Allied Purchasing, Inc. 558 Schematic

Allied Purchasing, Inc. 558

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Product Information:
Model:558
Manufacturer:Allied Purchasing, Inc. (Aria)

Schematics Content

Page 1:

Frequency Range ..540-1600 kc.
V.C. Impedance... 3.5 ohms at 400 cycles
Intermediate Frequency...455 kc.
Power Output (Undistorted). 1.0 watt
Power Supply. -105-125 volts AC, 60 cycle
Power Output (Maximum) 1.5 watts
Loudspeaker..PM, 5 - inch
Tuning Drive Ratio.. 5 to 1

Page 2:

NOTE: All DC voltages measured with a 1000 ohm-per-volt mter from ON - OFF
switch (4B) to socket contact indicated. All AC voltages are measured from ON - OFF switch (B) to socket contact indicated. All voltages are positive DC unless otherwise marked. Volume Control full on. No signal. Line voltage 117 volts AC.

The following equipment is necessary to properly align this chassis:

A signal generator which will provide an accurately calibrated signal at the frequencies listed.
An output meter.
A non-metallic screwdriver.
Dummy antenna:.1 mfd. -RMA loop.

NOTE: Intermediate Frequency and Oscillator adjustments may be made with the loop disconnected provided a. resistor of 10,000 to 50,000 ohms is substituted to close the 12SATGT grid circuit. The loop alignment must be done with the loop and chassis mounted in operating position in the cabinet, A single turn loosely coupled to loop may be substituted for RMA loop.