Tube-number record
SP.61
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SP.61 is a tube type in the TubeDatabase archive (class: H.F. 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
ClassH.F. Pentode
BaseOctal
Filament6.3 V @ 600 mA
Construction
Primary TypePentode
EnvelopeMetallised
Sections1
Filament / Heater
Heater NotesA.C. Mains
Absolute Maximum Ratings
Plate Voltage250 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| H.F. Amplifier | 200 V | 8500 | — | — | 8.5 mA |
| H.F. Amplifier | 200 V | 8500 | — | — | 10.9 mA |
| H.F. Amplifier | 250 V | 8400 | — | — | 11 mA |
Application Notes
Specifically designed for H.F. and I.F. stages of television receivers with low input loss at high frequencies. Suitable for video output with loads down to 2600-3000 ohms. Capacity change due to space charge can be minimized by biasing the suppressor grid.
Datasheets
Datasheet: SP61.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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