put out a request from Jon MI6XGZ to see if anybody would repair his deceased father’s (callsign GI3ZX) S640 as he would like it to be working so he could use it for old times sake. As MI6XGZ obviously lives in N.I. and me living just over the water in Southern Scotland, I responded and arrangements were made for a friend visiting MI6XGZ living in Central Scotland to drop it off as he passed the door from the Stranraer ferry. It was duly dropped off in January and put in the workshop for attention.

Now MI6XGZ’s deceased father, Desmond, has an interesting history in his own right. Licensed well before 1939 he was conscripted into the VI service at the start of WW2 and formally moved to the RSS secret listening station in N.I. GILNAHIRK where he stayed until de-listed in 1947. He passed away in 1984 and Jon MI6XGZ kindly scanned the final pages of his father’s log book from 1937 showing who was on the air then and the final entry before receiving official orders to go QRT. The log pages are shown below.

 

As soon as the set was received the bench was cleared and the transport box was opened and yes there was an Eddystone S640. However, it had a long large umbilical cord coming out the back with an industrial size plug on the end. Ok, could be a link to a transmitter or something.

Lifted it onto the bench and the front was from a 640 but looked very modified and the obvious give away should have been a microphone socket on the front panel!!. Eventually opening the lid (seized due to rust) sitting looking up at me was a pair of TT21 PA valves. Strange???

Both tuning capacitors had been removed and a small 30pf variable installed in their place. The coil pack instead of having the two valves (EF39 and 6K8) had 7 B9A valves and the I.F panel had its top

chassis cut away and  removed and in its place was a series of relays and what looked like filters of some sort or other.

This S640 was obviously a transmitter built into a 640 case and chassis. The construction was a masterpiece of ingenuity to squeeze a 13 valve transmitter into a 640 case. So why the umbilical cord then?. Was this for the power supply and modulator for AM? Could be.

Removing it from the case caused more intrigue. The coil pack had been stripped of all its previous coils and poking up were a couple of crystals 8998 and 9001khz. Turning the set back over and cleaning a filthy small box revealed a crystal SSB filter at 9MHz so we must have an SSB transmitter,

It gets more amazing! There’s a loudspeaker on the back of the front panel, chasing the modules through not only do we have a transmitter made out of a 640 but we also have a receiver built in as well. A quick look about confirms that we have a 80/20metre SSB transceiver built into and on a S640 chassis and case.

I decided not to put power onto it as; a) I would have had to build a power unit and b) as it must be over 50, probably 60 years old, heavens knows what would have blown up!!.

So there you have it. Not only a wonderful piece of engineering expertise but craftsmanship as well. Pity we don’t have people like GI3ZX about these days when it’s so easy to buy a transceiver. Hope you have enjoyed this little story.

Roy GM4VKI

Phil G4OBK in Pickering, North Yorkshire is helping the family of Malcolm G3KEV of Scarborough who went Silent Key last month at the age of 87 dispose of his amateur radio equipment gear. The money raised is going to the Yorkshire Air Ambulance Service and Phil is on his way to raising at least £2000 from the sale of Malcolm’s gear for the charity.

 

 

Phil is offering an Edometer S902 Mk2 in excellent condition, complete with carry box, the seven coils and the original manual (see pic – more photos are available from Phil). Phil has checked to see that the PP3 battery had previously been removed and that there was no contamination inside the unit.

 

He fitted a new PP3 and checked that the unit does function as a signal generator. He also checked that the fixed 1000 Hz audio tone output was available on the right-hand side headphone socket but he hasn’t tested the other unit functions.

 

Bearing in mind that the proceeds are going to charity, Phil is inviting bids for this item and has put a deadline of Saturday November 4^th for anyone wishing to make an offer for this historic Eddystone Item, without which no Eddystone collection would be complete. If you are interested in making an offer or wish for more details contact Phil by e mail on cq@yorkshirewalker.co.uk  UK delivery only unfortunately. Shipping can be arranged via Royal Mail 48 tracked for £7 but collection from Pickering is also acceptable.

