GAI-Tronics 701-312 Handset/Speaker Amplifier - Manual (Page 4)

Pub. 42004-319
Model 701-312 Page/Party
®
600-Ohm Handset/Speaker Amplifier Page: 4 of 5
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Problem Solution
Feedback occurs only during
page. Use the muting feature in the amplifier enclosure at the terminal blocks.
Connect the violet wire at terminal 8 to terminal 7.
Sidetone (how the operator
hears his own voice) requires
adjustment. 1. Adjust the receiver sidetone at the amplifier, using the extension
ribbon cable as described above.
2. Check that the line balance assembly resistors are connected
properly.
Crosstalk occurs. One or more system cable pairs may be improperly terminated. Visually
inspect the system cable connections for accidental crossing of the cable
pairs or grounds.
Specifications
Amplifier
Power requirements
Voltage......................................................................... 90–140 V ac range, 50/60 Hz, 115 V ac nominal
Power consumed: Zero/max. signal (12 watts) .............................................10 VA, 4.5 W/50 VA, 27 W
Construction/finish........ ........................................................16-gauge cold-rolled steel/gray baked enamel
Handset
Microphone ........................................................................................................ Dynamic, noise-canceling
Receiver ........................................................................Dynamic, hearing aid compatible per FCC Part 68
Cable.........................................................................................................Retractile, 6-foot extended PVC
Material..................................................................................................................................... Gray ABS
External controls.................................................................................Push-to-page switch or push-to-page
handset pressbar, handset hook-switch
Handset Amplifier
Output level....................................................................................... 1.5 Vrms nominal into 600 ohm load
Output limiter .................................................................................................................1.5 Vrms nominal
Gain ................................................................................................... 55 dB nominal (below limiter level);
adjustable from 40 to 63 dB
Frequency response..............................................................................................250–4,000 Hz, +/-1.5 dB
Distortion .................................................................................................. 1.5% maximum THD @ 1 kHz
Controls..............................................................................Microphone gain, receiver volume and sidetone