Pub. 42004-165E
GAI-TRONICS 3030 KUTZTOWN RD. READING, PA 19605 USA
610-777-1374
800-492-1212
Fax: 610-796-5954 V
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Model 305-001 Line Balance Assembly
Confidentiality Notice
This manual is provided solely as an operational, installation, and maintenance guide and contains
sensitive business and technical information that is confidential and proprietary to GAI-Tronics. GAI-
Tronics retains all intellectual property and other rights in or to the information contained herein, and
such information may only be used in connection with the operation of your GAI-Tronics’ product or
system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any
third party.
General Information
The GAI-Tronics Model 305-001 Line Balance Assembly has been designed to properly load both page
and party line circuits of a GAI-Tronics communication system. At least one line balance assembly must
be installed in each system. The Model 305-001 Line Balance Assembly can be used in single or multiple
(up to five) party line systems.
Installation
Location
There are three primary considerations in determining the location of the line balance assembly:
1. It should be near the electrical center of the system;
2. It should be adjacent to an indoor station in a relatively quiet area;
3. It should be no more than 5,280 feet (1600 m) from the most distant station, when used with standard
GAI-Tronics cable.
For larger systems or when non-standard cable is to be used, please contact a GAI-Tronics representative
for further information. The line balance assembly has one electrical adjustment that must be made while
using a station. See the “Line Balance Assembly Adjustment” section.
Mounting
Mounting can be accomplished by either suspending the line balance assembly by a one-inch conduit
nipple (not supplied) from the lower side of an indoor wall station, or by using the mounting ears located
on the box.
Wiring
Use one twisted pair for the page circuit and one similar pair for each party line to connect the terminal
blocks of the line balance assembly and the associated indoor wall station.
