Page 11 of 22
VOLTAGE MEASUREMENTS (Volts d.c.)
TUBE
PIN NUMBER
1
2
3
4
5
6
7
8
9
V1
0
♯
1.0
0
AC 6.3
145
70
0
V2
75
ѻ
♯
-3.0
ѻ
0
AC 6.3 AC 6.3
40
♯
-0.4
♯
0.3
0
V3
0
♯
0.4
0
AC 6.3
80
20
0
V4
0
0
0
AC 6.3
140
85
♯
1.6
V5
0
0
0
AC 6.3
135
85
♯
1.2
V6
♯
-0.7
∆
1.5
∆
0
AC 6.3
80
∆
55
∆
0
V7
0
∆
0
0
AC 6.3
35
∆
35
∆
0.3
∆
V8
0
7.2
0
AC 6.3
0
140
120
♯
0.6
35
Table 1. Voltage measurements.
ѻ = Calibrator switched on
∆ = Mode switch in SSB/CW position
♯ = {
no idea and no indication on any of my reference documents
}
RESISTANCE MEASUREMENTS (ohms)
TUBE
PIN NUMBER
1
2
3
4
5
6
7
8
9
V1
∞
150
6K
18K
0
V2
100K
ѻ
1M
0
100K
100K
270
0
V3
100K
330
52K
500K
0
V4
∞
0
5K8
30K
180
V5
∞
0
5K6
11K5
150
V6
22K
220
34K
∆
20K
∆
4K7
V7
47K
0
70K
∆
70K
∆
220
V8
500K
•
220
470K
3K6
9K5
2K2
300K
Table 2. Resistance Measurements
ѻ = Calibrator switched on
•
= Audio gain set to maximum
∆ = Mode switch in SSB/CW position
Содержание FR-50B
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Страница 14: ...Page 14 of 22 PART LOCATIONS ...
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