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VR505 / MH41 / 10E/631 triode
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This valve measures 107x42mm overall and has a B5 base. |
| Heater voltage | 4V |
| Heater current | 1A |
| Max anode voltage | 250V |
| Mutual conductance | 6.0mA/V * |
| Anode impedance | 13.5k ohms * |
| Amplification factor | 80 * |
*: At Va=100, Vg=0
| Pin | Function |
| 1 | Anode |
| 2 | Grid |
| 3 | Heater |
| 4 | Heater |
| 5 | Cathode |
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