The Dawn of Amateur Radio in the U.K. and Greece Part 5

"I was completely ignorant of the Doppler s.h.i.+ft effect," Costas told me. "The frequency of received signals varies according to the position of the moon. If it is to the East of your own location the signals return 500 to 1,000 Hz below the original transmitted frequency. For years I had been sending long dashes slowly and waiting to hear my signals return on the same spot, which they never did.

This happens for one instant only, when the Moon is at 180 degrees azimuth, exactly due south. When it moves to the west of south the returning frequency is correspondingly higher. Using a 50Hz audio filter (which is essential for Moonbounce) it is very easy to miss the weak signals. Soon after I found out my ridiculous mistake I began to hear my signals, naturally with a delay of one or two seconds because of the enormous distance involved--770,000 kilometres, 385,000 there and 385,000 back.

Costas continued: "My next problem was finding the moon. I had no computer at the time and no Keplerian elements. I mounted a small video camera in the centre of four 16-element Yagi antennas and rotated the elevation and azimuth motors until I could see the moon in the centre of the monitor in the shack. Of course when the sky was overcast I was out of business. Much later when I obtained a little Sinclair ZX80 computer life became easier.

"When I made my first contact I was simultaneously in QSO with SV1AB and SV1IO on 1,296 MHz who could hear what was going on. I remember SV1AB got very excited and began shouting 'I can hear him, I can hear him!' The QSO was with VE7BQH. Later Lionel sent me a very valuable present, valuable not for its cost but for the fact that it was something quite un.o.btainable in Greece at that time--a very low-noise preamplifier for 2 metres.

"After the successful launch of Oscar 10 those amateurs who had complex antenna systems and low-noise receivers they had used for Moonbounce congregated on 145.950 and spoke to each other on QRP which prevented ordinary mortals from hearing them. By QRP I mean outputs of half a watt or less. But when finally one day I broke into a net QSO I arranged schedules for Moonbounce with two stations in Sweden.

I had a successful contact with one of them but never heard the other.

The reason may have been a very simple one: the polarisation of signals returning from the Moon varies from one moment to the other, so if you have been transmitting with horizontal polarisation and go over to reception it is very easy to miss the answer of the other station if the polarisation has changed."

SV1OE then explained the very strict procedure which must be adhered to for Moonbounce schedules.

"Schedules are arranged to last one hour. The first station to start transmitting on the hour must be the one whose QTH lies to the east of the other. The calling frequency for Moonbounce is 144.011 MHz., and the duration of the call is 2 minutes, but for the first minute and a half you call CQ DE SV1OE and during the last half minute you also give the call of the station you are trying to contact, for instance G3FNJ DE SV1OE. You must on no account transmit for more than two minutes because at the beginning of the third minute the other station will begin transmitting the same pattern of signals. But if he has heard you he will alter the pattern. For the first half minute he will send SV1OE DE G3FNJ and for the ensuing minute and a half he will transmit the letter O which signifies that he has heard your callsign completely and without difficulty i.e. Q5 in the Q Code.

If I have also heard your callsign completely I will send G3FNJ for half a minute followed by RO for a minute and a half, which means that I have also received your callsign and your O. And you will reply RO 73 which concludes the successful contact.

"There are one or two other letters that can be used. Sending M signifies that I hear you well but can only copy 50% of your transmission, equivalent to Q3. And the letter T signifies I hear you but cannot read you at all--Q1.

"It has been found by experience that the best sending speed is 8 w.p.m. Sending slowly or very fast presents problems at the other end."

CHAPTER EIGHT

PERSONAL REMINISCENCES AND ANECDOTES

The eight items which follow are not strictly part of the story of the development of amateur radio, but they deal with some historical events which are connected with our hobby. Two are of particular interest: the account given to me by Takis Coumbias formerly SV1AAA of the early days of amateur radio in Russia and the story of the Greek broadcasts from Cairo, Egypt during the German/Italian occupation of Greece in World War II.

Nearly all the photographs of the period were taken by the author.

1. Athanasios 'Takis' Coumbias (1909-1987)

When I met Takis in his office in May 1983 I told him I was thinking of writing a small book about the history of amateur radio in Greece before it was too late--so many of the old timers had already pa.s.sed away. Little did we both suspect at the time that he also would not live to see the finished project. I asked him how far back he could remember.

"Well, I can start from 1924 when I was about 15 and living in Odessa in the Soviet Union. There was a lot of interest in wireless and two magazines were published in Russia which dealt mainly with the construction of receivers. My interest was first aroused when a friend of mine at school proudly showed me something he had just made.

It was, he told me, a variable capacitor and he was going to use it to make a radio receiver. The contraption was enormous by today's standards and must have weighed about half a kilo. My friend said it had a capacity of 250 micro-micro farads, which meant absolutely nothing to me at the time.

