Tube-number record
3BY7
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3BY7 is a tube type in the TubeDatabase archive (class: R.F. pentode with variable transconductance). Recorded specifications: brand Rogers Electronic Tubes & Components, construction Pentode, base Glass, socket Noval (B9A), maximum plate voltage 250 V, and maximum plate dissipation 2.5 W. The archive does not yet hold a photographed example of this type.
BrandRogers Electronic Tubes & Components
ClassR.F. pentode with variable transconductance
BaseNoval (B9A)
Filament3.4 V @ 600 mA
Construction
Primary TypePentode
EnvelopeT6 1/2
Base MaterialGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation 1 | 100 V | 5000 | 250000 | — | 5.5 mA |
| Typical Operation 2 | 173.5 V | 5990 | 300000 | — | 5.7 mA |
| Typical Operation 3 | 200 V | 6100 | 350000 | — | 11.4 mA |
Application Notes
When used at or near maximum ratings, it is advisable to keep Grid 1 circuit resistance as low as possible.
Datasheets
Datasheet: 3BY7.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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