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Radio Valve Data: 1915-1960Keith R Thrower OBE, The Valve Museum, April, 2022.
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Triode Receiver Valves (pre-1926)* | Type or Trademark | Filament | Anode | Grid | ra | gm | μ | Year | Base | Notes and applications | | | Volts | Amps | Volts | -Volts | kΩ | mA/V | | | | |
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B.E.Ω6LF | B | 4.0 | 0.40 | 20-100 | | | | | 1925 | | General purpose |
B.E.H.F. | B | 3.5 | 0.50 | 40-120 | 2.0 | 52.0 | 0.35 | 18.0 | 1925 | B4 | RF amp. and detector |
B.E.L.F. | B | 3.5 | 0.50 | 40-100 | 4.0 | 12.0 | 0.50 | 6.0 | 1925 | B4 | AF amplifier |
D.E.2 HF | D | 1.95 | 0.25 | 40-120 | 2.0 | 58.0 | 0.29 | 17.0 | 1926 | B4 | RF amplifier |
D.E.2 LF | D | 1.95 | 0.25 | 40-120 | 4.0 | 18.5 | 0.28 | 5.25 | 1926 | B4 | General purpose |
GP.4.V.B.E. | B | 4.0 | 0.60 | 30-100 | | 25.0 | 0.28 | 7.0 | 1925 | B4 | General purpose |
Post-1925 amplifying valves, frequency changers and signal diodes | Type | Description | Filament | Anode | Auxillary Grid | Grid | ra | gm/go | RL | Po | Rk | | Year | | | Volts | Amps | Volts | mA | Volts | mA | -V | kΩ | mA/V | kΩ | Watts | Ω | Type | Ref | |
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Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless |
2.V.D.E. | Probably D.E.2 | 2.0* | | | | - | - | | | | | | | B4 | 1 | 1926 |
4.V.D.E. | See G.P. | 4.0* | 0.60 | 30-100 | | - | - | | 25.0 | 0.28 | | | | B4 | 1 | 1925 |
B.E.76 LF | AF triode | 4.0* | 0.60 | 20-100 | | - | - | | 12.0 | 0.50 | | | | B4 | 1 | 1925 |
B.E.HF (note 1) | RF or detector triode | 3.5* | 0.50 | 40-120 | | - | - | 2.0 | 52.0 | 0.35 | | | | B4 | 1 | 1925 |
B.E.LF (note 1) | AF triode | 3.5* | 0.50 | 40-120 | | - | - | 4.0 | 12.0 | 0.50 | | | | B4 | 1 | 1925 |
D.E.06 HF | RF triode | 3.8* | 0.06 | 40-120 | | - | - | | 45.0 | 0.31 | | | | B4 | 1 | 1926 |
D.E.06 LF | AF triode | 3.8* | 0.06 | 40-120 | | - | - | 1.5-9.0 | 14.0 | 0.36 | | | | B4 | 1 | 1926 |
D.E.2 | Triode | 2.0* | 0.25 | | | - | - | | | | | | | B4 | 1 | 1925 |
D.E.2 HF (note 1) | RF triode | 2.0* | 0.25 | 40-120 | | - | - | 2.0 | 58.0 | 0.29 | | | | B4 | 1 | 1926 |
D.E.2 LF (note 1) | AF triode | 2.0* | 0.25 | 40-120 | | - | - | 4.0 | 18.5 | 0.28 | | | | B4 | 1 | 1926 |
D.E.3 HF (note 1) | RF triode | 2.0* | 0.20 | | | - | - | | 45.0 | 0.40 | | | | B4 | 1 | 1926 |
D.E.3 LF (note 1) | AF triode | 2.0* | 0.20 | | | - | - | | 14.0 | 0.36 | | | | B4 | 1 | 1926 |
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G.P. | General-purpose triode | 4.0* | 0.60 | 30-100 | | - | - | | 25.0 | 0.28 | | | | B4 | 1 | 1925 |
G.P.4.V.B.E. | See G.P. | 4.0* | 0.60 | 30-100 | | - | - | | | | | | | B4 | 1 | 1925 |
Orpheus M.P.2 | AF triode | 2.0* | 0.35 | | | - | - | | 12.o | 0.42 | | | | B4 | 1 | 1926 |
P.2 (note 1) | Output triode | 2.0* | 0.40 | | | - | - | 0-9 | 10.0 | 0.57 | | | | B4 | 1 | 1926 |
P.4 (note 1) | Output triode | 4.0* | 0.40 | | | - | - | | 14.5 | 0.34 | | | | B4 | 1 | 1926 |
P.6 (note 1) | Output triode | 6.0* | 0.25 | | | - | - | 3-12 | 6.5 | 0.85 | | | | B4 | 1 | 1926 |
(Note 1) These nine valves were shown later with 'Orpheus' preceding the type designation (See WW Supplement, April 6, 1927).
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