Dc Resistance of Transformers

16-30APM123-2/TO 33A1-3-367-22

TM 11-6625-667-45/NAVSHIPS 0969-249-8010/NAVAIR

one transformer to another; the chart values are

3-10. Removal of Transmitter A16 for Trouble-

typical average values.

shooting

(3) The normal resistance of replacement

(fig. 3-7)

transformers may differ greatly from the values

To reach transistor and tube sockets for trouble-

given in the chart.

shooting, remove the transmitter from its case. Do

(4) Special attention should be given to the

this by removing the 10 screws around its outer

resistance balance between windings of trans-

perimeter, then withdrawing the transmitter from

former A14T1. Refer to figure 8-6 and determine

its case This action also exposes regulator sub-

whether transformer windings associated with

assembly A16A2 and transistors A16Q1 and

each square wave multi vibrator are within 5 per-

A16Q2, all located within the transmitter (fig.

cent of each other.

8-25).

b. The following chart contains dc resistance of

transformer A15T1 and A14T1.

3-11. Dc Resistance of Transformers

Resistance

Winding

Transformer

(ohms)

a. The dc resistance data (b below) is provided

1-2

A14T1-------------------------

as an aid to trouldeshooting. When using the data,

1.2

3-4

observe the following:

4-5

1.2

(1) Before making resistance measurements

6-7

8-9

2.6

of the windings, determine that faulty operation is

10-11

1.2

likely due to a faulty transformer or coil. To do

1.2

11-12

this, follow the troubleshooting procedures (paras

13-14

3-5 and 3-6d).

800

15-16

17-18

12. 5

(2) Do not use the resistance measurements

1-2

A15T1-------------------------

as the sole basis for discarding a transformer as

2-3

1.8

4-5

0.5

during manufacture, resistances may vary from

6-7

0.5

3-40