Rockwell Collins High Frequency Antenna Systems

Last updated: 8 July 2010



Rockwell-Collins perhaps made (or sold) some of the finest HF Antennas possible. They approached the customer's HF system design with both the best hardware and also the best antenna to meet the project's link objectives.

When we were investigating the purchase of our 637P series antenna, we decided to document the other antennas that Collins sold to their users. If you know of any other antennas sold or made by Collins for HF use, please advise us.

237A Series non Planar Log Periodic Antenna (6.5 to 60 MHz)

	LPA Non Planar
	Different View

Information to be added

237B-1(2, 3) Rotatable Log Periodic Antenna

	Basic View
	6.5 to 40 MHz
	25 KW average
	50 KW Peak
	15 db Average Front to Back Ratio
	14 db Average gain
	More information to be added

237C Non Planar Log Periodic Antenna - Fixed Direction

	Basic View
	237C-2	4 - 40 MHz
	237C-3	6.5 - 40 MHz

237F-1 Billboard Antenna

	Basic Photo
	Information to be added

237N series Log Periodic monopole Antenna (fixed direction)

	Photo
	Photo 2 (Multiple Arrays)
	Information to be added

237Q-1 Hardened Vertical Antenna (used with the Minute Man Missile Silos) - 110 Ft tall

	Information to be added

237Q-2A Hardened Vertical Antenna (used with the Minute Man Missile Silos) - unknown height

	Information to be added

237Q-5 Hardened Vertical Antenna (used with the Minute Man Missile Silos) - 28 Ft tall

	Information to be added

437C Series Broad Band Vertical Monopole Antenna (3 variations)

	437C-1A 2-20 MHz		108 Feet tall
	437C-2A 2.5-25 MHz		 88 Feet tall
	437C-3A 3-30 MHz		 68 Feet tall
	Rated for 50 KW (average or peak)
	Photo

437G-2A Bidirectional Horizontal Polarized Antenna (2.5 to 30 MHz)

	Photo
	Information to be added

437Y-1A Log Periodic Antenna and Broad Band Vertical Cage Antenna

	Photo
	Information to be added

637B-1 Transportable Log Periodic Antenna

	Information to be added

637C-3 Transportable Broad Band Vertical Polarized Antenna

	Photo
	Information to be added

637D-1A Transportable Log Periodic Antenna

	Information to be added
637E-1 Fixed Log Periodic Antenna

	Photo
	Information to be added (it does use three towers)

637K-1 Manpack Vertical Antenna (used with the AN/PRC-47)

	Information to be added

637P-1/1A Transportable (fixed direction) Log Periodic Antenna

The 637P-1A  is a directional HF Antenna for tactical or fixed station use.  
It can be operated from 2-30 MHZ with a gain of 7.5 to 12 DB between 4-30 MHz 
and below 4 MHz, it has an unidirectional pattern.
The antenna is rated to accept power levels of 10 KW PEP or average.
Model OE-85 is rated for 3 KW and OE-86 is rated for 10 KW.
The only difference between the two models is the RF Connector on the balun.

The average VSWR is 2:1 and the Front to Back ratio is 7.5 db to 12 db 
depending on several factors.

It is 75' High (on a 80 foot mast) and requires a plot of land that is 310 feet by 200 Feet  
It is designed to be stowed in a frame 57" x 35.5 " x 92" and can transported by truck or air.
It weighs 1270 lbs.

Installattion
=============

A 80" portable tower is erected and guyed at three levels.  

The curtain array is attached to the top of the tower and is stretched 
forward 100 feet to the ground while a counter wire goes the opposite 
direction to the ground out 100 feet.  The extention to the front has a 
wire array going out in either side to out posts that are 300 feet 
apart forming a huge triangle back to the top of the tower.

See this	drawing
		Photo 1

It will take a five man crew about 1 hours to install and test the 
antenna on a typical flat field. (We assume they are well trained!)

Images of it in the storage system:
	basic pack frame
	Two 637's in storage (1)
	Two 637's in storage (2)

637X-1 Orthogonal antenna - part of the AN/TSC-60(V) series shelter systems

        Information to be added (there has also been one on eBay!)

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To offer us additional help on this site, please contact us by sending us a mail at tsc-60@cellmail.com!