Additional Power Amplifier An external power amplifier can be used with the TPU250 amplifier. You must first add a resistor voltage divider to the telephone amplifier, as illustrated in Figure 8. Connect a patch cord to the high-level/high-impedance input of the booster amplifier.

Figure 8 : Output Circuitry

TO 25V OUTPUT TERMINAL

39K

1/2 W

TO HI-Z INPUT OF

BOOSTER AMPLIFIER

10K

1/2W

TO COM ON

TERMINAL STRIP

 

ACCEPTABLE

2WIRING

.....

.....

CLASS

 

.....

 

RCA Jack

-..A WMT

WMT1A

Amplifier

Figure 9 : WMT1A Connection to RCA Jack on Amplifier

Line-Matching Transformer An RCA jack is provided near the output terminal strip for connection to a WMT1A Connector WMT1A line-matching transformer. A 600-ohm, balanced telephone level output

signal can be obtained by plugging the RCA connector of the WMT1A line-matching transformer into this jack and taking the output signal off of the WMT1A line- matching transformer screw terminals (see Figure 9).This is useful for dividing a long line when connecting to remote equipment.

Output Cover Replacement When all output connections are made, remove the appropriate knockout on the input cover. Replace the cover and tighten the screws while dressing the wires through the knockout hole.

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Bogen TPU250 manual WMT1A
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