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921 photocell
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This valve measures 42x21mm overall |
| Spectral response | S-1 |
| Wavelength of maximum response | 8000 ± 1000 Angstroms |
| Direct interelectrode capacitance | 1pF |
| Max anode supply voltage | 90V |
| Max peak cathode current | 10µA |
| Max peak cathode current density | 100µA/sq.in. |
| Max average cathode current | 3µA |
| Max ambient temperature | 100°C |
| Max dark current at 90V | 0.1µA |
| Gas amplification factor | 10 |
Referring to the photo, the cathode connector is at the top
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