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Page Title:
Tools, Test Equipment, and Materials Required |
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|  TM 11-5820-509-35
are included in section II to aid the maintenance
whether normal values are being obtained and point out
technician in localizing an equipment malfunction.
the part of a specific circuit that may be defective.
e. Isolation. After the trouble has been localized to
(3) Electrical Inspection. The dc resistance of
a stage or a circuit, the final step is to isolate the
transformers and coils is shown in tabular form in
malfunction to a specific component. Methods for
section II to aid the maintenance technician in
performing this procedure include:
determining whether a winding is defective.
(1) Visual Inspection. Examine all resistors,
3-2. Tools, Test Equipment, and Materials Required
capacitors, vacuum tubes, transistors, coils, and other
The following table lists the test equipment required for
components associated with the faulty circuit for
troubleshooting Radio Set AN/PRC-47 at the direct
evidence of broken wires, burned insulation, and. other
support maintenance level. This list also shows the
obvious signs of physical damage.
technical manual identification number for each item
specified.
(2) Voltage and Resistance Measurements.
The voltage and resistance measurements provided in
section I! aid in determining
Test Equipment
FSN
Technical manual
Multimeter ME-26A/U
6625-542-8407
11-6625-200-15
Oscilloscope AN/USM-50
11-5129
Signal Generator SG-103/URM-25F
Frequency Counter AN/URM-79/U
Audio Oscillator TS-382/U
6625-246-8729
11-6625-935-12
Dummy Load DA-75/U
Cable Assembly Set AN/PRA-4
5995-973-3686
Output Meter TS-585/U
11-5017
Radar and Radio Repair Tool Kit TK-87/U
an antenna simulator and input/output cables that
Cable Assembly Set AN/PRA-4 (fig. 3-84) is used
simplify the bench testing procedures.
whenever the procedure requires measurement or
adjustment
within
a
module,
and
includes
Manufacturer's
Qty
Nomenclature
part number
Use
1
Special extender cable no. 1
549-6255-00
Extends Power Supply PP 3518/PRC 47 from
main chassis.
1
Special extender cable no. 2
549-6256-00
Extends Audio Frequency Amplifier AM
3506/PRC-47 from main chassis.
1
Special extender cable no. 3
549-6257-00
Extends Oscillator Control C 4311/PRC 47
from main chassis.
4
Special extender cable no. 4
549 6258-00
Extends Signal Data Translator CV
1377A/PRC 47 (4 reqd), Oscillator Control C
43 11 /PRC -47 (1 reqd), or Amplifier
Modulator AM 3507/PRC-47 (1 reqd) from
main chassis.
1
Special extender cable no. 5
549-6259-00
Extends Amplifier-Modulator AM-3507/PRC
47, or Radio Frequency Oscillator 0
1032/PRC-47 from main chassis.
1
Front panel test lead.
549-6260-00
Extends AUDIO connectors to test
microphone
and speaker.
1
Antenna test lead
549-6261-00
Connects to 50-ohm dummy load.
1
RG-58/U coaxial cable 3 ft. long
553-9759-002
Connects antenna simulator to 50-ohm
dummy load.
1
RG-58/U coaxial cable 5 ft. long
553-9760-002
Connects antenna simulator to test
equipment.
1
Adapter, BNC to Type N coax
357-9291-00
Transition fitting between RG-58/U and
dummy load.
1
Antenna simulator
553-9758-005
Simulates 15-foot whip antenna when con-
nected to 50-ohm load. 12 position switch
selects operating frequency.
1
Canvas carrying case
553-9764-003
Bag to store and transport Cable Assembly Set
An/PRA-4.
3-2
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