Tube-number record
1B77
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BrandAmperex
ClassBeta Counter Tube
BaseSpecial / none
Construction
Primary TypeOther / special
EnvelopeMetal Shell with Mica Window
Base MaterialStainless Steel
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1200 V
Audio Performance
Key Features
- Mica window
- Stainless steel cathode
- Quenched argon filling
- Infinite life expectancy
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Counter Operation | 1200 V | — | — | — | — |
Application Notes
Mica windows 5.6mg/cm2 thick will pass all beta radiation of energy in excess of 57 KEV when the source is in close proximity to the window.
Datasheets
Datasheet: 1B77.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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