SECTION I
GENERAL DESCRIPTION
The Model PA300 Series can drive one or two
11-ohm impedance, high power (100W) or low power
(58W) speakers. When two speakers are used, they
must be connected in parallel and in phase.
The Tap II feature allows the driver to change
the siren sound from wail to yelp (or vice-versa) via
the vehicle’s horn ring. Tap II provides especially
effective traffic clearing capability. In addition to Tap
II, additional alternate sounds can be activated in
two other selector switch positions by depressing and
holding the horn ring for as long as the alternate
sound is desired. The charts in Section IV of this
manual illustrate the operation of these features
more fully.
Other special features of the Model PA300
Series include:
•
High degree of reliability is achieved
through the use of integrated circuits
and silicon output transistors.
•
Control panel is illuminated with
LED's.
•
Newly designed printed circuit board
provides improved performance and
durability under a wide range of
environmental conditions.
PA300 Series Models:
•
690010
12V, 200W, HI-LO with
microphone
•
690009
24V, 200W, HI-LO with
microphone
-1-
Figure 1-1. Model PA300 Series Electronic Siren.
The Federal Models 690009 and 690010 (PA300
Series) (figure 1-1) are precision built, efficient and
economical, full-featured electronic sirens of ad-
vanced design. They provide wail, yelp and hi-lo siren
tones, as well as the Tap II feature, public address
(PA), radio rebroadcast and an air horn sound.
The siren should be installed in negative ground
vehicles. It is protected against failure modes (includ-
ing reversed polarity) by a fuse that is replaceable
without tools. No components protrude from the
bottom of the siren to interfere with mounting
arrangements.
A noise-cancelling microphone is wired-in to
prevent loss or theft. It provides high quality voice
reproduction without feedback “squeal”. The micro-
phone push-to-talk switch overrides any siren signal
for instant PA use. PA and radio volume are adjust-
able by means of a front panel GAIN control. Radio
inter-connect wires are built-in. No additional cables
are required.
290A4507-01
Summary of Contents for PA300 Series 690009
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