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Radio Valve Data: 1915-1960Keith R Thrower OBE, The Valve Museum, April, 2022.
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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 |
205 (GP) | Triode | 2.0* | 0.05 | | | - | - | | | | | | | B4 | 1 | 1927 |
210 (SP) | Output triode | 2.0* | 0.10 | | | - | - | | | | | | | B4 | 1 | 1927 |
220 (GP) | Triode | 2.0* | 0.20 | | | - | - | | | | | | | B4 | 1 | 1927 |
406 (GP) | Triode | 4.0* | 0.06 | | | - | - | | | | | | | B4 | 1 | 1927 |
420 (GP) | Triode | 4.0* | 0.20 | | | - | - | | | | | | | B4 | 1 | 1927 |
420 (SP) | Output triode | 4.0* | 0.20 | | | - | - | | | | | | | B4 | 1 | 1927 |
E.2P | Output triode | 2.0* | 0.15 | 150 | 7.0 | - | - | 18.0 | 4.2 | 1.20 | | | | B4 | 1 | 1927 |
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