wheelock AA-10 Schematic

273 Branchport Ave.
Long Branch, N.J. 07740 Thank you for using our products.
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www.wheelockinc.com

AUDIOLINK SERIES

INSTALLATION INSTRUCTIONS

MODEL AA-10 PAGING AMPLIFIER

Use this product according to this instruction manual. Please keep this instruction manual for future reference.

GENERAL APPLICATION INFORMATION:

Wheelock's AudioLink Series Model AA-10 Paging Amplifier is output rated at 10 watts RMS.

This amplifier affords a choice of three different inputs: one low impedance microphone input, one telephone paging input, and one
high impedance auxiliary input. Three input channels allow these inputs to be used actively at one time: one microphone input, a
telephone paging input, and one auxiliary input. Note that the auxiliary input (i.e., background music, tone generator, etc) will
automatically be soft muted whenever a telephone page is generated or a microphone is used. After completion of the page, the music
will rapidly return to its original level.

A built-in limiter circuit compensates for the varying voice levels and paging styles of the people who have access to telephone
paging or a microphone. The limiter maintains rated output without distortion.

The amplifier features tamper-resistant individual input volume controls, as well as a master volume control, individual treble and
bass controls, a low-cut horn protect switch, power on indicator, and a peak level indicator.

The unit operates from 115 volts, 60Hz and has a power consumption of 35 watts. The unit has a thermal breaker in the power
transformer as well as thermal cut-off and current limiting for overload protection on the output. The thermal breaker in the
transformer is automatically resettable.

NOTE: All CAUTIONS and WARNINGS are identified by the symbol . All warnings are printed in bold capital letters.

CAUTION: In the event the transformer's thermal breaker does not reset, have the trouble investigated by an authorized service

technician or return unit to the factory.

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS UNIT TO RAIN

OR MOISTURE.

UNPACKING:

The amplifier was carefully checked before leaving the factory. Inspect shipping container and unit carefully for indication of
improper handling. If the unit has been damaged, make an immediate claim to the carrier.

MOUNTING INSTRUCTIONS:

The amplifiers are designed for either shelf or wall mounting. For surface wall mounting, use the 2 keyhole slots in the chassis cover.
Be sure to use hardware suitable for the mounting surface. Do not block air flow to top or bottom. Blocking the air flow will cause
automatic thermal shutdown.

CAUTION: These devices are not intended for use in hazardous locations as defined by the National Electrical Code (NEC) and

by the National Fire Protection Association (NFPA).

WARNING: DO NOT USE THIS UNIT IN LIFE-SAFETY APPLICATIONS. THIS UNIT IS UL 813 LISTED AND

CUL LISTED FOR COMMERCIAL AUDIO ONLY.

POWER AND GROUNDING:

The 115 VAC line cord has a three-prong plug which should be plugged into a three wire grounded electric outlet. It is very
important to maintain the amplifier ground for safe and trouble-free operation. If there is no grounded electric outlet, use a 2 prong to
3 prong plug adapter, with grounding lead, and connect the grounding lead to a metallic bond on the outlet; (i.e. the screw which
secures the outlet's wall plate).

Copyright 1995, 1998, 1999 Wheelock, Inc. All rights reserved.

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TECHNICAL SPECIFICATIONS:

# PARAMETERS AA-10 TOLERANCE COMMENTS

1 Power Output
@ 1KHz
2 Total Harmonic
Distortion

Less than 1% THD

10 Watts RMS

±1dB @ 115VAC/60Hz

±5%

+1%

Same as above
@ rated output

3 Outputs 8 OHMS, 25V, 70.7V ±1.5dB Bal. or Unbal.

INPUTS TELEPHONE MIC AUX ------ ------

4 Impedance 600 OHMS 600 OHMS 12K OHMS ------ @ 1kHz

5 Sensitivity

6 Frequency

Response
7 Signal to Noise
Ratio

8 Type of Input

-20dBM
(77.5mV -

-16 +20)

1mV

220mV

TEL ±2dB
MIC ±.5mV
AUX +20% -50%

To produce

rated output

300Hz-5kHz 50Hz-15kHz 50Hz-15kHz ±3dB Ref. 1kHz @ 1W

25kHz MAX.

65dB

Transformer

Isolated/Bal.

60dB
Balanced or
Unbalanced

70dB

Unbalanced

-4dB +10dB

------

Not Weighted

-----­ 9 Controls TEL, MIC, AUX, BASS, TREBLE, MASTER VOLUME Front Panel Mount
Lo cut switch Front Panel Mount
10 Indicators Green LED - Power ON

Red LED - Peak Level

11 Protection Transformer thermal circuit breaker, no-load, low-load, short circuit and

thermal overload protection on output and supply regulators.

Front Panel Mount

------

# PARAMETERS AA-10 TOLERANCE COMMENTS

12a Treble Control -10.5dB TO +10.5dB @ 12kHz ±4dB -----­12b Bass Control +10.5dB TO -10.5dB @ 100Hz ±4dB -----­13 Lo-Cut Switch -6dB @ 250Hz +1dB -2dB -----­ Automatic
14 Limiter
for paging
Automatic
15 Mute
Operation

16 Regulation

± 4dB output level maintained without

clipping, even while exceeding

rated input level up to 20dB.

Output level 1 watt for 40dB muting

No load to full load output

Less than 2dB

------

Min.

------

Paging inputs

Mute of music

Output while page

Is activated

Stability of amp.

With or

Without load

17 RFI Protection
18 Consumption

FRO idle

Rfi test: use CB transmitter output in same room -

minimum 20ft. from amplifier.

35 Watts
15 Watts

No pickup

-----­±5% @ 115VAC, 60Hz

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