TM 55-1930-209-14&P-12
1.0 Description
The Automatic Power, Inc. FA232/FA390A produces an omnidirectional sound signal to meet the provisions of 33 CFR
67 for a one half mile sound signal.
The frequency of 390 3 HZ is determined by a highly reliable feedback oscillator mounted inside the dome cover of the
signal, and coupled to the emitter driver.
A solid state program timer forms an integral part of the oscillator module. The timer PCB module mounts above and
connects directly to the oscillator. See drawing below.
FIRST
TIMER
OSCILLATOR
Form No. 6310 0238
