Tube-number record
SP.41
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SP.41 is a tube type in the TubeDatabase archive (class: Pentode). Recorded specifications: brand Mazda, construction Pentode, socket Octal, and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
BrandMazda
ClassPentode
BaseOctal
Filament4 V @ 0.95 mA
Construction
Primary TypePentode
EnvelopeSmall dimensions, metallised
SectionsSingle
Filament / Heater
Heater NotesA.C. Mains
Absolute Maximum Ratings
Plate Voltage250 V
Grid 2 Voltage250 V
Audio Performance
Key Features
- Screened H.F. Pentode
- Metallised bulb
- High Mutual Conductance
- Designed for Television Receivers
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Video Output | 200 V | — | — | — | 22 mA |
| H.F. / I.F. Amplifier | 200 V | 7600 | — | — | 8.5 mA |
| H.F. / I.F. Amplifier | 200 V | 8500 | — | — | 10.9 mA |
| H.F. / I.F. Amplifier | 250 V | 8400 | — | — | 11.1 mA |
Application Notes
Used in H.F. and I.F. stages of television receivers. Suitable for frequency changers with conversion conductances up to 3000 µmhos. Capacity change due to space charge is approximately 4.25 pF.
Datasheets
Datasheet: SP41.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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