273 Branchport Avenue
Long Branch, N.J. 07740 (732) 222-6880
INSTALLATION INSTRUCTIONS
MODEL TPA-60-B/TPA-100-B
PAGING AMPLIFIERS
GENERAL APPLICATION INFORMATION:
Wheelock models TPA-60-B and TPA-100-B Paging Amplifiers are output rated at 60 watts RMS and 100 watts RMS respectively.
These amplifiers afford a choice of five different inputs: two low impedance microphone inputs, one telephone paging input, and two high impedance auxiliary inputs. Three input channels allow three of these inputs to be used actively at one time: one microphone input, a choice of a telephone paging input or a second microphone input, and a choice of either one of two auxiliary inputs. 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 (ALC) 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 amplifiers feature individual input volume controls, as well as a master volume control, individual treble and bass controls, a low-cut horn protect switch, two input selector switches, an illuminated power on switch, an internal ALC (limiter) ON-OFF switch, an internal mute ON-OFF switch, a peak level indicator, and a line output jack.
Both models operate from 120 volts, 60Hz and have a power consumption of 180 watts (TPA-60-B) and 240 watts (TPA- 100-B). The units have a circuit breaker on the AC line input as well as a thermal breaker for overload protection on the output. The AC circuit breaker is manually resettable. IN THE EVENT THE CIRCUIT 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 amplifier is provided with a set of universal mounting brackets to facilitate either rack or surface wall mounting. Remove the 8 screws (4 on either side) holding the cover to the chassis. Choose the mounting required (rack or surface wall), and insert screws through the universal mounting bracket and back into the cover/chassis holes as shown in Figures 1 and 2.
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).
P82423 C
Sheet 1 of 10
RACK MOUNTING
FIGURE 1.
SURFACE WALL MOUNTING
For surface mounting, be sure to use hardware suitable for the mounting surface.
FIGURE 2.
POWER AND GROUNDING:
The 120 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, connect a wire from the GND terminal on the OUTPUT terminal strip to a water or steam pipe.
P82423 C
Sheet 2 of 10
TECHNICAL SPECIFICATIONS:
# |
PARAMETERS |
TPA-60-B |
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TPA-100-B |
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1 |
POWER OUTPUT |
60 WATTS RMS |
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100 WATTS RMS |
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@ 1 KHz |
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2 |
TOTAL HARMONIC |
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DISTORTION |
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LESS THAN 2% THD |
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3 |
OUTPUTS |
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4 ohms, 8 ohms, 25V, 70V |
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4 |
LINE |
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150 ohm, 1.1VRMS |
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OUTPUT |
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INPUTS |
TELEPHONE |
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MIC 1/MIC 2 |
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AUX 1/AUX 2 |
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5 |
IMPEDANCE |
600 ohm |
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600 ohm |
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47K ohms |
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6 |
SENSITIVITY |
-20 dBm |
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1 mV |
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220 mV |
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7 |
FREQ. RESPONSE |
300Hz - 4KHz |
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70Hz - 15KHz |
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70Hz - 15KHz |
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8 |
SIGNAL TO NOISE |
65dB |
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60dB |
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75dB |
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RATIO |
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9 |
TYPE OF INPUT |
XFMR |
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BALANCED |
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UNBALANCED |
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ISOLATED/BAL |
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OR UNBAL. |
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10 |
CONTROLS |
TEL/MIC 1, MIC |
2, AUX 1/AUX 2, |
INPUT LEVELS, |
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BASS, TREBLE, MASTER VOLUME, TEL/MIC 1 AND |
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AUX 1/AUX 2 SELECTOR SWITCHES, POWER ON/OFF |
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SWITCH, LO-CUT SWITCH, ALC (LIMITER) ON-OFF |
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SWITCH (INTERNAL), AUX MUTE ON-OFF SWITCH |
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(INTERNAL). |
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11 |
INDICATORS |
AMBER OR RED NEON - POWER ON |
RED LED - |
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PEAK LEVEL |
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12 |
PROTECTION |
AC LINE RESETTABLE CIRCUIT BREAKER AND |
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THERMAL OVERLOAD PROTECTION ON OUTPUT. |
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13a |
TREBLE CONTROL |
-10.5 dB TO +10.5 dB @ 12 KHz |
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13b |
BASS CONTROL |
+10.5 dB TO -10.5 dB @ 100 Hz |
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14 |
LO-CUT SWITCH |
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-6 dB @ 250 Hz |
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15 |
AUTOMATIC LIMITER |
+/-3 dB OUTPUT LEVEL MAINTAINED WITHOUT |
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FOR PAGING |
CLIPPING, EVEN WHILE EXCEEDING RATED INPUT |
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LEVEL UP TO 20 dB. |
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16 |
AUTOMATIC MUTE |
OUTPUT LEVEL 1 WATT FOR 40 dB MUTING |
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OPERATION |
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17 |
REGULATION |
NO LOAD TO FULL LOAD OUTPUT LESS THAN 2 dB. |
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18 |
CONSUMPTION |
180 WATTS MAX. |
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280 WATTS MAX. |
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19 |
SIZE |
15"W X 11.25"D X 4.125"H |
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20 |
WEIGHT |
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(38.1 X 28.6 X 10.1cm) |
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15lbs. (6.75Kg) |
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18lbs. (8.1Kg) |
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P82423 C Sheet 3 of 10
INPUT CONNECTIONS (FIGURES 3 & 4)
TELEPHONE PAGING INPUT (FIGURE 3): Connect telephone wires to the input screw terminals marked TIP and RING. Set TEL/MIC 1 Switch (on front panel) to TEL position. For Tip and Ring connections to various types of telephone
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