Table C -- TUBE SOCKET VOLTAGE CHART
THE VOLTAGE ARE READ BETWEEN THE SOCKET TERMINAL AND GROUND UNFER THE FOLLOWING CONDITIONS UNLESS OTHERWISE STATED
Headphones, Antenna and Ground discon-nected
Band Switch set for Band No. 1,200-500 kc.
Tuning Control set at 200 kc.
Crystal Control OUT position.
C.W. Oscillator OFF position.
Volume Control maximum
Dial Light Control maximum.
AVC-OFF-MVC Switch in MVC position.
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All readings taken with 1000 ohm per volt meter.
Plate and Screen voltages read on 500 volt scale. Other Voltages read on appropriate scales.
See last paragraph in 34b(1) regarding possibilities of fictious voltages when using socket analyzer.
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Socket Terminal or block | VT-117 1st R-F | VT-117 2nd R-F | VT-150 1st Det | VT-117 1st I-F | VT-177 2nd I-F | VT-116 3rd I-F | VT-233
2nd Det
C.W Osc | VT-152 Audio |
| 1 | Shell
0 V. | Shell
0 V. | Shell
0 V | Shell
0 V | Shell
0 V | Shell
0 V | Shell
0 V | 0 V. |
| 2 | Heater
16,18.9 | Heater
12.6 V | Heater
0 V | Heater
25.2 V | Heater
12.6 V | Heater
6.3 V | Grid
6V
Note D | Heater
25.3 V |
| 3 | Sup.
0 V | Sup.
3.8 V | Plate 210 V. 2 Ma | Sup
5.8 V | Sup 5.8 V | Sup16.5 V | Cathode
16.5 V.. | Plate
200 V.
18 Ma |
| 4 | Grid
0 V. | Grid
0 V. | Screen 100 V.
Note C
6.2 Ma | Grid
0 V. | Grid
0 V. | Grid
14 V | Diode
2 V | Screen
210 V
3.4 Ma |
| 5 | Cathode
3.8 V. | Cathode
3.8 V. | Osc. Grid
-4 V. | Cathode
5.8 V. | Cathode
5.8 V. | Cathode 16.5 V. | Diode
0 V | Grid
-8 V.
Note E |
| 6 | Screen
100 V.
2 Ma | Screen
85 V.
1.6 Ma | Cathode 0 V. | Screen
105 V.
1.6 Ma. | Screen
105 V.
1.6 Ma. | Screen
100 V.
.85 Ma | Plate 55 V.
Note B
(CW Osc On)
.95 Ma. | Tie
Terminal ,2 V. |
| 7 | Heater
12.6 V,. | Heater
6.3 V. | Heater
6.3 V. | Heater
18,9 V | Heater
18,9 V | Heater
0 V. | Heater
6.3 V. | Heater
18.9 V. |
| 8 | Plate
100 V
9 Ma | Plate
170 V
6 Ma | Grid
-1.8 V | Plate
185 V.
5.6 Ma. | Plate
210 V. 5.8 Ma. | Plate
210 V.
3.5 Ma. | Heater
12.6 V. | Cathode
0 V. |
Note A - The shell (no, 1 Terminal) of the 2nd r-f tube is not at ground potential but connected to the cathode. For that reason the flexible lead from the octal Socket Adaptor is not Inserted Into ground pin jack but is inserted into the Adaptor No. 3 outer pin jack.
Note B - 55 volts read at socket terminal 45 volts read with adaptor plug - see last paragraph of 34b(1).
Note C - 60 Volts read with analyzer. See Note D.
Note D - As read on 50 - volt scale.
Note E - As read on 500 - volt scale.
Note F - 650 volts read with analyzer. See Note B.
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