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栽怩弌傍利 卦指云慕朕村 紗秘慕禰 厘議慕尺 厘議慕禰 TXT畠云和墮 〆辺茄欺厘議箝誓匂〇

the dawn of amateur radio in the u[1].k.(辺咄字鴨侘議貴伏)-及10何蛍

酔楯荷恬: 梓囚徒貧圭�鮗� ○ 賜 ★ 辛酔堀貧和鍬匈 梓囚徒貧議 Enter 囚辛指欺云慕朕村匈 梓囚徒貧圭�鮗� ● 辛指欺云匈競何! 泌惚云慕短嗤堋響頼���誅卒亮茂�俊彭堋響��辛聞喘貧圭 "辺茄欺厘議箝誓匂" 孔嬬 才 "紗秘慕禰" 孔嬬��



modest      receiver    picked    up   the   satellite  beacon     loud   and    clear。  The 

American got so excited he asked me if he could use my telephone to call 

the University in the U。S。A。 He told them the satellite had been heard at 

last in Athens�察�and by an amateur no less。 Later I received a letter from 

NASA thanking me for the assistance I had given。 When the American left 

he gave me that 50 MHz converter you can see there on the shelf。; 

       Norman�此 �Tell me about your contribution to the transequatorial tests 

of 1979。; 

       SV1AB�此   �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。 He had replied that the two 

frequencies behaved in a very different manner�察�but there was no harm in 

trying。   He   got   ZS6PW   and   ZS6DN   interested   in   the   idea�察  �particularly 

ZS6DN who had much better aerials and a very good QTH。 He was the 

one who stood the better chance of being heard in Greece。 We arranged a 

schedule of transmitting and listening every evening。 First they transmitted 

and   we   listened�察  �and   then   we   transmitted   and   they   listened�察  �and   contact 

was maintained on ten metres。; 

       Norman�此 �You said `every evening' do you mean that the Sun has 

something to do with this type of propagation�拭─�

       George�此      �Most     certainly。     All   the    contacts     that   were     made 

subsequently       were    at   least  one    hour   after   the   relevant    part   of  the 

ionosphere was in darkness。; 

       George      then   described      how    the   first   signals   were     heard    via 

transequatorial propagation。 

       George�此 �First we heard the beacon on 144。160 MHz set up by Ray 

Cracknell   ZE2JV  in   Southern   Rhodesia   ��now   Zimbabwe��。 The  date   was 

April    12th   1978    at  18。00    G。M。T。    Ten   months     later  I  heard   ZS6DN's 

automatic beacon with a colossal signal�察�but he was not at home� �I went to 

20 metres and put out a frantic CQ for any station in South Africa but got 

no reply。 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 



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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。 But in a few minutes I heard him calling me slowly on CW and 

we exchanged reports at 17。20 G。M。T on February 16th 1979。 This was a 

new world record for the longest distance on 2 metres 

       ;Three    days   earlier�察 �however�察    �when    I  was   not   at  home�察   �Costas 

SV1DH had established the first TEP contact between Greece and South 

Africa when he contacted ZS6DN。 As you know�察�my location is a mere 10 

kilometres   north   of   SV1DH's。   I   have   a   tape   recording   of   my   QSO   with 

ZS6DN       as  well   as  with   ZS6PW      whose     signals   came    through    a  few 

minutes later at 17。34 G。M。T。 on that historic evening。��The local time in 

Athens was 7。34 p。m。��。Of course the distance record was broken again on 

September   17th   1981   when   I   contacted   ZS4BU   who   is   110   kilometres 

further south than ZS6DN。; 

       Norman�此 �Were all these contacts only on the key�拭─�

       George�此 �Yes�察�all the contacts were on CW。 On several occasions we 

tried SSB but there was so much distortion that not a single word could be 

identified。 TEP has a lot of flutter and fading and as you can hear on the 

tapes even the morse comes through like a breathing noise�察�not a clear tone。 

This    applies   to  contacts    between     Greece    and   South    Africa。   Contacts 

between   Japan   and   Australia   where   the   distances   involved   are   smaller�察�

have been made on SSB。; 

       Norman�此 �What about cycle 22�拭─�

       George�此 �see how things go。 If anything is achieved it should be in 

1990 or later。 With modern equipment we shall be able to hear signals that 

were buried in the noise in 1979。; 

     4。 Dr Spyros Tsaltas SV1AT & George Delikaris SV1AM。 ��Mobile��。 

       The   first  two   licensed   amateurs     to  make   contact    on  2  metres    in 

Greece   were   Dr   Spyros   Tsaltas   SV1AT   and   George   Delikaris   SV1AM。 

They     had   put  together    the  famous    Heathkit    `TWOER'。       Crystals   were 

plentiful on the surplus market�察�but it was not easy to find two of the same 

frequency。 SV1AT transmitted on 144。720 and SV1AM on 145。135 MHz。 

The first contact took place at 13。30 local time on the 21st of December 



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              The dawn of amateur radio in the U。K。 and Greece �此�a personal view 



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。    He   suggested    to  the  Committee      that   the  Club 

should   apply  for  a   temporary  licence   to   be   granted   to   SV1AM   enabling 

him to transmit from his vehicle while in motion。 The licensing authority 

gave   the   licence   ;for   experimental   purposes   only�察  �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�察   �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。�� 



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       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�此�K1WHS�察�SM4GVF�察�W5UN and KB8RQ。 

       In 1982   Costas   had   been   trying for three  years�察 �without   success�察 �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;�察�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�察�which they never did。 This happens for one instant only�察�when 

the Moon is at 180 degrees azimuth�察�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�察  �naturally   with   a   delay  of   one   or   two   seconds 

because of the enormous distance involved  770��000 kilometres�察�385��000 

there and 385��000 back。 

       Costas continued�此 �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
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