Tube-number record
UAF41
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BrandPhilips
ClassDiode-Pentode
BaseRimlock
Filament12.6 V @ 0.1 mA
Construction
Primary TypeMulti-section
EnvelopeGlass
Base MaterialGlass
Sections2
Filament / Heater
Heater NotesA.C./D.C. series supply
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2 W
Grid 2 Voltage250 V
Grid 1 Voltage-1.3 V
Cathode Current10 mA
H-C Voltage150 V
Audio Performance
Typical THD1.8%
Key Features
- Variable-mu
- A.C./D.C. series supply
- Rimlock base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| H.F. or I.F. amplifier | 100 V | 1650 | 1000000 | 17 | 2.8 mA |
| H.F. or I.F. amplifier | 170 V | 1800 | 1200000 | 17 | 5 mA |
| H.F. or I.F. amplifier | 200 V | 1960 | 1300000 | 17 | 6 mA |
| L.F. amplifier | 170 V | — | — | 78 | 0.58 mA |
Application Notes
Diode-Pentode with variable-mu for H.F., I.F., or L.F. amplifier and detector or A.V.C.
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