Tube-number record
50FY8
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BrandSylvania
ClassTriode-Pentode
BaseNoval (B9A)
Filament50 V @ 150 mA
Construction
Primary TypeMulti-section
EnvelopeT-6 1/2
Base MaterialGlass
SectionsTriode, Beam Pentode
Filament / Heater
Heater NotesSeries heater string
Absolute Maximum Ratings
Plate Voltage150 V
Plate Dissipation10 W
Grid 2 Voltage150 V
H-C Voltage200 V
Audio Performance
Typical THD10%
Power Output3 W
Key Features
- High mu triode
- Beam Power amplifier
- T-6 1/2 envelope
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 125 V | 2700 | 17000 | 46 | 2.5 mA |
| Pentode Section | 125 V | 7500 | 5000 | — | 70 mA |
Application Notes
Type 50FY8 contains a high mu triode and Beam Power amplifier. The Beam Pentode is capable of furnishing 3 watts of output at a B+ voltage of 125 volts.
Datasheets
Datasheet: 50FY8.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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