Dc Resistance of Coils and Transformer Windings

TM 11-5820-509-35

come in contact with one another or

(3) Signal Data Translator CV-1377A/PRC-

with

the

module

chassis.

47/A8A3 ) (fig. 7-11 ).

Component damage can result.

Ref des

Terminal no.

Resistance (ohms)

A3K1

3 to 4

1,000 10%

c. If abnormal voltage readings are obtained,

A3L1

1 to 2

Less than 1 ohm

remove all power from the module being tested and

conduct dc resistance measurements throughout the

A3L81

suspected circuit or stage to isolate any open- or short-

A3L98A

1 to 2

Less than 0.02 ohms

circuit conditions, or defective parts. Refer to the

A3L98B

3 to 4

Less than 0.02 ohms

A3L100

1 to 2

11.1 10%

module schematic diagrams, (fig. 7-8 through 7-14), or

A3L101

1 to 2

7.5 10%

to the transformer and coil resistance data shown in

A3L102

1 to 2

2 10%

paragraph 3-7.

A3L103

1 to 2

Less than 0.02 ohms

A3L120

1 to 2

11.6 10%

d. Trouble that does not completely disable the

A3L121

1 to 2

10 10%

equipments, but which results in decreased receiver

A3L125

1 to 2

Less than 1 ohm

sensitivity or transmitter power output can be difficult to

isolate and may become time-consuming. When such

A3L134

A3L135

1 to 2

1.65 10%

symptoms are evident, and all circuit checks fail to

A3L136

1 to 2

Less than 1 ohm

indicate a defective part, check the alignment of the

receiver-transmitter /chapter 4) or consult the

A3L145

adjustment routines of section VI.

A3T1

A to B

Less than 0.1 ohm

3-7.

Dc Resistance of Coils and Transformer

(4) Power Supply PP-3518/PRC-47 (A8A5)

Windings

(fig.. 7-12).

a. The dc resistance of coil and transformer

windings is shown in the following charts.

Ref des

Terminal no.

Resistance(ohms)

A5K1

1 to 2

300 10%

(1) Audio Frequency Amplifier AM-3606/PPC-

A5L1

1 to 2

3 10%

47 (A8A1 ) ( fig. 7-9 ).

A5T1

1 to 2

.2 10%

Ref des

Terminal no.

Resistance (ohms)

A5T1

2 to 3

.2 10%

A5T1

3 to 4

.2 10%

A1K1

1 to 2

800 20%

A5T1

4 to 5

.3 10%

A1L1

1 to 2

180 10%

A5T1

6 to 7

13 10%

A1L2

1 to 2

30 10%

A5T1

8 to 9

18.2 10%

A1L2

2 to 3

420 10%

A5T1

10 to 11

65 10%

A1L3

1 to 2

420 10%

A5T1

12 to 13

.3 10%

A1TI

Yellow to green

190 25%

A5T1

13 to 14

.2 10%

A1TI

Red to blue (R12 connected)

780 25%

A5T1

15 to 16

55 10%

A1T2

1 to 2

150 10%

A5T2

1 to 2

12.2 10%

A1T2

3 to 4

15 10%

A5T2

3 to 4

.7 10%

A1T3

1 to 2

325 10%

A1T3

3 to 4

100 10%

(5) Radio Frequency Oscillator 0-1032/PRC-

A1T3

4 to 5

100 10%

47 (A8A6) (fig. 7-13).

A1T5

1 to 2

80 10%

Ref des

Terminal no

Resistance (ohms)

A1T5

2 to 3

80 10%

A6L1

1 to 2

2.6 10%

A1T5

4 to5

100 10%

A6L2

1 to 2

11.6 10%

(2) Amplifier-Modulator

AM-3507/PRC-47

A6L3

1 to 2

7.5 10%

(A8A2)) (fig. 7-10).

A6L4

1 to 2

16.5 10%

A6L5

1 to 2

3.9 10%

Ref des

Terminal no.

Resistance (ohms)

A6L6

1 to 2

72 10%

A2L1

1 to 2

50 10%

A6L7

1 to 2

29 10%

A2L2

1 to 2

16.5 10%

A6L8

1 to 2

21 10%

A2L3

1 to 2

50 10%

A6L9

1 to 2

72 10%

A2L4

1 to 2

4 10%

A2L5

1 to 2

29 10%

(6) Oscillator Control C-4311/PRC-47 (A8A7)

A2L6

1 to 2

3 10%

(Fig. 7-14)

A2L7

1 to 2

3.5 10%

Ref des

Terminal no

Resistance (ohms)

A2L8

1 to 2

29 10%

A7L1

1 to 2

4.5 10%

A2L9

1 to 2

72 10 %

A7L2

1 to 2

2.6 10%

A2L10

1 to 2

50 10 %

A7L3

1 to 2

50 10%

A2T2

1 to 3

1 10 %

A7L4

1 to 2

11.6 10%

A2T2

4 to 6

0.5 10 %

A2T3

1 to 3

5 10 %

A2T3

4 to 6

1 5 10 %

3-88