4527
0 Tubes in archive
BrandHeintz and Kaufman
ClassH.F./V.H.F. Power Pentode
BaseGiant 7-Pin Bayonet
Construction
Primary TypePentode
EnvelopeGlass
Sections1
Filament / Heater
MaterialThoriated-tungsten
Absolute Maximum Ratings
Plate Voltage4000 V
Plate Dissipation75 W
Grid 2 Voltage750 V
Grid 1 Voltage-500 V
Cathode Current150 mA
Audio Performance
Power Output315 W
Key Features
- Thoriated-tungsten filament
- Radiation and convection cooling
- Operates up to 150 Mc (with derating)
- High Frequency/VHF operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Video-frequency Power Amplifier - Class A1 (One Tube) | 1000V | - | 12000 | - | 75mA |
| Class C Telegraphy | 3000V | - | - | - | 100mA |
| Plate-Modulated Class C Telephony | 2500V | - | - | - | 100mA |
| Suppressor-Modulated Class C Telephony | 2000V | - | - | - | 55mA |
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