Transatlantic Communication

“In a change to our publicised talk on Antenna Building by Justin G0KSC – Mark M0IEO gave us one the RSGB’s downloadable talks entitled “A Dip into the Archives” .

This Dip into the Archives talk covered the first Transatlantic Transmission from Europe to America and Back. An achievement first made by Leon Deloy, 8AB, President of the Radio Club de la Cote D’Azur, Nice.

“Deloy was determined to cross the Atlantic with his signals and he cabled Schnell in the US that he would transmit on 100 metres between 0200 and 0300GMT on 26 November 1923. But Schnell wasn’t ready to transmit as he needed permission from the Supervisor of Radio at Boston – he wasn’t quite a comfortable about operating without permission that Deloy was! Deloy was heard in the US on two consecutive nights, by which time the Americans had the necessary permission to operate. On 27 November, for an hour Deloy called and then sent two messages. At 0330GMT he signed off asking for an acknowledgement. Long calls followed from 1MO and 1XAM and then came the eagerly awaited confirmation that Deloy had been heard. The Atlantic has been spanned both ways!

Deloy used a Hartley circuit with variable series condensers in both the aerial and counterpoise leads. Two French SIF 250W valves were used in parallel as oscillators with high voltage 25 cycle AC applied to their plates. Those who heard his signals in the US spoke about ‘25 cycle gurgle’ on his transmission.

The first British amateur to make two way contact with the USA was Jack Partridge, 2KF, on 8 December 1923 when he contacted A1MO, operated by Ken Warner. Partridge’s transmitter used a Mullard 0-150 valve and the HT was obtained from a 1500 volt Mullard generator driven by a half horsepower DC motor. The receivers used at both ends were almost identical, one detector and one low frequency stage. A1MO was using 400 watts input and 2KF said his aerial current was only 1.8 amps compared with Warner’s 2.5 amps. In a letter describing his historic contact, Partridge wrote, “At 0545GMT on December 8, A1MO first received 2KF and gave me the OK signal, wishing me good morning.

“He then opened up by saying, “Some more amateur radio history in the making – this is the first two-way working with Great Britain. Here Warner of QST. QRA?”

“Contact was maintained until 0827GMT when I heard Warner say “Going now OM. Very QRZ. This is the end of a wonderful night. Goodbye.””

Copied from A Dip into the Archives – Transatlantic

After the customary tea and cakes Holly M6HSJ asked if could address the members of the club.

Holly is a Staff Nurse on the Stroke Unit at Southend Hospital and she informed us that it was Stroke Awareness Month she would like to remind everyone of the signs and symptoms of a stroke, because the sooner you can get a stroke treated the better the outcome for the patient. She went through the normal signs that are advertised on the TV but pointed out that some symptoms are not always obvious. At this point she spoke about Brian M6TGC who had recently suffered a stroke, his symptoms weren’t as obvious as the normal ones. Brian was more than happy to share the “patients view” of a stroke and his wife Sue also gave her story from a relative’s view point. Bejoy M6KFB said that from a doctors point of view they referred to a stroke as a Brain Attack as this stressed the importance of the incident and the fact that you need to get to hospital as soon as possible.

During Holly’s talk she and Brian answered questions from the members.

We would like to thank Mark M0IEO and Holly M6HJC for two very informative talks.

It was also decided that all the money from this evenings Tea/Coffee collection would be donated to the Nepal Earthquake Disaster Fund. Accordingly a cheque for £60.00 has been sent to the Disaster Fund – this incudes a donation from Mrs Rita Leggett (Graham’s Mum). We would like to thank Mrs Leggett for her kind donation.

 

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