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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 |
GP (2V) | General-purpose triode | 1.8* | 0.20 | | | - | - | | | | | | | B4 | 1 | 1927 |
GP (4V) | General-purpose triode | 4.0* | | | | - | - | | | | | | | B4 | 1 | 1927 |
Power (2V) | Output triode | 4.0* | 0.06 | | | - | - | | | | | | | B4 | 1 | 1927 |
Power (4V) | Output triode | 4.0* | 0.25 | | | - | - | | | | | | | B4 | 1 | 1927 |
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