"When he completed his receiver I became very interested and decided I would build one too. But materials were hard to find and very expensive. Two items one had to buy: valves and headphones.

"I asked my friend where he had found the sheet metal to make the plates of the capacitor. He took me to a row of small shops which had a metal-faced ledge below the shop window. The metal was thin and seemed easy enough to remove. We sat on the ledge for a while and when the coast was clear we tore away a section and ran like mad.

Later I ruined a pair of my mother's dressmaking scissors cutting out the plates. I used rings of some thick copper wire to s.p.a.ce the plates but I could not drill holes in the plates for the spindle so a friend did that for me. I used about 15 plates and to this day I have no idea what the capacity of the finished capacitor was. Some small items for the receiver could be found in a little shop owned by an old man who charged exorbitant prices, so I decided I must go to Moscow for the valve and a single headphone that I needed.

"But Moscow was three days and two nights away by train, and it was the middle of winter. So what, you may ask. Like many others I had to travel on the roof of a goods waggon. I took with me a loaf of bread, a piece of cheese and two hard-boiled eggs. My father said I must be mad but he gave me some spending money and his blessing.

"I had eaten my food by the end of the second day so when we stopped at Brensk which is famous for its 'piroushki' I decided to try them. They were kept warm in large metal tins ready for the arrival of the train. There were seven varieties and I had one made with liver and a savoury sauce.

"When I arrived in Moscow I went to see the Greek amba.s.sador as I was carrying a letter of introduction from my father who was acting Consul for Greece in Odessa, but it was Sat.u.r.day and the amba.s.sador's office was closed. I learned later that only foreign establishments closed at the week-end. So I went to look for a cheap hotel. Looking out of the bedroom window I saw a lot of people running in one direction. At that moment a woman brought me a towel and a small bar of soap, so I asked her what was going on outside. She said the butcher near the hotel had just received some liver. Would she buy me some I said. I gave her some money and she returned nearly two hours later with the liver wrapped in newspaper. When I opened it I saw it was horse liver cooked with corn and it had an awful sour smell. I just could not face it, although I was starving by now."

I asked Takis about the shops in Moscow. He said he had found several shops with parts and some made-up receivers in the State owned shops. He learned later that these receivers were made by amateurs because the factories only made equipment for the armed forces. He bought a triode valve called 'MICRO' and was told it had an amplification factor of 7. He wrapped it carefully in cotton wool for the return journey to Odessa. He also bought a dry battery pack which gave 80 volts, and an enormous single headphone for one ear which was ex-army surplus.

When he returned home and began to build his receiver he raided his mother's kitchen to build things like terminals, switches etc.

There was an electric bell circuit between the dining room and the kitchen and as they didn't use it his mother said he could dismantle it and use the wire, which was quite long because it went up into the loft and then down again to the kitchen.

"I had acquired a small square of bakelite and I used a penknife to make a holder for the valve, twisting a few turns of wire round the pins as I could find nothing to use as a socket. I had no idea how to connect the various items I made or bought. I had seen a circuit diagram in a French magazine of a detector with reaction. I made the connections by twisting wires together and finally the receiver was complete. The next thing was the aerial. I made an enormous aerial with four parallel wires, like the aerials I had seen on s.h.i.+ps.

Putting it up was a dangerous operation as our house had a rather steep tiled roof, so I got some friends to help me. Some of them who had 'superior knowledge' told me the down-lead must have no bends. I got hold of a stiff copper wire and supported the down-lead on two enormous bell insulators as used on telegraph poles. I had to smash a corner of my bedroom window to bring the wire in. I had bought a large knife switch which could be turned over to connect the aerial to ground. I was afraid the large flat top of the aerial would attract thunderbolts. When I finally connected the aerial to the receiver I heard ABSOLUTELY NOTHING."

I asked him how he tuned the receiver. He said he had put many taps on the coil and he twisted his antenna to these taps trying various combinations with the tuning capacitor.

"All I heard was this breathing noise. I learned later that it was the 'carrier wave' of a broadcasting station without modulation, but I didn't know what that meant. As my friends also heard the same noise I was convinced my receiver was working. We soon found out that the long wave transmitter at Ankara, the capital of Turkey was making test transmissions without modulation. Ankara was one of the first broadcasting stations in that part of the world."

Norman: "Regeneration should have produced a whistle."

Takis: "Yes, indeed. And in a peculiar way. When I approached the receiver my hand produced the whistle."

Norman: "Hand capacity effect."

Takis: "And foot capacity effect as well! When I approached my knee to the metal leg of the work-bench I would lose the station I had been listening to." He said the tuning capacitor he had made was obviously too small and he had to alter the taps on the coil continuously. About three o'clock in the morning during a cold winter night he heard a new sound--the breathing (carrier) noise and a sort of regular ticking. He later found out that it was the new broadcasting station in Vienna, Austria, which transmitted the sound of a metronome throughout the night. This would have been about 1926.

