Eddystone User Group


Author Archive

Wanted Eddystone 830/7 receiver

April 30, 2024 By: chris Category: Wanted

Kevin KB0KJH in Central Virginia, USA is  looking for an Eddystone 830/7 receiver. If you can help please contact him direct via e mail:  Kevin Shoemaker <shoemakerlabs@gmail.com>

 

Obituary: Peter Lankshear, Early Eddystone User Group member in New Zealand

April 26, 2024 By: chris Category: News

It was with great sadness that I learnt of the passing of Peter Lankshear, an early member of the Eddystone User Group, of New Plymouth,  New Zealand, on the 31st of March 2024 at the age of 95. Peter was the much loved husband of the late Iris and will be greatly missed by his three children, seven grandchildren and eight great grandchildren, plus his many friends from the world of vintage radio.

Peter was a life member of both the New Zealand Vintage Radio Society (NZVRS) and the Historical Radio Society of Australia (HRSA). He wrote numerous articles for a number of publications, including the NZVRS “Bulletin”, the HRSA “Radio Waves”, the American “Old Timer’s Bulletin”, the British “Radio Bygones” and the Eddystone User Group’s Newsletter “Lighthouse”.

Peter wrote about his early life in EUG Newsletter No 37 pp 22 & 23 (available here).  He commenced work with the New Zealand Broadcasting Service as a technician and in 1950 was transferred to the Quartz Hill Receiving Station high on the hills above Cook Straits which separates New Zealand’s North and South Islands. Being midway between the Equator and Antarctica it was ideal for world-wide radio reception. The station was installed during WW2 as a vital news and information source and post war developed into an international monitoring service providing reception reports on transmissions received from Asia and North America. A principal function was monitoring the BBC General Overseas and Pacific Service. It was at Quartz Hill that Peter first encountered Eddystone receivers in the form of a pair of S680X receivers which were installed as Search receivers.  Peter was impressed with the build quality of the Eddystone receivers compared to the American and Canadian sets they already had and vowed to own one. He did eventually but it took him 35 years to acquire one.  Peter spent most of his working life with the NZBC and his hobby was collecting and restoring vintage radio sets.

Peter was a prolific contributor to the NZVRS “Bulletin” and their website lists nearly 100 articles he wrote on vintage radio equipment including the Eddystone 940 and the 870A between 1988 and 1996.  Peter built up a huge collection of vintage radio’s over the years but he disposed of this to other collectors before his death and Daniel Hockey,  ZL4VR, became the owner of his four Eddystone receivers (S640, S750, S680/2 and S940). Apparently Peter was keen that his beloved radios went to someone who would not only keep them in use but was also a younger radio enthusiast. Daniel is 36 years old and has been interested in vintage radios and test equipment since he was a child. It was Daniel who was kind enough to notify me of Peter’s passing so I think Peter’s sets are in safe hands.

Peter and Graeme Wormald G3GGL (SK), the previous EUG Newsletter Editor and Administrator often corresponded on Eddystone matters, and Graeme wrote about Peter’s love for the Eddystone marque. RIP Peter and thank you.

Chris Pettitt G0EYO – EUG Administrator

Peter with his collection

Eddystone EC10 for Sale

April 26, 2024 By: chris Category: For Sale

Paul Kalas G3VCN in Portsmouth has an Eddystone EC10 for sale @ £50 plus postage at cost or collect from home QTH. If you are interested contact Paul on  paulg3vcn@gmail.com

 

 

 

 

KW160 Transmitter wanted to go with Eddystone Receiver

April 19, 2024 By: chris Category: Wanted

Alan Cavender G4FNM in Stocksfield, Northumberland wants a KW160 ‘one-sixty’ transmitter to go with his Eddystone 730/4 receiver. If you can help Alan then please contact him at – alcav@yahoo.com

 

 

 

Eddystone 730/1A For Sale

April 08, 2024 By: chris Category: For Sale

Clive Walker M1MST, near Ludlow has an Eddystone 730/1A for sale. Clive says he has had this a long time and it is working (PLEASE NOTE THE SPEAKER IS NOT INCLUDED IN THE SALE). The mains is wired directly in to the rear of the radio. Internally the radio looks OK and still has the original trimmer and spare fuses.

It will be collection only from SY8 4ND near Ludlow. No post on this one. Clive is looking for £150 for this receiver. If you are interested then contact Clive direct on e mail  clive.walker5@btopenworld.com 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Donation of Spare parts

April 08, 2024 By: chris Category: News

Sian and Roger Digby contacted me about some radio parts that belonged to Roger’s grandfather who passed away some 60 years ago and who was a keen radio enthusiast and had been the owner of an Eddystone Receiver which Roger remembers his grandfather using to listen to overseas shortwave broadcasts when he was a boy. Roger kept the set (he can’t recall the model number) for some 40 years after his grandfather’s death and finally passed it on to another radio enthusiast who had helped his son with a motorbike problem. Roger’s wife Sian had found a box of radio parts belonging to the grandfather when sorting through some cupboards in their garage. They passed them on to me in the hope that they might find a new home with someone in the Eddystone User Group. Here is a list:

  1. MullardValve 6J7G boxed looks new
  2. Ken-Rad Valve 6R7G used
  3. Marconi Valve DL63 used (rattles!)
  4. Pix Invisible aerial in box (30ft) (picture frame aerial?)
  5. Old 3 3 round pin mains plug (crabtree)
  6. Graham Farish Aerial Unit (variable resistor or cap?)
  7. Belling and Lee Anti interference unit (transformer?)
  8. 6BA6 miniature valve used
  9. Belling and Lee Aerial block (wall mounted?)
  10. Plus couple of unidentifiable bits.

