UCH81
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Triode Heptode
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HF Frequency Changer
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19 V, 0.1 A Heater
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Base B9A
Typical Operation
| Triode | Heptode | ||
| Va | 103 | 170 | V |
| Vg2 | ... | 102 | V |
| Vg1 | 0 | -2.2 | V |
| Ia | 4.5 | 3.2 | mA |
| Ig2 | ... | 6.8 | mA |
| Ra | 15 | ... | kΩ |
| Rg2+g4 | ... | 10 | kΩ |
| Rg3+gt | ... | 47 | kΩ |
| Rk | ... | 150 | Ω |
| gc | ... | 0.75 | mA/V |