[QuadList] One Inch A Format Recovery

Wed May 21 14:49:51 CDT 2014

olympic coverage may have been my harold rosen's  child at hushes  called 
syncom 3 that  was  geo stat.
my dad was on that  one  during those  early hughes  space  efforts.

synom I was a real bummer  though.....  it  blew up when  they tried to 
punch it to geostat. orbit....
ed sharpe archvist  for smec

Syncom  3
NSSDC/COSPAR  ID: 1964-047A 

Description
Syncom 3 was the first geostationary  satellite. (The earlier 
geosynchronous Syncom 2 had an orbit inclined to the  equator.) It was an experimental 
geosynchronous communications satellite placed  over the equator at 180 
degrees longitude in the Pacific Ocean. The satellite  provided live television 
coverage of the 1964 Olympic games in Tokyo, Japan and  conducted various 
communications tests. Operations were turned over to the  Department of Defense 
on 1 January 1965, Syncom 3 was to prove useful in the  DoD's Vietnam 
communications. 
Mission  Profile
Syncom 3 was launched from Cape Kennedy on  19 August 1964 and injected 
into an elliptical orbit inclined 16 degrees to the  equator following a third 
stage yaw maneuver. The apogee motor was fired to  remove most of the 
remaining inclination and to provide a circular  near-synchronous orbit of 35,670 
km x 35,908 km. The spacecraft next carried out  a series of attitude and 
velocity maneuvers to align itself with the equator at  an inclination of 0.1 
degrees and to slow its speed so it drifted west to the  planned location at 
180 degrees longitude where its speed at altitude was  synchronized with 
the Earth. These maneuvers were completed by 23 September, and  Syncom 3 was 
used in a variety of communications tests, including the  transmission of the 
Olympics, transmissions between the Philippines, USNS  Kingsport, and Camp 
Roberts, California, and teletype transmissions to an  aircraft on the San 
Francisco-Honolulu route. Satellite operations were turned  over to the 
Department of Defense on 1 January 1965 and it was operated by the  DoD through 
1966. It was turned off in April 1969. 
Spacecraft  and Subsystems
The Syncom satellites were 71 cm diameter,  39 cm high cylinders. The fully 
fueled mass of the spacecraft was 68 kg. The  nozzle of the solid 
propellant apogee motor (1000-lb-thrust designed to impart a  velocity increase of 
1431 meters/sec) extended from the bottom of the cylinder  and a co-axial 
slotted array communications antenna from the top. The total  height including 
the nozzle was 64 cm. The radial exterior was covered with 3840  P-on-n 
silicon solar cells which provided direct power of 29 watts the 99  percent of 
the time the spacecraft was in sunlight. Nickle-cadmium rechargeable  
batteries provided power when the spacecraft was in the Earth's shadow. No  active 
thermal control was required. Most of the central interior of the  spacecraft 
consisted of the tanks and combustion chamber for the apogee motor,  around 
this were arranged two hydrogen peroxide and two nitrogen tanks and the  
electronics. Attitude and velocity control was provided by nitrogen jets to  
align the spin axis and hydrogen peroxide jets to position the satellite. 
Each  system had two jets, one parallel and one perpendicular to the spin axis. 
Syncom employed a redundant,  frequency-translation, active repeater 
communication system designed to handle  one two-way telephone or 16 one-way 
teletype channels. The dual transponders  utilized 2-watt traveling wave tubes. 
Selection of receiver and transmitter was  made by ground command. One 
receiver had a 13 megacycle bandwidth for TV  transmission, the other a 5 
megacycle bandwidth. The receiving gain was 2 dB  through the slotted dipole 
antenna. Signals were received on two frequencies  near 7360 megacycles and 
retransmitted on 1815 megacycles. The slotted dipole  transmitting antenna radiated 
a pancake-shaped beam 25 degrees wide with its  plane perpendicular to the 
spacecraft spin axis. There were also four whip  antennas oriented normal to 
the spin axis for telemetry and  command.

In a message dated 5/21/2014 9:35:05 A.M. US Mountain Standard Time,  
mike at bolandcom.com writes:

Ah yes, the Conrac AV12e and AV82e with UHF too... 
I used an AV12 to record ABC TV Olympics coverage 
off-air for Australian ABC TV using a pair of HBC TR- 
22s, in the evenings in Mt View, California, to then rush  
the NTSC reels to SFO to 747 them to Sydney for  
(presumably, conversion to PAL) broadcast down under.   
Although I understand there was some coverage of the  
1964 Tokyo games distributed via satellite, my memory  
is that good international global geo-stationary satellite  
services were not practically in place until almost the  
80s.  
The AV12E schematic looked a great deal like it was  
lifted from an RCA television.  Good for internally  
distributing the news of the other stations in your town 
to your newsroom.  It was Clean, but had no special  
circuits.  So, of course, for the official Station Demods  
[FCC], was were where the Tek 1450s ruled the roost.

-mb
______________________________________________________________

On  Wed, 21 May 2014 11:26:57 -0400 (EDT), COURYHOUSE at aol.com wrote:

____________________________________

message got  though  fine  David!

Ah yes the  Conrac  tuner... we have one  with   TUBES in it also!

The  picture is pretty  good  for  going though all  that !

Back to the  Conrac tuner... were these  used in stations  as  'monitoring 
devices'  or  to pick up  signals for  retransmission  or? 

many thanks   Ed #

In a message dated 5/21/2014 5:32:21 A.M. Mountain Standard Time,  
david at dcvideo.com writes:

Let's see if the quad list will post this email.

Ed,

Here is an OTA recording made in 1974 from a  University in Texas. The 
record machine was a VR-7800 in high-band. The  receiving antenna was about 40 
miles from the transmitter. Off air  reception was not the best via a Conrac 
vacuum tube tuner. The TV  station was running RCA TK-44A's.

Regards, 

David Crosthwait
DC Video
Videotape transfers and  more!

_david at dcvideo.com_ (mailto:david at dcvideo.com) 
www.dcvideo.com

Follow DC Video  on Facebook: https://www.facebook.com/dcvideo
Follow DC Video on  YouTube:  http://www.youtube.com/user/dcvideoonline

=

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