I asked Takis about school. "In spite of the late nights listening I never missed a day at school. My father was the Chairman of the School Committee and I couldn't let him down. But I had to earn some pocket money to pay for the bits a pieces I needed. Particularly a decent pair of headphones; I had to hold the army headphone to me ear with one hand which gave me pins and needles. For some years I had kept goldfish and pigeons, so I sold them. A friend of mine had gone to sea as a cadet and his s.h.i.+p went abroad, so I asked him to get me a pair of headphones.

"I must explain to you that it was no easy matter for a Russian seaman to serve on a vessel which visited foreign ports. First one had to go through the Communist Party sieve and then he was told that if he jumped s.h.i.+p his family would suffer for it.

"Anyway, he bought me a lovely pair of Telefunken headphones when the s.h.i.+p berthed at Constantinople (Istanbul) which I have to this day. But not on his first trip, when he was not allowed to go ash.o.r.e.

And it was not the captain who decided who could go ash.o.r.e. A trusted member of the Party would pick out a group of seamen who could land but they had to stay together the whole time.

"I never managed to go abroad. At the Club I had obtained a morse test certificate for 40 letters a minute (8 wpm) in Latin characters and 90 letters (18 wpm) in the Cyrillic alphabet (Russian). To go abroad one had to up-grade to 80 Latin and 120 Cyrillic letters. (16 & 24 wpm). I was put on a small coastal ice-breaker which cleared the river estuaries in the Black Sea.

"The Black Sea is one of the most treacherous inland seas in the world. During the winter its northern sh.o.r.es are frozen whereas the coast of Asia Minor keeps the southern sh.o.r.es relatively warm by comparison. This results in gale force winds and rough seas. Waves follow each other very closely as opposed to the long swell one gets in the Pacific. s.h.i.+ps have to leave port to avoid cras.h.i.+ng into each other.

"I was about 18 when I first went to sea as a cadet W/T operator.

One day when we came out of an estuary the sea was so rough that the captain decided to turn back. As we turned to starboard we noticed an American freighter behind us heavily laden with wheat and very low down in the water. To our horror it was caught between the crests of two enormous waves and broke in two roughly amids.h.i.+ps. Although we were only about half a mile away the freighter sank before we could get to it. We saw a few survivors in the water, but it would have been impossible to put a boat into that treacherous sea. Apart from which a man cannot survive many minutes in a water temperature just above freezing. It was all over in a flash and we returned to Odessa in deep shock.

"Odessa used to have four harbours. The callsign of the W/T station was EU5KAO. I remember it very well because it was my job to take the weather forecasts for s.h.i.+pping which it transmitted regularly."

Takis spoke about some amusing misconceptions of that period.

When he first completed his receiver and was getting poor results with it he asked a more experienced amateur to look at it. The 'expert'

immediately found the first fault: the downlead from the antenna had a bend in it of more than 45 degrees which was quite unacceptable.

Secondly, the ground connection to the central heating radiator was no good because it was winter and the radiator was hot so it presented a very high resistance! It must be soldered, he said, to a cold water tap.

"I tried everything I could think of to solder the wire to the tap, but to no avail. Then one day I had a brain-wave and I made a stupendous invention! I wrapped a copper strip round the tap and bolted it tightly, together with the ground wire. I was really very proud of myself and wondered if anybody else had ever thought of doing it that way."

I asked Takis if he had done any transmitting from home. "We amateurs of foreign origin were not allowed to own transmitters but we could operate the club station under close supervision by the Party member who was always present. My own SWL callsign was RK-1136 as you can see from the QSL card I received from EU5DN in 1929.

"I remember our excitement when we first contacted a station outside Russia. It was a station in Saarbrueken and we were on a wavelength of 42 metres. All the members of the Club sent him our SWL reports and he sent us back his cards and a photograph of his equipment which was published in the Moscow amateur journal and so Odessa became famous. On 42 metres most of our QSOs were with German stations. As a result of this success many young lads joined our club and we 'experts' would explain to them about bends in the aerial down-lead and the high resistance of a ground connection to a central heating radiator when the water in it was hot!!

The club transmitter consisted of 4 valves in a Hartley parallel push-pull oscillator circuit which we considered to be of relative 'high power'--perhaps all of 10 watts."

Takis continued: "In 1930, my family, like many other families of Greek origin, moved to Athens. I built a cw transmitter using four Philips valves. I went and saw Mr Eleftheriou at the Ministry and he informed me that there was no way that he could issue me with a transmitting licence, but he thanked me all the same for telling him I had built a transmitter."