3AU6
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BrandTUNG-SOL
ClassPENTODE
Base7 PIN MINIATURE
Filament3.15V @ 0.6mA
Construction
Primary TypePENTODE
EnvelopeGLASS BULB
SectionsSINGLE
Filament / Heater
MaterialCOATED UNIPOTENTIAL CATHODE
Warm-up Time11.6s
Heater Notes600 MA SERIES HEATER OPERATED
Absolute Maximum Ratings
Plate Voltage340 V
Plate Dissipation3.5 W
Grid 2 Voltage320 V
H-C Voltage200 V
Audio Performance
Key Features
- SHARP CUT-OFF CONTROL CHARACTERISTICS
- HIGH TRANSCONDUCTANCE
- LOW GRID PLATE CAPACITANCE
- CONTROLLED WARM-UP
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| CLASS A1 AMPLIFIER - PENTODE CONNECTION | 100V | 3900 | 500000 | - | 5mA |
| CLASS A1 AMPLIFIER - PENTODE CONNECTION | 250V | 4500 | 1500000 | - | 7.6mA |
| CLASS A1 AMPLIFIER - PENTODE CONNECTION | 250V | 5200 | 1000000 | - | 10.6mA |
| CLASS A1 AMPLIFIER - TRIODE CONNECTION | 250V | 4800 | - | 36 | 12.2mA |
Application Notes
INTENDED FOR SERVICE AS EITHER AN RF OR AF AMPLIFIER IN 600 MA SERIES HEATER RECEIVERS.
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