Tube-number record
12AH8
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12AH8 is a tube type in the TubeDatabase archive (class: Triode-Heptode Frequency Changer). Recorded specifications: brand Brimar, construction Multi-section, base Noval, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1.5 W. The archive does not yet hold a photographed example of this type.
BrandBrimar
ClassTriode-Heptode Frequency Changer
BaseNoval (B9A)
Filament6.3 V @ 0.3 mA
Construction
Primary TypeMulti-section
EnvelopeT6 1/2
Base MaterialNoval
SectionsTwo units mounted one above the other
Filament / Heater
Heater NotesCentre tapped heater provided
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Heptode Section (100V HT) | 100 V | 520 | 600000 | — | 2.5 mA |
| Heptode Section (250V HT) | 250 V | 550 | 1500000 | — | 2.6 mA |
| Triode Section | 100 V | 3500 | 4850 | 17 | 14.6 mA |
Application Notes
Intended for use in all wave broadcast and communication receivers. Suitable for VHF 88 to 108 Mc/s band. AVC may be applied to the control grid.
Datasheets
Datasheet: 12AH8.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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