Tube-number record
3EH7/XF183
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BrandAmperex
ClassPentode
BaseNoval (B9A)
Filament3.4 V @ 600 mA
Construction
Primary TypePentode
EnvelopeT6 1/2
Sections1
Filament / Heater
Heater NotesControlled warm-up series string operation
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2.5 W
Grid 2 Voltage250 V
Grid 1 Voltage-50 V
Cathode Current20 mA
H-C Voltage150 V
Audio Performance
Key Features
- Frame grid
- Remote cut-off
- Controlled warm-up
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Characteristics | 200 V | 12500 | 500000 | — | 12 mA |
| Remote Cut-off Point 1 | 200 V | 1250 | — | — | — |
| Remote Cut-off Point 2 | 200 V | 625 | — | — | — |
| Remote Cut-off Point 3 | 200 V | 125 | — | — | — |
Application Notes
Designed for use as an IF amplifier in television receivers. High variable transconductance enables simplified broad band amplifiers with high stability.
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