Tube-number record
SP.22
0 archive entries
SP.22 is a tube type in the TubeDatabase archive (class: Battery Screened H.F. Pentode). Recorded specifications: brand Mazda, construction Pentode, base Standard, socket Octal, and maximum plate voltage 150 V. The archive does not yet hold a photographed example of this type.
BrandMazda
ClassBattery Screened H.F. Pentode
BaseOctal
Construction
Primary TypePentode
EnvelopeMetallised
Base MaterialStandard
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage150 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| H.F. Amplifier 1 | 120 V | 900 | 2700000 | — | 5.5 mA |
| H.F. Amplifier 2 | 120 V | 1200 | 1350000 | — | 7 mA |
| H.F. Amplifier 3 | 120 V | 1200 | 1350000 | — | 11 mA |
Application Notes
The metal coating should always be connected to earth to avoid instability. When used as a detector with cumulative grid rectification, a screen voltage of 50-60 is recommended.
Datasheets
Datasheet: SP22.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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