 

 

Those of you who have read Victor’s previous articles, especially the one on his Eddystone 888A restoration, will know that they make very interesting and informative reading. Victor is a man who knows his way around RF circuits and has a passion for getting the best out of his receivers which he uses on a daily basis for shortwave listening. Victor has now written up his work in refurbishing an EA12 so that he could get the best performance out of it. A fascinating read and I am sure many readers will enjoy and benefit from his experiences and expertise. You will find the article in the Restoration folder but you can download if from here.

Eric White in Worcestershire UK is looking for an  Eddystone EC10  Receiver (1963/1965) in good condition, although can be none working. If you can help Eric please contact him via email   eewhite359@btinternet.com

 

 

 

Dean Preziosi of Shirley, Massachusetts, USA is seeking a left frame panel and disc set cover for an Eddystone 958/3. He has included a picture of the receiver showing the left side minus the two pieces. Please contact him at

tonym4704@gmail.com if you can help out. 

 

 

 

 

 

 

In recent months I have discovered a number of Facebook sites which show pictures of the radio rooms of various merchant marine ships. Eddystone supplied a number of Marine Radio Communications companies, throughout Europe with Eddystone receivers. Usually they were badged under the name of the company (MIMCO, Debeg, Hagenuk etc) who supplied and had responsibility for the radio equipment, and the provision of the ship’s radio officers. The role of Radio officer was phased out in the 1990’s with the introduction of the Global Maritime Distress and Safety System which was a maritime communications system used for: emergency and distress messages. vessel-to-vessel routine communications. vessel-to-shore routine communications, Radio Officers often retrained as Technical or Engineering Officers and stayed in the Merchant Marine or took land based jobs.

I like to see if I can recognise sets of Eddystone origin in some of the FB pictures. EC958s and S830 seem to be the most popular main receiver with S1002 taking the role of the reserve receiver. There is also a Eddystone Radio Owner’s FB page which whilst nothing to do with the Eddystone User Group does throw up some interesting sets that are still in use by their current owners. The links to FB pages are shown below.

A friend of Gerry O’Hara VE7GUH sent him the photo below of an S880/2 together with a Marconi Atalanta, mounted in an unusual shallow-angled console aboard the ‘Tonga’, a bulk carrier vessel operated by Wilh. Wilhelmsen in Norway, in the late 1960’s. Gerry thought having S880/2 on a ship was unusual?  This was found on the Marine Radio Group site (see below)

 

I found the following picture of a very young operator in charge of the radio room of a supertanker with the callsign A8VD with what are clearly two S830 sets on the FB page of the The Marconi International Marine Communications Company (URL below)

 

 

The picture below shows Norwegian Ship MV Kingsville with Radio Officer Per Mikalsen operating another S830 which was published on the Maritime Radio Group FB page

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This picture shows Radio room on the Pride of Bruges with a Main Receiver Marconi Marine Pacific X (Rebadged Eddystone EC1837- and I think a S1002 reserve receiver to its left).

Have a look at these Facebook pages;

The Marconi International Marine Communications Company https://www.facebook.com/groups/62027358433

Marine Radio Group  https://www.facebook.com/groups/148087645522509

Eddystone Radio Owners https://www.facebook.com/groups/151222598354706

Radio Officers https://www.facebook.com/groups/sparkslist

Eddystone AW-2 User and Radio Constructor Group https://www.facebook.com/groups/702709910330466

Enjoy the hunt for “Eddystones”

Chris G0EYO

EUG Admin

Those of you who are members of the Eddystone User Groups.io forum will have seen the generous offer on17/3/23 from Andy in  Northumberland of a S640 receiver and S688 speaker Free of Charge to someone who would give it the TLC it deserves. Following his mother’s passing Andy had found the receiver, which belonged to his father, whilst clearing her loft space and he remembers having it in his bedroom as a youngster more than 40 years ago. The set and speaker were quickly claimed by Mike who lived in the same area  and picked up by him the same day.

