GAI-Tronics 305-002 Line Balance Assenbly (600-ohm) - Manual (Page 2)

Pub. 42004-323C
Model 305-002 600-Ohm Line Balance Assembly Page 2 of 2
f:\standard ioms - current release\42004 instr. manuals\42004-323c.doc
04/13
1. Remove the line balance assembly cover to expose the line balance control.
2. Lift the handset from the adjacent station and press the P AGE button.
3. Blow steadily into the handset microphone and adjust the control to minimize receiver sidetone.
4. After final adjustment, replace the cover and secure it with four mounting screws.
Each amplifier has a paging speaker volume control, accessible from the front panel with a screwdriver.
It is concealed behind the metal nameplate. To access the control, loosen (do not remove) the two
nameplate screws and pivot the nameplate around the left screw. This control is preset at the factory for a
moderate 4-watt output to the connected speaker.
For more detailed system installation information, please refer to GAI-Tronics Pub. 42004-324.
Figure 1. 305-002 Terminal Connections
Specifications
Terminations ............................ Barrier-type terminal blocks for field wiring to page and party line circuits
Mounting ....................................Mounting lugs or support by 1-inch NPT pipe nipple from handset station
Enclosure ................................... Cast aluminum two-gang outlet box with cast, dust-tight aluminum cover
Control ................................................................ Rheostat adjustment control provided for page line circuit
Finish .............................................................................................................................. Aluminum or epoxy
Dimensions .................................................... 5.30 H
 4.60 W  2.25 D inches (134.6  116.8  57.2 mm)
Shipping weight ........................................................................................................................ 2 lbs. (0.9 kg)