Leander Electronics Corp. 707 Schematic

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Product Information:
Model:707
Manufacturer:Leander Electronics Corp.

Schematics Content:

Page 1:

A - BATTERY IS 4 1/2 VOLTS
B- BATTERY IS 67 1/2 VOLTS
B- BATTERY IS PLACED INSIDE OF LOOP FORM FOR INSTALLATION IN RECEIVER.
B- BATTERIES RECOMMENDED FOR THIS RECEIVER ARE EVEREADY, BOND AND WINCHESTER.

AC - DC BATTERY SW. ON TOP REAR OF CHASSIS SHOWN IN AC - DC POSITION

APPROX. GAIN PER STAGE USING CHANALYST AND WITH A FIXED BIAS OF -3V

Page 2:

NOTE: TUNING CAPACITOR IN MAXIMUM CAPACITY

TOP FRONT VIEW

IF ALIGNMENT

CONNECT AN OUTPUT METER ACROSS THE VOICE COIL OF THE RECEIVER. CONNECT A SIGNAL GENERATOR TO THE STANDARD HAZELTINE LOOP MODEL 1150 AND COUPLE IT LOOSELY TO THE RECEIVER LOOP.
SET THE SIGNAL GENERATOR TO 465 KC AND FULLY MESH THE RECEIVER TUNING CAPACITOR.
KEEP THE RECEIVER VOLUME CONTROL AT MAXIMUM, AND THE OUTPUT OF THE SIGNAL GENERATOR SUFFICIENT TO GIVE READABLE DEFLECTION ON THE OUTPUT METER.
ADJUST FOR MAXIMUM I.F. TRIMERS C8, C7, C6 AND C5.

RF OSC. ADJUSTMENT

KEEPING THE SAME SET UP AS USED FOR I.F. ALIGNMENT, SET THE SIGNAL GENERATOR AND RECEIVER TO 1600 KC AND ADJUST OSCILLATOR TRIMMER C2 FOR MAXIMUM OUTPUT
NEXT, SET THE SIGNAL GENERATOR AND RECEIVER TO 1400 KC AND ADJUST ANTENNA TRIMMER C4 FOR MAXIMUM OUTPUT.

Page 3:

ALL VOLTAGE AND RESISTANCE MEASUREMENTS MADE WITH RESPECT TO CHASSIS GROUND AND WITH A LINE VOLTAGE OF 116 V.A.C. AC - DC BATTERY SWITCH IS IN AC - DC POSITION

BOTTOM FRONT VIEW

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