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256A680 REV. A 495 Printed In U.S.A.


The 100-watt output of the basic Model PA300 was designed to drive a single high power speaker. However, the essential difference between models is that the PA300*012-NY can drive one or two 11-ohm impedance, high or low power speakers. When two speakers are used they must be connected in parallel. B. MANUAL CHANGES.
Control Cable Wiring Diagram.

The following changes should be made to the Model PA300 Installation and Service Instructions (Part No. 255A198). 1. Page 2. Change the following paragraphs, as shown below: Frequency Range 800 to 1800Hz

and may be installed in any convenient location; on the roof, fender, behind the grill, etc. Any special mounting instructions applicable to the type of speaker you have selected will be found in the speaker carton. Using 18 gauge wire, connect the speaker leads (58W speakers to SPEAKER LO POWER and 100W speakers to SPEAKER HI POWER) as shown in the Control Cable Wiring Diagram (new). 3. read: E. Page 7, Paragraph 4-3.E. HI-LO. Change to

Operating Current (14.0Vdc-WAIL) 1 Low Power Speaker 2 Low Power Speakers 1 High Power Speaker 2 High Power Speakers Voltage Output (approx.) 1 Low Power Speaker 2 Low Power Speakers 1 High Power Speaker 2 High Power Speakers 2. read: A.

5 amperes 10 amperes 10 amperes 15 amperes


45Vp-p 40Vp-p 64Vp-p 60Vp-p

This function is not available on the Model PA300*012-NY. 4. Page 7, Paragraph 4-4. HORN/SIREN SWITCH. Change to read: The HORN/SIREN switch, located on the left side of the front panel, activates the peak-and-hold sound (down) in any position except radio. The air horn function is not available on the Model PA300*012NY. 5. Page 8, Paragraph 4-6. PRESS AND HOLD FUNCTIONS. Change to read: PRESS AND HOLD FUNCTIONS Selector Switch Position Manual

Page 4, paragraph 3-3.A. Speaker. Change to


The unit is designed to operate with one 11ohm impedance speaker or two 11-ohm impedance low power (58W) or high power (100W) speakers, connected in parallel and in phase. On FEDERAL speakers, this can be accomplished by connecting the two speaker leads marked "1" to the SPEAKER COMMON control cable lead and the two speaker leads marked "2" to the SPEAKER HI POWER or SPEAKER LO POWER control cable leads See the Control Cable Wiring Diagram (new). A speaker is not included as part of the electronic siren. FEDERAL speakers are weatherproof

Press on Horn Ring Produces Peak-andHold

Release of Horn Ring Produces Coast down and silence

6. Page 14. Refer to the component location diagram detail in this supplement to locate the additional PA300*012-NY components (R59, R60). 7. Page 15. A Model PA300*012-NY schematic diagram is included in this supplement sheet. 8. Page 16. Change the parts list as follows:

a. Add:R59, 60- Resistor, 0.47 ohm, 2W, 10%. Part No. 130A130. b. Change the Part No. of T2 to 120C165A04. c. Change the Part No. of the Circuit Board (with parts installed) to 200C860-02.
Component Location Detail.


-3Model PA300*012-NY Schematic Diagram.