PROPOSAL FOR ANTENNA AND PEDESTAL ASSEMBLY

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03330A004100070008-7
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 4
• Document Creation Date: December 22, 2016
• Document Release Date: February 8, 2012
• Sequence Number: 8
• Publication Date: February 28, 1958
• Content Type: MEMO

Declassified in Part - Sanitized Copy Approved for Release 2012/02/08: CIA-RDP78-0333OA004100070008-7
C
28 February 1958
DOC -~- BEY GATE a9 MA4d
s~c~~^ BY
BRIG COMP 41~ G21 ==_y TYPE 921
CLASS Pt0:2 IM CLASS C_
JUST MgXT MV -210/0 QJTW: HO 10.2
Subject:
Proposal for Antenna and Pedestal Assembly.
Enclosure: (1) Three copies,
Gentlemen:
detailed cost breakdown.
In accordance with your request, we are submitting herewith our proposal
for the design and fabrication of quantity (1) antenna and pedestal.
Our proposal, on a cost plus fixed-fee basis, assuming that this work will
be incorporated by a Work Order or Change Order to RD-128, is $29.750.08.
including fixed fee.
Our proposal is submitted in accordance with the following specifications and
technical requirements which were agreed upon by and Government 25X1
technical personnel.
Frequency Range: 150-1000 megacycles to be covered in 3 bands
with 3 interchangeable feeds.
VSWR: No greater than 3 to 1 over the 'specified frequency range.
Pattern: The half-power beamwidthe of the main lobe ranging from
approximately 60 degrees at 150 me to approximately 8 degrees at
1000 me in both azimuth and elevation planes. The side lobes shall
be at least 6 db down from the peak of the main lobe and the front-
to-back ratio shall be greater than 10 db.
Polarization: Selectable, by orientation of feed. either vertical,
horizontal or 45 degrees.
COPY NO. J
Declassified in Part - Sanitized Copy Approved for Release 2012/02/08: CIA-RDP78-0333OA004100070008-7
 Declassified in Part - Sanitized Copy Approved for Release 2012/02/08 : CIA-RDP78-0333OA004100070008-7
CON Fil DENTAL
28 February 1958
R. F. Transmission Line: Low lose, 50 ohm coaxial cable not
more than 50 feet in length.
Site and'Weight: Maximum size shall be less than 12 feet high
by 8 feet wide by 5 feet deep and the weight shall be lees than
1200 pounds.
Pedestal: The antenna shall be mounted on a motor driven pedestal
cape obl of rotating the antenna continuously in azimuth, both clock-
wise and counterclockwise, at a speed of 2 revolutions per minute.
The pedestal shall incorporate a rotary joint in the R. F. transmission
line and a Synchro generator for providing bearing information to a
remote indicator. Primary power for the operation of the drive motor
will be specified by the U. S. Government at the time the contract is
let.' It will be selected from one of the following: 110 volt, 60 cycle,
single phase; 220 volt, 60 cycle, 3 phase; 220 volt D. C.
Remote Control and Indication: Provision shall be made for controlling
the pedestal drive motor and for indicating the azimuth bearing of the
antenna with an accuracy of + 1 degree, at a remote position not more
than 50 feet from the antenna.
Assembly and Disassembly: Antenna shall be, capable of being broken
down into 3 major sub-assemblies - reflector, reflector mounting
structure and pedestal - with provisions to facilitate assembly and dis-
assembly of these items. Provision is to be made to allow quick inter-
change of feed assemblies.
Environment: The antenna assembly shall be capable of operation (at
dgraded performance) in a wind of up to approximately 60 miles per
hour and severe icing conditions up to 1 inch in thickness. The stated
maximum wind velocity is a rough estimate, and more precise values
will be furnished as the work progresses. Above the maximum wind
velocity the reflector should be removed to prevent mechanical damage
to rotating mechanisms, motors,, etc.
Test Data: E -plane and H-plane patterns, gain plots and VSWR plots
at 3 frequencies (lower, center and upper) in each of the 3 bands
required.
cON H DENT
A
Declassified in Part - Sanitized Copy Approved for Release 2012/02/08: CIA-RDP78-0333OA004100070008-7
 Declassified in Part - Sanitized Copy Approved for Release 2012/02/08 : CIA-RDP78-03330A004100070008-7
CON
DENT
AL
28 February 1958
The proposed design approach is to provide an 8 foot diameter paraboloidal
reflector with 3 sleeve dipole feed assemblies each operating over a slightly
less than 2 to I frequency band. (150-280 mc. 280-550 mc. 550-1000 mc).
Provision for rapid interchange and orientation of the dipoles will be made.
The pedestal will incorporate a reversible drive motor, a gear train, a con-
tacting type coaxial rotary joint and a Synchro generator for providing bearing
information. Type HO- 7/8 inch Heliax Cable (Andrew Corporation) is proposed
for the transmission line. The maximum attenuation of this cable at the
frequencies involved is less than 2 db per 100 feet. The remote control and
indicator box will incorporate an on-off reversing switch for the drive motor.
a Synchro follower with pointer and dial indicator calibrated in degrees for
bearing information. Interconnecting cables from remote box to antenna,
50 feet in length, will be provided. Size and weight will be well within the
specified limitations. All components will be protected against corrosion and
weather normally encountered with shipborne equipment. Type N fittings
will be provided.
In accordance with your request, every attempt will be made for the delivery
of this equipment in approximately ninety (90) days from receipt of contractual
authorization.
In view of the very short desired delivery, we are considering the above
technical requirements as target specifications. This is especially true for
the front-to-back ratio at the lowest frequencies.
Our proposal contained herein is considered firm for a period of ninety (90)
days from the date of this letter.
It is assumed that all other terms and conditions which are presently applicable
to RD-128 and Work Orders thereunder would remain unchanged as heretofore
amended.
appreciates the opportunity of submitting this proposal. and if we may 25X1
be of further assistance or additional data is required, it will be furnished
upon request.
Very truly yours.
DMK: glf
Director, Contract Administration Dept.
NTIAL
Declassified in Part - Sanitized Copy Approved for Release 2012/02/08: CIA-RDP78-03330A004100070008-7
 Declassified in Part - Sanitized Copy Approved for Release 2012/02/08: CIA-RDP78-0333OA004100070008-7
Declassified in Part - Sanitized Copy Approved for Release 2012/02/08: CIA-RDP78-0333OA004100070008-7