Tube-number record
12Q7GP
0 archive entries
12Q7GP is a tube type in the TubeDatabase archive (class: Duplex-Diode High-Mu Triode). Recorded specifications: brand ARCTURUS, construction Triode, socket Octal, and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
BrandARCTURUS
ClassDuplex-Diode High-Mu Triode
BaseOctal
Filament12.5 V @ 150 mA
Construction
Primary TypeTriode
Rectifier TypeSignal Diode
EnvelopeGP
SectionsDuplex-Diode Triode
Filament / Heater
Heater NotesDesigned for series heater operation in AC-DC receivers
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 100 V | 1200 | 43000 | 60 | 2.5 mA |
| Triode Section | 250 V | 1200 | 58000 | 70 | 1.1 mA |
Application Notes
Type 12Q7GP is designed primarily for series heater operation in AC-DC receivers. Use of a small resistance in series with heaters eliminates the need for plug-in resistors or line cords.
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