GAI-Tronics 478-002 Centra-Page Desktop Subset - Manual (Page 5)

Pub. 42004-120C
Model 478-002 Centra-Page Desktop Subset Page: 5 of 5
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-120c.doc
07/04
Specifications
Electrical
Handset:
Microphone ..................................................... 10 ohms; pressure differential, noise-canceling dynamic
Receiver .................................................... 150 ohms; high-efficiency dynamic, hearing-aid compatible
Cable .................................................................................. Retractile, 6-foot (1.82 m) extended, PVC
Material ...................................................................................................................... Light gray ABS
Control................................................................................................. Pressbar (push-to-page) switch
Frequency response.................................................................................................... 200–2000 Hz, +3 dB
Distortion ........................................Microphone input to receiver output 2 % (nominal line level @ 1 kHz)
Sidetone rejection................................................................................. 14 dB (nominal line level @ 1 kHz)
DC line current ........................................................................................................ Handset: 8 mA typical
Mechanical
Construction/finish:
Housing....................................................................................................................... Light gray ABS
Front panel and base............................................16 gauge CRS with black polyurethane enamel finish
External controls................................................ Rotary party line selector, integral speaker volume control
Connections ............................................................................... Internal, screw-type barrier terminal block
Integral speaker .............................. 3 sq. in., 45-ohm, 4-watt, moisture-proof, shielded magnetic pole piece
Temperature range, operating............................................................ -22
° F to +140° F (-30° C to +60° C)
Dimensions............................................... 9.35 L
× 10.46 W × 4.81 H inches (237.5 × 265.7 × 122.2 mm)
Shipping weight .................................................................................................................................5 lbs.
Approvals.......................................................................................................................................... None
Replacement Parts
Part Number Description
10450-004 Pressbar Handset Assembly
12511-001 Dynamic Noise-canceling Transmitter with Cap
12514-007 6-foot PVC Coil Cord
12550-002 Receiver Replacement Kit
25728-003 Housing/Hookswitch Assembly
61504-025 Speaker/Volume Control Harness Assembly
61504-049 Rotary Switch Harness Assembly
61504-029 Transformer Harness Assembly
69142-001 Termination PCBA