CHAPTER 13. ANTENNA, TRANSPORTABLE

TM 11-5820-554-12

CHAPTER 13

ANTENNA, TRANSPORTABLE

Section I. INTRODUCTION

communications at frequencies up to 10 MHz.

Operation at higher frequencies provides

13-1. Description

bidirectional azimuthal coverage for ranges of

The Transportable antenna (Collins 637T-2) is an

approximately 300 to 1,000 miles. The phosphor-

adjustable dipole antenna designed for use with

bronze wire rope radiating elements of the Collins

portable, tactical, and amateur radio systems. It can

637T-2 are extremely durable and do not reflect

also be used effectively as a backup antenna for

sunlight. The elements can be set to resonate length

vehicular and shelter-mounted communication

by observing the dials built into the housing. A

systems.

It is capable of operating on

ferrite balun in the antenna housing transforms the

communication circuits extending to 1,000 miles.

balanced dipole circuit to 60 ohms unbalanced. The

The Collins 637T-2 is operational in the 3.4- to 30-

antenna can be deployed by one man in 5 to 20

MHz range. At dipole heights of 15 to 40 feet, the

minutes.

Collins 637T2 provides short range skywave

Figure 13-1. Transportable antenna (Collins 637T-2).

13-1