E45.REV

PUBLIC ADDRESS SYSTEM

NOTE: FINAL DATE: JUNE, 1988.

NOTE: REVIEW SPEC. WITH EQUIPMENT MFG.

Part 1 -	GENERAL

1)	WORK INCLUDED

A.	Work in this Section includes the providing of labor, materials, equipment and services necessary for a complete and safe installation in accordance with the contract documents and all applicable codes and authorities having jurisdiction for ----- wired system of microphones, amplifiers, speakers and control rack

B.	Inputs shall include microphones, tape, tuner and turntable.

NOTE: CHECK IF REQUIRED.

1.	Inputs shall also include tone signals.

NOTE: CHECK IF REQUIRED.

2.	Inputs shall also include program signals, air raid signals, intercom, external music source and auxiliaries

C.	Outputs shall include speakers, tape, monitor and program to auxiliaries

2)	RELATED WORK AND REQUIREMENTS

A.	Requirements of GENERAL CONDITIONS, DIVISION No. 1 and Section GENERAL PROVISIONS FOR ELECTRICAL WORK apply to all work in this Section

NOTE: EDIT TO SUIT PROJECT REQUIREMENTS. INCLUDE ONLY SECTIONS DIRECTLY AFFECTING WORK OF THIS SECTION

B.	Related work in the following Sections:

1.	RACEWAYS.

2.	WIRE AND CABLE.

3.	GROUNDING SYSTEM.

4.	DEVICES.

5.	-----.

3)	REFERENCE STANDARDS

A.	Published Specifications' standards, tests or recommended methods of trade, industry or governmental organizations apply to work in this Section

B.	Comply with all applicable national, state and local codes and refer to Section GENERAL PROVISIONS FOR ELECTRICAL WORK for additional Reference Standards

4)	QUALITY ASSURANCE

A.	Refer to Section GENERAL PROVISIONS FOR ELECTRICAL WORK for Guarantee and other Quality Assurance requirements

5)	SUBMITTALS

A.	Submit shop drawings including catalog cuts, list of components, equipment dimensions, wiring details and component specifications

Part 2 -	PRODUCTS

1)	BASE BID MANUFACTURERS

A.	Altec Lansing, Dukane and RCA.

2)	CONTROL RACK

A.	Provide freestanding, heavy gauge steel, modular design control rack with required sections for equipment noted and of a color, finish and nameplates as directed

NOTE: INDICATE QUANTITIES.

1.	Provide ----- control amplifiers, required power supplies, speaker switching panel, terminal strips and required accessories

B.	Power amplifiers:

NOTE: INDICATE NO. OF AMPL.

1.	Provide ----- per channel and ----- watts.

2.	Gain shall be ----- db.

3.	Frequency response shall be 20 to 20,000 hertz, plus or minus 1 db at rated output

4.	Total harmonic distortion shall be less than 3 percent of rated output

5.	The amplifiers shall be similar to -----.

C.	Preamplifiers:

1.	Provide ----- per channel and ----- watts.

2.	Gain shall be ----- db.

3.	Frequency response shall be 20 to 20,000 hertz, plus or minus 1 db at rated output

4.	Total harmonic distortion shall be less than 3 percent of rated output

5.	The preamplifiers shall be similar to -----.

NOTE: CHECK IF REQUIRED.

D.	Line amplifiers:

1.	Provide ----- per channel and ----- watts.

2.	Gain shall be ----- db.

3.	Frequency response shall be 20 to 20,000 hertz, plus or minus 1 db at rated output

4.	Total harmonic distortion shall be less than 3 percent of rated output

5.	The line amplifiers shall be similar to -----.

NOTE: CHECK IF REQUIRED.

E.	Compressor amplifiers:

1.	Gain shall be ----- db from 15,000 ohm source.

2.	Compression shall be ----- db.

3.	Frequency response shall be 30 to 15,000 hertz plus or minus 1.5 db

4.	Controls shall be input, gain, AC power.

5.	Provide db compression meter.

6.	The compressor amplifiers shall be similar to -----.

NOTE: CHECK IF REQUIRED.

