23Z9
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BrandGeneral Electric
ClassDissimilar-Double-Triode Pentode
Base12-Pin Compactron
Filament23V @ 450mA
Construction
Primary TypeTriple Section
EnvelopeT9
Base MaterialGlass
SectionsMedium-mu triode, high-mu triode, and beam pentode
Filament / Heater
Warm-up Time11s
Heater NotesHeater voltage for a bogey tube at 0.45 A
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation7 W
Grid 2 Voltage190 V
Grid 1 Voltage150 V
Cathode Current70 mA
H-C Voltage200 V
Audio Performance
Key Features
- Compactron
- Vertical Output Service
- Vertical Oscillator
- Sync Clipper
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Section | 120V | 7100 | 11700 | - | 46mA |
| Triode Section 1 (High-Mu) | 150V | 3900 | 11000 | 43 | 2mA |
| Triode Section 2 (Medium-Mu) | 150V | 2350 | 8500 | 20 | 5mA |
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