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Updated: June 18, 2025
With an input of around 5 watts I was able to achieve W.A.C. on 14 MHz in 25 minutes one very exciting afternoon. There were very few stations around and single frequency working had not been heard of yet.
Most people know by now that SV1DH was one of the principal stations involved in the very successful Transequatorial propagation tests which took place during the 21st sunspot cycle between 1977 and 1983. In October 1976 there was a rumour that 145 MHz signals had been heard directly between Argentina and Venezuela.
Of course, strong solar activity can virtually make over-the-horizon HF radar unusable. A Spectrum Analyser display shows all the frequencies between 5 and 28 MHz.
The first contact took place at 13.30 local time on the 21st of December 1963. A few days later SV1AT had a cross-band QSO with George Vernardakis SV1AB who was transmitting in the 20 metre band on 14.250 MHz A.M. as he had not completed his TWOER yet. At that time SV1AT was the Secretary of the Radio Amateur Association of Greece.
I returned to the cross-band frequency on 10 metres which we used regularly for 28/50 MHz QSOs and managed to contact a station in South Africa who was very far away from ZS6DN but who kindly offered to QSP a message by telephone. He was told that ZS6DN had gone out but would be back soon. I was terrified that the opening would not last long enough.
On October 9th 1988 at 23.10 GMT a new world distance record was established on the 50 MHz band by the Greek experimental station SZ2DH operated by Costas Fimerelis SV1DH and a station in Tokyo, when it was proved that the signals had travelled a distance of 30,650 over the South American continent.
The station was put into service in 1972 and has two 100KW Marconi short wave transmitters and a veritable forest of antennas covering 1,100 acres, arranged in three lines to cover the desired directions, as can be seen on the great circle map. The pylons supporting the 6 MHz arrays are truly impressive at 328 feet.
Many people believe that a modification of Tesla's 'Magnifying Transmitter' was used by the Soviet Union when suddenly one day in October 1976 they produced an amazing noise which blotted out all radio transmissions between 6 and 20 MHz.
Norman: "Tell me about your contribution to the transequatorial tests of 1979." SV1AB: "I had been in regular contact with ZS6LN on ten metres long before Costas SV1DH appeared on the scene. I remember asking ZS6LN why we should not receive South African stations on 2 metres when we could hear them so well on 50 MHz.
But George Gerardos, SV1AG, who had been closely involved, decided that it would be better to overlook certain details which may seem strange to us at the present time details which could be rectified at a later date, provided the law was finally on the Statute book. For instance, I refer to the very restricted frequencies we were allocated in the 80-metre band, 3.500 to 3.600 MHz.
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