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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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P1 | D | 3-4 | 0.06 | 30-120 | | | | | 1925 | | General purpose |
P2 | D | 1.8-2.0 | 0.06 | 30-120 | | | | | 1925 | B4 | General purpose |
P3 | D | 3.5-4.0 | 0.15 | 30-120 | | | | | 1925 | B4 | Output |
P4 | D | 3-6 | 0.30 | 200 | | | | | 1925 | B4 | Output |
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 | |
Dayros |
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless |
P1 | Triode | | | | | - | - | | | | | | | B4 | 1 | |
P2 | Triode | | | | | - | - | | | | | | | B4 | 1 | |
P3 | Output triode | | | | | - | - | | | | | | | B4 | 1 | |
P4 | Output triode | | | | | - | - | | | | | | | B4 | 1 | |
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