Hubbell GAI-Tronics 751-001

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Pub. 42004-210A

GAI-Tronics Corporation P.O. Box 1060, Reading, PA 19607-1060 USA

610-777-1374 n 800-492-1212 n Fax: 610-775-6540

VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS

GAI-TRONICS® CORPORATION

A HUBBELL COMPANY

Model 751-001

Speaker Amplifier

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 Model 751-001 Speaker Amplifier is an important

component of the 700 Series Page/Party

system. It

mates directly with the 701 and 751 Series Enclosures

and broadcasts page announcements over the

Page/Party

system speakers.

The Model 751-001 is constructed of 16-gauge cold-

rolled steel and is suitable for either indoor or outdoor

use.

Installation

CAUTION

Do not install this equipment

in hazardous areas or areas other than those on the

equipment approval list in the Specifications section.

Such installation may cause a safety hazard and

consequent injury or property damage.

To install, plug the Model 751-001 Speaker Amplifier into the appropriate enclosure, and tighten the 4

screws in the corners of the front panel. Refer to Figure 1 for typical installation details.

Adjustment

Model 751-001 Speaker Amplifier mates with an enclosure wired directly to a speaker. The speaker

volume adjustment is located under the GAI-Tronics nameplate on the front panel. Refer to Figure 1. Use

a small flat-blade screwdriver to adjust the speaker sound volume.

Figure 1. Model 751-001 Speaker Amplifier

(shown with an indoor enclosure)

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The GAI-Tronics Model 751-001 Speaker Amplifier is a crucial component of the 700 Series Page/Party® system, designed to broadcast page announcements over the system's speakers. This device is built for durability and versatility, constructed from 16-gauge cold-rolled steel, making it suitable for both indoor and outdoor applications.

Function Description

The primary function of the Model 751-001 Speaker Amplifier is to amplify audio signals for broadcast through Page/Party® system speakers. It directly interfaces with the 701 and 751 Series Enclosures, forming an integral part of the communication network. This amplifier ensures clear and effective transmission of page announcements, which is vital for various industrial and commercial environments where reliable communication is paramount. Its robust design and specific integration with GAI-Tronics enclosures highlight its role in creating a cohesive and functional paging system.

Important Technical Specifications

The Model 751-001 Speaker Amplifier boasts a range of technical specifications that underscore its performance capabilities:

Power Input: Operates within a 90-140 V ac range, 50/60 Hz, with a nominal 120 V ac.
Power Consumed:
- Zero signal: 10.5 VA, 5.3 W
- Max. signal: 58 VA, 29.5 W
Construction/Finish: Made from 16-gauge cold-rolled steel with a gray polyurethane finish, ensuring durability and resistance to environmental factors.
Amplifier Output: Features a push-pull, Class B amplifier with a minimum output of 12 watts, provided with nominal supply voltage.
Amplifier Sensitivity: 0.5 V ac for rated output.
Frequency Response: 250-4,000 Hz, +0/-3 dB reference to 1,000 Hz. This range is optimized for clear voice transmission.
Distortion: Maximum 1% THD (Total Harmonic Distortion) at 1,000 Hz, 12 watts, indicating high audio fidelity.
Input Impedance: 50,000 ohms nominal.
Controls: Includes a speaker volume control, accessible through an access hole behind the nameplate on the front panel, allowing for easy adjustment of sound levels.
Temperature Range: Designed to operate in a wide temperature range from -22 °F to +158 °F (-30 °C to +70 °C), making it suitable for diverse environmental conditions.
Dimensions: Measures 8.1 H × 8.1 W × 3.0 D inches (206 × 206 × 76 mm).
Shipping Weight: Approximately 5.6 lbs. (2.6 kg).
Approvals:
- NRTL Listed for USA and Canada:
  - Class I, Div. 2, Groups A, B, C, D when used with listed GAI-Tronics Models 702 or 703 120 V ac series enclosures.
  - Class I, Div. 2, Groups A, B, C, D; Class II, Div. 2, Groups F and G; Class III, Div. 2, when used with listed GAI-Tronics Models 732, 758, 7325, 733, or 7335 120 V ac series enclosures.
- NRTL Listed for USA as a Fire Protective Signaling Amplifier when used as part of GAI-Tronics Model 110-001 amplified loudspeaker assembly.

Usage Features

The Model 751-001 is designed for straightforward installation and user-friendly operation:

Direct Mating: It directly mates with GAI-Tronics 701 and 751 Series Enclosures, simplifying the setup process.
Easy Installation: To install, the speaker amplifier is plugged into the appropriate enclosure, and secured by tightening four screws in the corners of the front panel. This ensures a stable and secure fit.
Volume Adjustment: A speaker volume control is conveniently located under the GAI-Tronics nameplate on the front panel. This allows for easy adjustment of the speaker sound volume using a small flat-blade screwdriver, enabling users to fine-tune audio output to suit specific environmental needs.
Versatile Application: Its robust construction and wide operating temperature range make it suitable for a variety of indoor and outdoor settings, from industrial plants to commercial buildings.

Maintenance Features

Maintenance and troubleshooting for the Model 751-001 are designed to be efficient and effective:

Troubleshooting Guide: The manual provides a concise troubleshooting table to assist technicians in diagnosing common issues.
- Feedback/Distortion: If a hum or buzz occurs during Page/Party® station operation, the solution involves inspecting the system cable for improper termination, loose connections, shorts, and grounds. Emphasis is placed on the criticality of line balance assembly connections.
- Speaker Level Adjustment: If the associated speaker level requires adjustment, technicians are directed to adjust the speaker volume control located on the amplifier front panel, behind the nameplate, using a small standard screwdriver.
Replacement Parts: A comprehensive list of replacement parts is provided, including:
- 10440-002: Maintenance Cable
- 46101-012: Screw Kit
- 12523-001: GAI-Tronics Nameplate Kit
- 12601-001: Standoffs (10 pack)
- 12604-001: Fuse, Slow-Blow 0.7A (10 pack)
- 25210-005: Gasket
- 69701-010: Speaker Amplifier PCBA This list facilitates quick identification and ordering of necessary components for repairs, minimizing downtime.
Confidentiality Notice: The manual itself is considered confidential, containing proprietary business and technical information. This ensures that sensitive details about the device's operation, installation, and maintenance are protected, emphasizing the importance of authorized personnel handling the equipment.
Warranty and Return Policy: GAI-Tronics provides a one-year warranty against defects in material and workmanship. For service, users are instructed to contact their Regional Service Center for a return authorization number, ensuring a structured process for repairs or replacements. This policy outlines the conditions for warranty claims and the procedure for returning equipment, contributing to long-term usability and support.