Associated Merchandising Corp. 125P Schematic

Associated Merchandising Corp. 125P

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Product Information:
Model:125P
Manufacturer:Associated Merchandising Corp. (AMC)

Schematic Pages

PNG: Page 1 Rider Manual Volume 18
PNG: Page 2 Rider Manual Volume 18

Schematics Content

Page 1:

ASSOCIATED MERCHANDISING CORP.

MODEL 125P

MODEL 125 - P SCHEMATIC DIAGRAM

LINE VOLTAGE: This receiver is designed for operation on 105-125 Volts, 50-60 Cycles, either Alternating or Direct Current (AC - DC).

POWER CONSUMPTION 30 Watts.

TUNING RANGE: Broadcast: 545 to 1620 Kilocycles (185 to 550 meters).

DIAL: The Dial Scale is calibrated in Kilocycles times 10 to correspond with newspaper or periodical listings.

TUBES: The tubes used and their functions are as follows:

12SAZ Converter
12SQ7 Detector, Avc and Audio Amp.
12SK7 I.F. Amplifier
50L6GT Beam Power Amplifier
35Z5GT Rectifier

CAUTION: If this receiver is operated on D.C. (Direct Current), and you cannot obtain reception although the tubes are lighted, reverse the line cord plug to obtain the correct polarity. Objectionable hum or noise may also be eliminated on A.C. operation by reversing the line cord plug.

Page 2:

ASSOCIATED MERCHANDISING CORP.
MODEL 125P

ALIGNMENT: Should it become necessary at any time to check the alignment of this receiver, proceed as follows:

(1) Set the Signal Generator to 455 KC and connect to the Antenna Trimmer (C1) of the Permeability Tuner. Connect the Signal Generator ground lead to the chassis. Connect a suitable Output Meter across the Speaker Voice Coil Connections. Turn the Volume Control to the maximum position. Turn the Permeability Tuner to the extreme clockwise position (cores out
of coils).

(2) Adjust the trimmers located at the top of the first and second I.F. Transformers for maximum output as indicated on the Output Meter.

(3) Set the Signal Generator to 1620 KC and loosely couple through a 2 or 3 turn loop to the receiver loop.

(4) With the Permeability Tuner set at the extreme clockwise position (cores out of coils), tune in the 1620 KC signal by means of the Oscillator Trimmer (C2).

(5) Set the Signal Generator to 1500 KC and turn the Tuning Control so that this frequency is indicated on the dial. Adjust the Antenna Trimmer (C1) on the Permeability Tuner for maximum output.

(6) Set the Signal Generator to 600 KC and turn the Tuning Control so that this frequency is indicated on the dial. Adjust the Oscillator Shunt Coil (C3) for maximum response while "rocking" the Signal Generator. Recheck the High Frequency Oscillator Trimmer (C2) and re-peak the Antenna Trimmer (C1) for maximum response.

Note: Oscillator and Antenna Coil Saddles have been set and adjusted at the factory. Do not attempt to readjust the Oscillator or Antenna Coil Saddles duri the above alignment procedure or serious mis-tracking will occur, resulting in loss of sensitivity at various points in the band.

TRIMMER AND TUBE LOCATION DIAGRAM

INSTALLATION: The Model 125 - P is complete in every detail for efficient and immediate operation. A self-contained Loop Antenna is included, which will give excellent results in most locations. Due to the directional properties of the Loop, it may be advantageous to turn the receiver to the left or right in noisy locations for maximum signal and minimum noise. A best position for reception can always be found. The "Amplicord" Antenna which is part of the line cord should be fully extended for reception of weak stations. In unfavorable locations where distant reception is required, a well-constructed outside antenna may be used, and connected to the Green wire labeled " Ant. " at the rear of the Loop.