Northern Airborne Technology PA700 - Manual (Page 5)

PA700 Series High Power Voice Amplifier
SM44 Installation and Operation Manual
Section 1 Rev: 1.00 Issue 4 Page 1-1
ENG-FORM: 800-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 1 Description
1.1 Introduction
Information in this section consists of product description, design features and specifications for the
PA700 Series High Power Voice Amplifier. All derivative product information shall be contained in the
applicable manual supplement, which may be obtained from NAT as required.
Review all notes, warnings and cautions.
1.2 Product Description
The completely transistorized PA700 Series provides the basis for a portable, high gain, compact, tactical
sound system. It is designed to provide point-to-point dissemination of sound in application use over land,
water or from the air. The maximum useable range is greater than one mile when operated from a
favorable vantage point. The maximum rated audio power output is 700 watts with 28 Vdc input power.
Note: In airborne applications, the amplifier is normally remote-mounted in the avionics bay and the
PA700 Series controls are not operator accessible. Any necessary adjustments must be made at
the time of installation.
1.3 Design Features
The PA700 Series amplifier is a 700 watt completely transistorized unit constructed in a rugged, black
anodized, aluminum chassis. Its reliability is enhanced by conservative design and a unique built-in
protective circuit, which shuts off the amplifier whenever excessive input or operating conditions threaten
to impair vital circuit elements.
The PA700 Series contains protective circuits, which operate to protect the semiconductor components
from the following conditions:
a) Reverse polarity
b) Excessive current or voltage
c) Internal or external short circuits
When the problem is transient or cleared, the protective circuit resets by the simple operation of the
power switch.