If you see anything of interest then contact Chris G0EYO EUG Admin on g0eyo@blueyonder.co.uk. 

Wanted: Eddystone Multi Wave Switched Coil Unit

March 01, 2024 By: chris Category: Wanted

Simon M5POO in Corbridge, Northumberland is looking for a Multi Wave Switched Coil Unit originally made around 1935, for a little project he is working on. The one he is specifically after is the Cat. No. 961 option with 260/600 metres as the lowest frequency option. If anyone have one, either used or unused that they would be happy to part with please drop Simon a line at simon(at)m5poo(dot)co(dot)uk.

 

 

 

My Eddystone EC 10 Transistor Communication Receiver January 1970 – to ???

February 24, 2024 By: chris Category: News

Interesting anecdote from EUGer Roger Tricket about his lifetimes experience with his much loved Eddystone EC10 receiver

In 1969 I was posted to a position in New Guinea, so took delivery in Melbourne early Jan 1970 of a new Eddystone EC 10 Serial 6605. It has been to New Guinea, Indonesia, Saudi Arabia, England, Thailand and a number of locations in my home country, Australia. 

EC10 above ICom 8500

It has been turned on continuously since new apart from periods in transit, so now in 2024 it seems it would have been on for all of about 50 years of its 54 year life (2024).

Still used every day for a shortwave broadcast I like  and as in all those years when not listening, I turned down the audio, but leave the set running.  It has generally been fed from 20 – 30 ft aerials, sometimes thru a mini aerial tuner. Now wire aerial through 1 to 1 toroid transformer into coax to the set. (note the station closed about 2020). Now in general use but always on tuned to WWV.

WWV freq on dial

 

Alterations – replaced all electrolytic capacitors about 2015; the agc line cap now uses a bipolar cap as there was a question relating to the circuit polarity, it works better now.   When adjusting the mixer trimmer with metal shaft screwdriver, it  shorted and killed the mixer transistor, which has been replaced from a stock of replacements I keep ( these have the leads wound together in attempt to avoid the dreaded whiskers ).

 

 

Rear view with power and antenna connections

The power supply is a 9v plug pack and fed to an 8v voltage stabiliser built into the case about 2016. However for some 30 years it was fed with voltages from various sources 6v to 12v and even a standard mini 9v battery, on which it will run for several hours. Note: set runs positive to earth so cannot use common power supply with other equipment – the plug pack has negative to earth so reversal is done in the voltage stabiliser which uses feed in from an isolated input plug; see pic.

The aerial terminal was replaced with a coax fitting ( for 50 Ohm line ) which feeds an internally mounted mini toroid balun – 50 to 75 Ohms so the twin diodes are removed. The BFO injection Capacitor was increased to 3PF. As a signal strength meter I use a 100 Microamp meter direct into the audio out socket as this carries the AGC voltage in the original wiring from the factory.

Original box and instructions

Compared to a modern Icom R8500 receiver it does a very credible job, though frequency drifts notoriously with daily temperature changes!

It is now 2024 and I am in my mid 80s so with luck it will outlast its owner………

 Compared to a modern Icom R8500 receiver it does a very credible job, though frequency drifts notoriously with daily temperature changes! It is now 2024 and I am in my mid 80s so with luck it will outlast its owner……

Interesting note of relevance – Nasa used these same germanium transistors in early space exploration and it has been found “whiskers” grow in the RF metal case transistors and kill them. There is a document available where Nasa explores this subject.  Hence this set needs to run continuously which seems to avoid the problem.

Note – In 2021 the on off power switch in the RF gain control failed and there is now a mini switch on the rear.

Roger Trickett

Eddystone EA12 HF Amateur Radio Bands Receiver For Sale

February 03, 2024 By: chris Category: For Sale

Hugh Thomas in Somerton, Somerset has an Eddystone EA12 receiver for sale which he purchased at the RAE exhibition in Leicester in the early 1970s when he was a student and it has been a reliable friend since then.

Hugh describes the condition as generally good but regrettably the S meter was already cracked when he bought it (common problem). The functionality of the EA12 is good and Hugh is unaware of any defects. The radio is sold “as seen” and heard. EA12 sets in good condition are much sort after and can attract high prices. Hugh is looking for a fair offer for this receiver and will offer a reduction for an organisation that encourages the young to engage with Amateur Radio and who will appreciate the hands on, engineering of this classic period of radio construction (1960s) built by Eddystone. The receiver is heavy and requires considerate handling so collection in person by the buyer is necessary from TA11 6NZ which is near Somerton in Somerset. Please email Hugh on hugh@thethomas.net using the subject as above.

S640 Identity Crisis

January 15, 2024 By: chris Category: News

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