Tube-number record
12EQ7
0 archive entries
12EQ7 is a tube type in the TubeDatabase archive (class: Diode-Remote-Cutoff Pentode). Recorded specifications: brand Tung-Sol, year 1962, construction Multi-section, base Glass Button, socket Noval (B9A), maximum plate voltage 400 V, and maximum plate dissipation 3 W. The archive does not yet hold a photographed example of this type.
BrandTung-Sol
ClassDiode-Remote-Cutoff Pentode
BaseNoval (B9A)
Filament12.6 V @ 150 mA
Construction
Primary TypeMulti-section
EnvelopeGlass JEDEC 6-3
Base MaterialGlass Button
Sections2
Filament / Heater
Heater NotesUnipotential Cathode
Absolute Maximum Ratings
Plate Voltage400 V
Plate Dissipation3 W
Grid 2 Voltage400 V
Grid 1 Voltage-50 V
H-C Voltage200 V
Audio Performance
Key Features
- Remote-cutoff pentode
- Common cathode
- Internal shield
- AM detector tube
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 100 V | 4800 | 250000 | — | 9 mA |
Application Notes
Especially designed for use as combined IF-amplifier and AM-detector tubes in AM and AM/FM broadcast receivers.
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