TM 11-6625-291-14/TO 33A1-7-23-1
6-18. TESTING OF AUTOTRANSFORMER.
This task covers:
Testing
INITIAL SETUP
Equipment Condition
Tools
Output meter on workbench
Tool Kit, Electronic Equipment
TK-105/G
Test Equipment
Materials/Parts
Audio Oscillator TS-382A/U
None
Voltmeter ME-30A/U
Personnel Required
One technician
ACTION
ITEM
REMARKS
LOCATION
TESTING
Set to X.1 X 25 position (2.5 ohms).
Control knob (1)
1. Impedance network
2.
Carefully lift wiper arms, insert paper or
Wiper arms (2)
other insulating material under wiper arms.
3. Chassis, front
Connect the ground lead of audio oscillator
Audio oscillator (3)
to binding post G.
and binding post
G (4)
Connect other lead of audio oscillator to
4. Impedance control
Audio oscillator
inside row contact of impedance control.
(3) and inside
row contact (5)
Connect voltmeter across audio oscilla-
Voltmeter meter (6)
5. Audio oscillator
tor. Set voltmeter meter ON.
Adjust frequency to 10 KHz. Adjust output
6. Voltmeter meter
Audio oscillator (3)
unitl voltmeter reads 1 volt.
Voltmeter meter (6)
Remove voltmeter lead connected to un-
7. Audio oscillator;
grounded audio oscillator lead. Connect this
impedance network
and split ring
l e a d to the split ring segment of impedance
segment contact (7)
control.
See table for voltmeter reading range.
6-30