F.	Mixer amplifier:

1.	Gain shall be ----- db maximum for low impedance input.

2.	Frequency response shall be 30 to 15,000 hertz plus or minus 1 db

3.	Control switches shall include 5 mixer (4 low impedance and 1 high impedance), 1 master, 1 base and 1 treble

4.	Provide with VU meter, equalizers and illuminators.

5.	The automatic turntable shall be similar to -----.

G.	Automatic turntable:

1.	Provide 12 in. diameter, dynamically balanced automatic turntable with speeds: 33.33 rpm, 45 rpm and 78 rpm

2.	Rumble shall be minus 55 db minimum.

3.	The automatic turntable shall be similar to Garrard.

H.	AM-FM tuner:

1.	Provide solid state AM-FM tuner with FM sensitivity of 4 microvolts for 30 db quieting

2.	AM sensitivity shall be 3 microvolts.

3.	Frequency response shall be 40 to 15,000 hertz plus or minus 3 db

4.	Control switches:

a.	Provide AM and FM local-distant, squelch off-on, AFC off-on, input selector and AC power

5.	The AM-FM tuner shall be similar to -----.

I.	Tape recorder and reproducer:

1.	Provide single channel, 2 track with transistorized recording preamplifier

2.	Tape speeds shall be 3-3/4 ips and per sec 7-1/2 ips.

3.	Frequency response shall be 40 to 15,000 hertz plus or minus 3 db at 7-1/2 ips or 50 to 10,000 hertz plus or minus 3 db at 3-3/4 ips

4.	Signal to noise ratio shall be minimum -46 db.

5.	The tape recorder and reproducer shall be similar to -----

J.	Speaker switching panel:

1.	Provide ----- speaker circuits (----- active, ----- spare), similar to -----

K.	Monitor panel:

1.	Provide 8 inch speaker with volume control, similar to -----

NOTE: LIST SPEC COMPONENTS.

L.	Provide intercom as follows:

NOTE: LIST SPEC COMPONENTS.

M.	Provide program signaling as follows:

3)	LOUDSPEAKERS

NOTE: GENERAL DISTRIBUTION TYPE.

A.	Provide type -----:

1.	The speaker shall be 7 inch diameter with plastic dust cover with integral volume control where indicated, similar to -----

NOTE: FOR USE IN AUDITORIUM, ETC. CHECK MFG.

B.	Provide type -----:

1.	The speaker shall be:

DIA

5

(A)	inch diameter.

5

(B)	inch diameter.

DIA

a.	Continuous power rating shall be 90 watts.

b.	Frequency response shall be 40 to 13,000 hertz.

c.	Provide with matching transformers.

d.	Dispersion angle shall be ----- degrees.

2.	Provide surface mounted, column type enclosure; submit for review

3.	Type shall be similar to -----.

4)	REMOTE SPEAKER VOLUME CONTROLS

A.	Provide step attenuator type and mount on stainless steel device plate

B.	The controls shall be similar to -----.

5)	MICROPHONES

NOTE: GENERAL USE.

A.	Provide type -----.

1.	Provide omnidirectional, moving coil, dynamic type, with frequency response of 40 to 15,000 hertz

2.	Pick-up pattern shall be omnidirectional.

NOTE: INDICATE QUANTITY.

3.	Provide -----.

4.	The microphones shall be similar to -----.

B.	Provide with 25 ft. of extension cable and connectors.

6)	MICROPHONE RECEPTACLES

A.	The microphone receptacles shall be capable of receiving Cannon type XL-3-12 and Amphenol Type 91-853 microphone connectors interchangeably

B.	Provide floor mounted type in waterproof flush floor boxes.

7)	MICROPHONE STANDS

NOTE: INDICATE NUMBER AND MANUFACTURER

A.	----- floor type shall be similar to -----.

B.	----- desk type shall be similar to -----.

8)	ANTENNA

A.	Provide corrosion protected antenna with required accessories, capable of receiving all local stations, similar to -----

NOTE: CHECK EQUIP. MFG.

9)	WIRING

A.	Speaker shall be 3 conductor, No. 20, shielded with tinned copper braid

B.	Microphone shall be twisted pair, No. 22 conductors, shielded with overall tinned copper braid or fill and overall PVC jacket

C.	Antenna shall be 300 ohm, shielded with foil and PVC jacket.

Part 3 -	EXECUTION

1)	INSTALLATION

A.	The installation shall be in accordance with standard broadcast practice

B.	Joints and connections shall be made with resin core solder or mechanical connectors

C.	Terminal connectors and cables shall minimize crosstalk, hum or noise pick-up

D.	Terminate ends of shields with wedge-on collars or plastic tape

E.	Provide ground cable shields, chassis and rack to raceway system

F.	Provide separate raceways for audio input, audio output, power, telephone and signal

G.	Minimum separation between audio input and power raceways shall be 12 inches

H.	Insulate input cable shields from conduit and from each other

I.	Run microphone lines in continuous lengths between receptacle and input equipment without splices or connections

2)	TESTS

A.	Adjust, balance and tune equipment for optimum performance.

B.	Demonstration test in the presence of Owner's representative

C.	Establish, tabulate and submit normal settings for all level controls

D.	Instruct operating personnel in the proper use of entire system including all input and output equipment and circuits

E.	Make any required adjustment and modifications indicated by the test at no additional cost for input and output equipment and circuits