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service instructions

ltor. All values are nominal and may vary 20 percent without degrading performance.

4.4 VOLTAGE AND RESISTANCE. MASUREMENTS

Table 4-3 lists voltage and resistance of all tube sockets of the KWM-2/2A except that of the vfo tube, V301. DO NOT OPEN the oscillator can. Refer to figure 7-2 for location of tube sockets. Measurements werc made under the following conditions:

  1. a. All measurements made with a vtvm and with all tubes in sockets. Unless otherwise noted in table, all measurements made with RF. GAIN at maximum, AF. GAIN at minimum, EMISSION switch in USB position, BAND switch in 14.2 position, vfo dial at 100, OFF-ON-NB-CAL switch in ON

  4.3 RECEIVER SIGNAL TRAClNG
  1. position. All voltages on transmitter tubes are taken with PTT jack j16 shorted to ground and MIC GAlN control full counterclockwise, but not far enough to close S10.

  2. b. Resistances of less than 0.9 ohm listed as zero .

  3. c. Resistance measurements made with po ver supply plug removed from Jl3.

  4. d. All measuremcnts made from tube soeket pins to ground.

  5. e. When two voltages are given for same tube pin, the first is for receive condition and the second for transmit condition.

    Warning

    800 volts dc is present on rear power connector J13 (pin 2) and inside pa compartment.

Table A-2. Receiver Signal Levels

TUBE PIN NUMBER PLATE
CAP
  1 2 3 4 5 6 7 8 9
V1
DC V
AC V
RES
275/1.5
(1)
10 KW
165/1.5
(2)
36KW
2.6
(3)
100 TO 1 KW
-
6.3
0
0
0
0
-1.6/-20

3.5 MW
0.40

180W
37/35

80 KW
-0.31/0.35

1 MW
 
V2
DC V
AC V
RES
275/245

10 KW
0
**6.5 (4)
600KW
**130

120 KW
-
6.3
0
0
0
0
**140

60 KW
**4.2
130/115

7 KW
130/115

58 KW
 
V3
DC V
AC V
RES
220/1.5

15 KW
145/1.4
(5)
36 KW
0.5/0

50 W
-
6.3
0
0
0
0
-1.5/-17

3.2 MW
5.6/7.5
(6)
1 KW
0/180
(7)
20/20 KW
0
(8)
0 TO 250 KW
 
V4
DC V
AC V
RES
0/250
(9)
11 KW
0/135
(10)
18 KW
0.1/1.7

92 to 101 W
-
6.3
0
0

0
-1.0/-1.0
(11)
1.5 MW/750
18/10
(12)
2 KW
275/72
(13)
36 KW
0/-0.8
 
V5
DC V
AC V
RES
275/215
(14)
12 KW
-44/-0.05
(15)
300 KW
0/2.1
(16)
250 W
-

0
0

0
275/215
(17)
12 KW
-41/0.05
(18)
300 KW
0/2.1
(19)
250W
-
6.3
0
 
V6
DC V
AC V
RES
0.3/220
(20)
25/15 KW
-6.0/0

90 KW
0/2.0

220 W
-
6.3
0
0
6.3
0
0.3/220
(21)
25/12 MW
-2.0/0.5

100 KW
0/2.0

220 W
0

0
 
V7
DC V
AC V
RES
-1.5/-1.1

2.5 KW
0

0
9
6.3
0
0

0
0

0
270/240

12 KW
150/125

30 KW
0

0
 
 
V8
DC V
AC V
RES
0/4

150 W
-65/0

28 KW
*0.3/180
22
23 KW
0

0
0
6.3
0
200/250

10 KW
0

0
0.3/180

23 KW
-65/0

28 KW
 

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