Power - Triode Single (under 10W) ·Triode
3B-100B
Standard Valves 3B/100-B indirectly heated British five-pin audio power triode with 4 V 1.1 A heater, amplification factor 13 and maximum 10 W anode dissipation.
- Sections
- 1
- Base
- -
- Socket code
- -
- Base pins
- 5
- Nominal heater
- 4 V / 1.1 A
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- -
- Base pins
- 5
- Nominal heater voltage
- 4 V
- Nominal heater current
- 1.1 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
Triode
- Plate resistance
- 2000 Ω
- Transconductance
- 0.0065 S
- Amplification factor
- 13
- Max plate voltage
- 200 V
- Max plate dissipation
- 10 W
Standard Valves 3B/100-B single indirectly heated oxide-coated triode. At Va 200 V Vg -10 V: mu 13, rp 2000 Ω, gm 0.0065 A/V. Max direct anode 200 V, max direct anode current 50 mA, max plate dissipation 10 W. Capacitances Cga 7.5 pF, Cgk 10.3 pF, Cak 4.8 pF. Class A examples: 100 V/-4 V/23 mA/8000 Ω, 150 V/-6 V/40 mA/10000 Ω, 200 V/-10 V/40 mA/10000 Ω. Balanced Class B pair Va 200 V, Vg -16 V, 8–50 mA per valve, load anode-to-anode 4200 Ω. Standard British 5-pin base.
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.