 

 

 

 

 

 

 

Mike contacted me to confirm he had picked up the sets and sent in few photographs of himself with his  S940, which he bought new in 1968, waiting for BBC World Service to come on air whilst working in Boston, Massachusetts in 1971. The second picture shows Mike, repairing the RF stage on that same S940 in Northumberland 40 years later. The third picture shows Mike’s impressive collection of Eddystone sets.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

My collection moving from left to right an 850/4, my 940 under repair, an “as new” 830/7, an EA12, 770 MkIIR and 770U MkII and an 840C.

Intrigued by such a layout, I asked Mike if he would give us some history about his love of Eddystone’s. He graciously obliged.

Mike’s Story

“I purchased my 940 from Aitkin Bros in Newcastle in late 1968. I had seen a 840C in their window along with a couple of the smaller transistorised models. Aitkins was where we went in Newcastle to buy valves and other radio and TV components and even to get valves tested for a fee. So after some thought I went in and put a £5 deposit on a 840C. But I picked up some brochures at the same time which included one on the 940. So I went back and changed my order to the 940. When it came in I carried it home on the bus with some difficulty. Later I ordered a plinth speaker directly from Eddystone. Around that time I saw an advert in Wireless World which covered the 830,770R and U so I always wondered about them.

 

Then I was transferred by my employer to the United States near Boston where I lived for many years and took my 940 with me, originally working in Image Analysis Scientific instruments and later in NMR (Nuclear Magnetic Resonance) and MRI which are both radio frequency technologies. Whilst in the US the BBC sent me a monthly program and that is what I have in my hand in the photograph.

 

I was repairing the RF stage on my 940 after Gerry O’Hara had asked me to make some voltage measurements for him. I had not been using my 940 for other than local radio stations at the time and had not realised that there was a fault but in checking for Gerry I found the usual out of spec carbon resistors so set about replacing them using Graham Wormalds tips for this awkward job. I had gotten to know Gerry when I appealed for some help with the repair of my 770U MkII and Gerry replied. Later by chance both of us together would be replacing and tuning new turret coils at the same time. In my case the Band 3 and 6 coil substrates had deteriorated and crumbled through damp. I did more work on my 770U MkII than any other radio tracking down an intermittent IF gain problem which turned out to be in the coils of the first 50 MHz IF transformer. This differs from the second 50 MHz IF transformer in that it is a a wider band tuning but only the narrow band second stage transformer was available and that worked just fine. I used a modern Marconi digital signal generator to align the set as I did not have much luck using the higher harmonics of my old AVO sig gen.

 

I also owned at one time an EP17R VHFand an EP20 HF Panadapter and used the EP17R to align my 770U and this work is featured in Gerry’s Detectors and Discriminators article. Also owned a very early 888 but sold that when I got the EA12. My other hobbies are E-Type Jaguars of which I have two so sticking with the “E”

Some additional photographs”   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thanks for the story Mike. Good luck with the S640, but you might need a bigger bench

Chris G0EYO

EUG Admin

 

David Griffiths in Harrow has a very nice looking 840C For Sale. David says it is in very good condition for its age and working as it should. It is too heavy to post securely so it must be collected from his  address in Harrow. He is  asking £140. If you are interested contact David via e mail davidg1950@hotmail.com 

 

 

 

 

 

 

 

 

 

 

 

 

Saw this picture on Facebook this morning and it had the caption ” Even Santa collects vintage radios”. Merry Xmas and a Happy New Year to all our readers

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Steve in Stroud, Glos is looking for an I.F. transformer for his S750 radio. The one he needs is marked as 3^rd I.F. on the circuit diagram and has the part number D1535 stamped on the base plate, it’s the final 85KHZ variable bandwidth one, ( see attached picture). The secondary winding is O/C and Steve has checked the connections from the terminations of the coil to the connecting wire links and no break is visible so the failure is deep within the coil itself unfortunately. If you can help Steve contact him via e mail SteveJawor60@outlook.com