Power - Tetrode (NOT beam) ·Tetrode
3D23
Lewis Electronics 3D23 directly heated thoriated-tungsten multi-electrode RF transmitting power tube, provisionally classified as a tetrode, with 6.3 V 3 A filament and Class C output around 130 W.
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- 4
- Nominal heater
- 6.3 V / 3 A
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- 4
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 3 A
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Tetrode
- Transconductance
- 0.00275 S
- Amplification factor
- 65
- Max plate voltage
- 2000 V
- Max screen voltage
- 400 V
- Max plate dissipation
- 35 W
RMA 1945 Lewis Electronics 3D23 multi-electrode transmitting tube; section type Tetrode PROVISIONAL, electrode construction not definitively identified. At Va 1500 V, Ia 75 mA, screen 300 V: mu 65, gm 0.00275 A/V. Class C unmodulated maximum Va 2000 V, Ia 125 mA, screen 400 V, plate dissipation 35 W; typical Va 1500 V, Ia 110 mA, screen 375 V, RF output 130 W. Class C plate-modulated max Va 1250 V, Ia 100 mA, screen 350 V, typical output 60 W. Class B RF max Va 2000 V, Ia 50 mA, screen 400 V, typical output 35 W. Source specifies screen input 8 W, not unambiguously screen dissipation, so no screen-dissipation scalar populated. Interelectrode capacitances and frequency limit not determined by manufacturer. Filament 6.3 V AC 3 A, directly heated thoriated tungsten.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.