GAI-Tronics Associated with 600-ohm systems Extended Range Page/Party System Manual - Manual (Page 3)

Pub. 42004-324A
Extended Range Page/Party
®
Systems Page: 3 of 10
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STEP 2 - Mounting of Station and Speaker Amplifier Enclosure
Each Page/Party ® system station includes a plug-in amplifier that mates with a fabricated steel, cast
aluminum, or molded reinforced non-metallic enclosure. Each enclosure provides terminal blocks for
connecting inter-station cabling. Enclosures are packed separately from the plug-in amplifiers at the
factory, allowing the amplifiers to remain protected while the enclosures are installed and wired —
particularly important during system installation in areas under construction.
The 16-gauge steel enclosures do not provide any openings for conduits or cables because the location of
these will vary with each installation. Drill or punch the necessary conduit openings before mounting the
enclosure. Locate the openings on either the top or bottom of the enclosure, and toward the rear of the box.
Avoid the top center because of possible interference with the plug-in amplifier receptacle. A drill template
is supplied with each enclosure.
Cast aluminum enclosures are drilled and tapped on the top and bottom for specially-designed hub plates.
Unless special arrangements are made, these enclosures include plates for single 1¼-inch conduit. Plates
for single ½-inch or 1½-inch, or dual 1¼ inch are available.
Molded (non-metallic) enclosures are supplied without any conduit openings. Sealed threaded hubs, such
as Myers “Scru-tite,” are recommended. A drill template is supplied with each enclosure.
CAUTION
Use caution when drilling holes to avoid damaging internal electrical components and wiring.
The suggested mounting height for all station enclosures is 54 inches (137 cm). Subsets used with remote
amplifiers are supplied with 8-foot (244 cm) cables. Enclosures for remote subset amplifiers must be
mounted within reach of the 8-foot cable. Desktop or desk-edge stations enclosures are often mounted in
the knee-well of the desk.
STEP 3 - Mounting of Line Balance Assembly
Each GAI-Tronics Page/Party ® system requires one Model 305-002 Line Balance Assembly. Its function
is to properly load the page and party line circuits. When using GAI-Tronics standard cable, select a
location that is:
• near the electrical center of the system
• adjacent to an indoor station in a relatively quiet area
• no more than 5 miles from the most distant station
The line balance assembly has one electrical adjustment that must be made while using a station (see
below). The following is the preferred method for mounting the line balance assembly:
1. Suspend the assembly from the lower side of the indoor wall station using a 1-inch conduit nipple (not
supplied).
2. Connect one twisted pair wire for the page circuit and another for each of the party lines between the
terminal blocks of the line balance assembly and the associated indoor wall station.
3. Make the wiring connections between the Model 305-002 Line Balance Assembly and the Model 702
and 703 Indoor Wall Station Enclosures in accordance with the wiring diagrams at the end of this
publication.