licence "for experimental purposes only, and for a
period not exceeding one month".

And so it was that the first 'mobile' QSO took place on 2 metres
between licensed Greek amateurs on the 27th of January 1965 at 19.25
local time. SV1AM was travelling in his car and SV1AT was at his home
QTH.

5. Costas Tzezairlidis SV4CG. (SSTV).

In 1970 Costas Tzezairlidis SV4CG built a unique electro
mechanical machine using two motors to achieve horizontal and vertical
scanning. He had found a motor which rotated at 960 R.P.M. which
corresponds to 16 revolutions per second, the exact speed required for
the horizontal scanning. The speed of the second motor was 1
revolution per second. The reciprocal motion was produced by a cam
through an 8:1 reduction gear. A weight attached to the microscope
pulled it back to start the next line. The microscope was focussed
sharply on the drum carrying the picture to be transmitted. Resolution
was excellent.

The 'microscope' consisted of a cardboard tube with a 13 cm focal
length lens at one end and a Philips OAP12 photo-diode at the other
with another lens in front of it. This primitive microscope produced
a picture of reasonable quality.

For reception SV4CG made a converter using the long persistence P7
c.r.t. With this set-up Costas had his first SSTV contact on 40
metres with SV1AB on February 28th 1971. After that he had many
contacts on 7 and 14 MHz as can be seen from the extract from his log.
(The special commemorative prefix of SZ0 was used by all SV stations
during 1971).

6. Costas Georgiou SV1OE. (E.M.E.)

Up to the end of 1988 the only Greek amateur who had positively
authenticated Moonbounce contacts was Costas Georgiou SV1OE. His very
first contact was made in 1982 when he contacted VE7BQH in Canada on 2
metres. In the ensuing four years Costas managed to work four more
stations: K1WHS, SM4GVF, W5UN and KB8RQ.

In 1982 Costas had been trying for three years, without success, to
hear his own signal via Moonbounce. The reason for his failure was
that he was unaware of a very basic fact.

"I was completely ignorant of the Doppler shift 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 m