Introduction:
The table below represents the typical operating voltages present at various
points in the 6x2 receiver. These measurements are valid for this particular
receiver only and are valid only under the conditions indicated. Values for
other receivers may be considerably different depending on power supply
components and other factors.
Operating Voltage
Table
| Function | Tube Designator |
Tube Type |
Pin 1 | Pin 2 | Pin 3 | Pin 4 | Pin 5 | Pin 6 | Pin 7 | Pin 8 | Pin 9 |
| Mixer | V1 | 6GH8A (6U8A) |
90.7 | 0 | 108.0 | 0 | 6.3AC | 202.2 | 4.42 | 0 | -5.71 |
| Detector/BFO | V2 | 6CG7 | 42.8 | -8.14 | 0 | 0 | 6.3AC | 29.83 | -1.673 | 0 | 0 |
| 1st Audio | V3 | 12AU7 (12AX7) |
43.5 | 0 | 1.963 | 6.3AC | 6.3AC | NC | NC | NC | 0 |
| IF Amplifier | V4 | 6BA6 | 0 | 0 | 0 | 6.3AC | 194.1* | 152.8* | 8.18* | ||
| Audio Output | V5 | 6AQ5 | 0 | 9.23 | 0 | 6.3AC | 192.4 | 202.2 | 0 | ||
| Rectifier | V6 | 5Y3 | 261.6 | NC | NC | 271.0AC | NC | 271.7AC | NC | 261.6 | |
| Voltage Regulator | V7 | 0C3 | NC | 0 | NC | NC | 108.2 | NC | NC | NC | |
| Crystal Calibrator** | V8 | 6BA6 | -31.15 | 0 | 0 | 6.3AC | 18.34 | 47.9 | 0.672 | ||
| Accessory Socket | ACC | 0 | 108.2 | 249.6 | NC | NC | 6.3AC | NC | 0 |
Measurement Conditions:
All measurements were taken at a line voltage of 114.6V AC as measured with an
AC RMS voltmeter.
All measurements were taken with the IF Gain control half way up and the
crystal calibrator turned off, except for the measurements for V8, where the
crystal calibrator was turned on..
All measurements are in DC volts unless otherwise indicated.
All DC measurements were taken with an 11 Mohm input voltmeter with a 3.2 mH RF
choke in series with the tip of the positive lead to isolate the voltmeter from
any RF that might have been present.
All AC voltages were taken with an AC RMS voltmeter.
*Critically depend on setting of the IF gain control. Values shown are with IF
Gain Control half way up.
**Voltages are present only when the crystal calibrator is turned on.
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