Programme Distribution Amplifier PDA100

The PDA100 is a high quality audio amplifier designed for multiple distribution of recorded services over a telephone network. The unit has su1ficient capacity to drive up to 100 telephone lines at 0VU when each line is connected using building-out resistors.

Applications include;

1. Recorded voice announcements where good regulation is required and/or large numbers of subscribers/levels are fed.
2. Recorded information services such as time, sporting news and weather reports.
3. Leased network type distribution of speech and/ or music for switch programme or non-switched direct programme distribution.

Specifications:
Supply voltage:              46V to 54V DC
Line impedances:          150Ω, 600Ω and 1,200Ω
Input sensitivity:            -25 dBm to + 15 dBm (600Ω line)
Power capacity:             + 10 dBm into 100 lines of the same impedance when each line                                           is connected through building-out resistors.
Regulation :                   Output level change-no load to full load, less than 3 dB.
Frequency response:     Gain between 20Hz and 12kHz is no more than ±0.5 dB from the                                         1 kHz reference level.
Noise:                             Better than 90 dB below the output level of +37 dBm
Distortion:                       Less than 0.25% at 1 kHz (output level of + 37 dBm)

Here you find 194 models, 70 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Rola Company (AUS) Pty. Ltd.; Melbourne