TM 11-5840-281-35/1
should be observed. The multimeter should not be used
somewhat from one transistor to another in the
on any ohms scale less than R x 100 when checking
same circuit without affecting operation. Collector
voltages of transistors should be relatively stable.
e. Before making any resistance measurements,
d. When measuring transistor voltages, insulate the
insure that all power is removed. To protect the
entire test prod, except for the extreme tip, with tape or
transistor, never connect the multimeter until it has been
sleeving. A momentary short can damage the transistors.
verified that the proper meter scale has been selected.
NOTE
The characteristics of transistors may cause the
emitter and base voltage readings to vary
f. Voltage Resistance Chart.
Pin
Unit and Tube
1
2
3
4
5
6
7
8
9
Radar transmitter A200
V1
R
.............
..............
0.5
...............
1
V2
R
76k
0
0
0
cap: 760k
Note. Conditions for vr measurements: On master Control-Indicator C-6988/TPN-18, SCAN MODE switch
Sensitivity time
control A3900
placed to 35 EL, STC switch to ON, EL TARGET control fully ccw, and I-F GAIN control adjusted so pin 7
of tube V3902 in sensitivity time control measures - 5v.
V1
V
+95
6.3 vac
-5.5
- 5.5
6.3 vac
-6.2
+50
............
R
FIL
5k
5k
FIL
14k
................................
V2
V
+100
-5.8
6.3 vac
-6.4
-1.2
6.3 vac
-3.2
+100
............
......
R
3.7k
FIL
5k
10k
FIL
.....................................................
V3
V
+100
-33
6.3 vac
-29
-0.75
6.3 vac
-1.45 .............................................
R
3.1k
FIL
2.8k
2.9k
FIL
8.5k .............................................
Intermediate
Note. Conditions for vr measurements: On master Control-Indicator C-6988/TPN-18, SCAN MODE switch
0
Frequency
placed to 35 EL, STC switch placed to ON, EL TARGET control fully ccw, and I-F GAIN control adjusted so
Amplifier
pin 7 of tube V3902 in sensitivity time control circuit card measures -5v.
AN-3337
TPN-8 A1300
V1
V
+85
................
6.3 vac
-22.5
.................
-21
..................................... ...........
R
...................................
FIL
10k
10k
11k
10k
10k
FIL
V2
V
+88
................
6.3 vac
-22
.................
-21.5
...................................................
R
...................................
FIL
10k
10k
11k
10k
10k
FIL
V3
V
0.0
+1.25
........................................ +90
6.3 vac
+90
+1.25
...........
R
100k
150
FIL
......................................
FIL
................... 150
...........
V4
V
0.0
+1.4
........................................ +90
6.3 vac
+92.5
+1.4
...........
R
100k
200
FIL
......................................
FIL
................... 200
...........
Intermediate
Note. Conditions for vr measurements: On master Control-Indicator C-6988/TPN-18, SCAN MODE switch
0
placed to 35 EL, STC switch placed to ON, EL TARGET control fully ccw, ad I-F GAIN control adjusted so
Amplifier
pin 7 of tube V3902 in sensitivity time control circuit card measures -5v.
AM-3338/
TPN-8- A3600
V1
V
0.0
+1.5
6.8 vac
.................
+100
................
+100
+1.5
..........
R
1.2
165
FIL
FIL
150k
FIL
150k
165
..........
V2
V
..............
+1.5
6.3 vac
.................
+100
................
+100
+1.5
..........
R
1.4
160
FIL
FIL
260k
FIL
250k
160
..........
V3
V
..............
+1.5
6.3 vac
.................
+100
................
+100
+1.5
..........
R
1.4
160
FIL
FIL
260k
FIL
250k
160
..........
3-16
Previous Page
