Tube-number record
TRIPLE-DIODE TRIODE
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BrandTUNG-SOL
ClassHigh-Mu Triode and Detector
BaseOctal
Filament12.6 V @ 150 mA
Construction
Primary TypeOther / special
EnvelopeT-9
Base MaterialIntermediate Shell 8-Pin Octal
Sections4 (1 Triode, 3 Diodes)
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation0.5 W
H-C Voltage90 V
Audio Performance
Typical THD5%
Key Features
- Coated unipotential cathodes
- One diode has a separate cathode
- Balanced discriminator or detector capability
- FM/AM combined detection
- Skirted miniature cap
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Unit Case 1 | 100 V | 900 | 110000 | 100 | 0.4 mA |
| Triode Unit Case 2 | 250 V | 1100 | 91000 | 100 | 0.9 mA |
Application Notes
Recommended that diode #4 (pin 3) and diode #3 (pin 4) be used in balanced detector circuits. One cathode is common to two diodes and the triode unit.
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