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Model 370-202 Interface Amplifier
Assembly for Electro-Sound
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.
Introduction
The Model 370-202 Interface Amplifier for Electro-Sound allows GAI-Tronics' Page/Party
interface with GAI-Tronics' Electro-Sound systems. This unit interconnects two voice circuits that are
dissimilar in voltage and/or impedance. The interface amplifier is not just a matching transformer; it also
includes a gain adjustment that compensates for differences in signal levels or permits use with a range of
signal level. It can also be used in other paging systems.
Installation
WARNING
Do not install the Model 370-202 equipment in hazardous areas; such installation may cause a safety
hazard and consequent injury or property damage.
Enclosure Placement
The Model 370-202 Interface Amplifier Assembly should be located near the Model 10456-001
Electro-Sound power source and within 300 feet of the Model 305-001 Line Balance Assembly for the
®
GAI-Tronics Page/Party
GAI-TRONICS 3030 KUTZTOWN RD. READING, PA 19605 USA
610-777-1374
V
ISIT WWW
G A I - T R O N I C S ®
A H U B B E L L C O M P A N Y
Model
Consisting of:
No.
Amplifier
370-202
371-202
system.
800-492-1212
.
-
.
GAI
TRONICS
COM FOR PRODUCT LITERATURE AND MANUALS
Enclosure
372A
Fax: 610-796-5954
Pub. 42004-374A
®
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Summary of Contents for GAI-Tronics 370-202
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Page 1: Confidentiality Notice
372A Installation WARNING Do not install the Model 370-202 equipment in hazardous areas; such installation may cause a safety hazard and consequent injury or property damage. Enclosure Placement The Model 370-202 Interface Amplifier Assembly should be located near the Model 10456-001 Electro-Sound power source and within 300 feet of the Model 305-001 Line Balance Assembly for the ®... - Page 2 Connect the conduit to the enclosure, then feed the wiring through the conduit into the enclosure. When wiring the station, follow the wire colors carefully; the colors noted in Figure 2 correspond to GAI-Tronics 60038 Series cable. The wires should be spade-lugged and connected properly to the terminal block. An improper termination may result in diminished station performance.
- Page 3 Electro-Sound installation manual, 42004-072. It is absolutely necessary to place a 33-ohm load between points four and five or between points six and seven on the power source enclosure terminal blocks if these points are not connected to a page or party system. The two-way amplifier in the Model 370-202 may ®...
- Page 4 Pub. 42004-374A Model 370-202 Interface Amplifier Assembly for Electro-Sound Page: 4 of 9 ® Figure 2. Page/Party to Electro-Sound \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-374a.doc 07/05...
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Page 5: Checkout And Adjustment
Model 370-202 Interface Amplifier Assembly for Electro-Sound Page: 5 of 9 Checkout and Adjustment 1. After the Model 370-202 is installed and connected to the power, verify that normal use of the ® Page/Party system has not been affected by the addition of the Model 370-202 Interface Amplifier Assembly. - Page 6 2. For the GTC system page line to Electro-Sound system or central amplifier, cut Jumper W-3. When the Model 370-202 is operated in a one-way mode, the BALANCE control will have no effect on operation. When W-4 is cut, only the LINE TO GTC control will be functional. The GTC TO LINE potentiometer will be active if W-3 is cut.
- Page 7 Pub. 42004-374A Model 370-202 Interface Amplifier Assembly for Electro-Sound Page: 7 of 9 Figure 3. \\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-374a.doc 07/05...
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Page 8: Special Applications
Model 370-202 Interface Amplifier Assembly for Electro-Sound Page: 8 of 9 Special Applications Please contact your GAI-Tronics’ Representative for more detailed information on the capabilities and special applications of the 370 Series. The 370 Series can also be used with the following: •... -
Page 9: Specifications
, nom.; 0.39 V minimum Frequency response.................... 250-4000 Hz (0, -0.5 dB) Harmonic distortion ......................0.6% maximum GAI-Tronics Line Terminals Output: Line Terminals Input; 1000 Hz Load impedance......................33 ohms, nominal Output source impedance..................1000 ohms, minimum Output level.................... 1.5 V , nom. -
Page 10: Warranty
Warranty Equipment. GAI-Tronics warrants for a period of one (1) year from the date of shipment, that any GAI-Tronics equipment supplied hereunder shall be free of defects in material and workmanship, shall comply with the then-current product specifications and product literature, and if applicable, shall be fit for the purpose specified in the agreed-upon quotation or proposal document.
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