This specification covers the following components of Public Address Sets AN-UIQ-1( ) and AN-UIQ-3( ), which are high powered, transportable, public address equipments used to address large groups of men dispersed over wide areas or under adverse conditions; for example: To address, dispatch, control and direct personnel and equipment on airfields or during beach landing operations.

Components

Amplifier AM-76( )/UIQ-1

Loudspeaker LS-111( )/UIQ-1

Loudspeaker LS-120( )/UIQ-3

Amplifier AM-76( )/UIQ-1 is a high-grain amplifier with a rated output of 17 watts with not more than 10 percent distortion at 1000 cycles per second. It operates from 115 volts, 60 c.p.s., single phase a.c. Two or more amplifiers may be connected in parallel to obtain higher output power.

Loudspeaker LS-111( )/UIQ-1 is a 300 watt, multi-unit, blast resistant loudspeaker in a cast housing. It includes twelve driver units, driven from two impedance-matching transformers, operating into a mixing chamber and a common built-in horn.

Loudspeaker LS-120( )/UIQ-3 is a 150 watt, multi-unit, blast resistant loudspeaker in a cast housing. It includes six driver units driven from one impedance-matching transformer which operates into a mixing chamber and a common external horn.