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Radio Valve Data: 1915-1960Keith R Thrower OBE, The Valve Museum, April, 2022.
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Imported Triode Receiver Valves* | 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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Radiola | D | 3.0 | 0.06 | 20-80 | 1.0 | 45.0 | 0.23 | 10.3 | 1924 | | 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 | |
Radio Micro |
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless |
Bi-Volt | General-purpose triode | 1.8* | 0.20 | 40-80 | | - | - | | | | | | | B4 | 1 | 1926 |
D.E.06 | General-purpose triode | 3.5* | 0.06 | 40-80 | | - | - | | | | | | | B4 | 1 | 1926 |
D.E.2V | General-purpose triode | 2.0* | 0.20 | 30-100 | | - | - | | | | | | | B4 | 1 | 1926 |
D.E.4V | General-purpose triode | 4.0* | 0.06 | 30-100 | | - | - | | | | | | | B4 | 1 | 1926 |
H | Triode | 4.0* | 0.50 | 20-60 | | - | - | | | | | | | B4 | 1 | 1926 |
H.V.L. | Triode | 4.0* | 0.50 | 30-100 | | - | - | | | | | | | B4 | 1 | 1926 |
K | General-purpose triode | 2.0* | 0.06 | 30-100 | | - | - | | | | | | | B4 | 1 | 1926 |
M.R.3 | Triode | 3.5* | 0.06 | 40-80 | | - | - | | | | | | | B4 | 1 | 1926 |
| Output triode | 3.5* | 0.10 | 40-250 | | - | - | | 10.0 | | | | | B4 | 1 | 1926 |
Power | Output triode | 3.5* | 0.30 | 40-250 | | - | - | | 8.0 | | | | | B4 | 1 | 1926 |
Radiola | Triode | | | | | - | - | | | | | | | B4 | 1 | 1926 |
| General-purpose triode | 3.5* | 0.06 | 40-80 | | - | - | | 30.0 | | | | | B4 | 1 | 1926 |
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