15FM8
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ClassHigh Mu Triode and Beam Power Pentode
BaseButton 12 Pin, E12-74
Filament14.7V @ 600mA
Construction
Primary TypeCompactron
EnvelopeT-12
SectionsHigh Mu Triode, Beam Power Pentode
Filament / Heater
Heater Notes11 seconds warm-up time
Absolute Maximum Ratings
Plate Voltage400 V
Plate Dissipation12 W
Grid 2 Voltage300 V
Grid 1 Voltage400 V
Cathode Current75 mA
H-C Voltage200 V
Audio Performance
Key Features
- Compactron Construction
- Vertical Deflection Oscillator and Amplifier application
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 250V | 4100 | 14100 | 58 | 2.6mA |
| Pentode Section | 250V | 4100 | 5000 | - | 50mA |
Application Notes
For operation in a 525 line, 30 frame system as described in Standards of Good Engineering Practice for Television Broadcast Stations.
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