Associated Merchandising Corp. 125P Schematic

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

Schematics Content:

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Page 1:

AMC PAGE 18-1

PERM TUNER
TRIMMER LOC ATUN

|259 |sr |.F. TRANSFORMER 404010 MFD-

|.409 2ND |_F_ TRANSFORMER 9-20'0 OUTPUT TRANSFORMER

azocrl voLuME coNTRoL a swlTuN (C) 20.201 L|NE cons a AMPLlcoRD ANTENNA

MODEL 125-? SCHEMATIC DIAGRAM

|.4 26 LOOP ASSEMBLY
BGJOB PERMEABILITY TUNER

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

POWER

CONSUMPTION 30 Watts.

TUNING RANGE: Broadcast: 545 to l620 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:

IZSA7 Converter
IZSK7 I. P. Amplifier

(C)John F. Rider

lZSQ7 Detector, Avc and Audio Amp.
SOLBGT Beam Power Amplifier
SSZSGT 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.

ASSOCIATED MERCHANDISING CORP. MODEL 125]?
__- P|Lor LAMP 41 J..-
ALL nesIsToa '/4wA1'r AND $23; __
ALL PAPER cAPAclrons2oo (R)

Page 2:

MODEL 12513 ASSOCIATED MERCHANDISING CORP.

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

(l) 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

(2) Adjustv the trimmers located at the top of the first and second I. I'` Trans-
tormers 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.

(S) 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) tor 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
during the above alignment procedure or serious mis-tracking will occur,
resulting in loss oi sensitivity at various points in the band.

TRIMMER AND TUBE LOCATION DIAGRAM

INSTALLATION: The Model lZ5-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 loca-
tions 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.

(C)John F. Rider

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