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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 | 4.5 | 0.65 | 30-120 | 0-6.0 | 20.0 | 0.45 | 9.0 | 1925 | | General purpose |
DE.11 | D | 1.1 | 0.25 | 20-100 | 0-6.0 | 18.0 | 0.36 | 6.5 | 1925 | B4 | General purpose |
SP.18 (red spot) | O | 1.8 | 0.30 | 20-120 | 0-6.0 | 7.5 | 0.93 | 7.0 | 1925 | B4 | AF amp./output |
SP.18 (green spot) | O | 1.8 | 0.30 | 20-120 | | 17.0 | 0.88 | 15.0 | 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 | |
Cosmos |
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless |
| General-purpose triode | 4.0 | 1.00 | 180 | | - | - | | 14.0 | 2.50 | | | | C5 | 1 | 1927 |
AC/P1 | Output triode | 4.0 | 1.00 | 200 | | - | - | | 2.0 | 2.50 | | | | C5 | 1 | 1928 |
AC/P2 | Output triode | 4.0 | 1.00 | | | - | - | | 2.0 | 2.50 | | | | C5 | 1 | 1928 |
| Output triode | 4.0 | 1.00 | 180 | | - | - | | 2.5 | 4.00 | | | | C5 | 1 | 1927 |
AC/S | RF tetrode | 4.0 | 1.00 | 150 | | | | | 800.0 | 1.50 | | | | C5+tt | 2 | 1928 |
AC/X | General-purpose triode | 4.0 | 1.00 | 200 | | - | - | | 17.0 | 0.60 | | | | C5 | 1 | 1928 |
DE50 | General-purpose triode | 6.0* | 0.09 | 30-100 | | - | - | | 20.0 | 0.45 | | | | B4 | 1 | 1927 |
| General-purpose triode | 6.0* | 0.09 | | | - | - | | 18.0 | 0.50 | | | | B4 | 1 | 1926 |
| RCC triode | 2.0* | 0.09 | 80-120 | | - | - | | 70.0 | 0.50 | | | | B4 | 1 | 1928 |
| General-purpose triode | 2.0* | 0.09 | 150 | | - | - | | 17.0 | 0.95 | | | | B4 | 1 | 1928 |
SP16/R | Output triode | 2.0* | 0.09 | 100 | | - | - | | 10.0 | 0.90 | | | | B4 | 1 | 1927 |
| AF or output triode | 1.8* | 0.30 | 30-120 | | - | - | | 8.0 | 0.88 | | | | B4 | 1 | 1925 |
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| RCC triode | 2.0* | 0.09 | 120 | | - | - | | 70.0 | 0.50 | | | | B4 | 1 | 1926 |
SP18/G | RF or RCC triode | 2.0* | 0.30 | 20-120 | | - | - | | 17.0 | 0.88 | | | | B4 | 1 | 1925 |
| Output triode | 2.0* | 0.30 | 20-120 | | - | - | 0-9 | 7.5 | 0.90 | | | | B4 | 1 | 1925 |
| Output triode | 2.0* | 0.30 | 100 | | - | - | | 4.5 | 1.40 | | | | B4 | 1 | 1927 |
SP50/B | RF or RCC triode | 6.0* | 0.09 | | | - | - | | 50.0 | 0.70 | | | | B4 | 1 | 1927 |
SP50/R | Output triode | 6.0* | 0.25 | 30-120 | | - | - | | 4.5 | 1.70 | | | | B4 | 1 | 1928 |
SP55/B | RF or RCC triode | 6.0* | 0.09 | 60-120 | | - | - | | 55.0 | 0.64 | | | | B4 | 1 | 1926 |
| Output triode | 6.0* | 0.25 | | | - | - | | 3.5 | 1.70 | | | | B4 | 1 | 1926 |
SP60/B | RCC triode | 6.0* | 0.09 | 120 | | - | - | | 50.0 | 0.70 | | | | B4 | 1 | 1927 |
| General-purpose triode | 6.0* | 0.10 | | | - | - | | 24.0 | 1.50 | | | | B4 | 1 | 1928 |
SP610/G | General-purpose triode | 6.0* | 0.10 | | | - | - | | 7.5 | 2.50 | | | | B4 | 1 | 1928 |
| Output triode | 6.0* | 0.10 | 150 | | - | - | | 3.2 | 2.50 | | | | B4 | 1 | 1928 |
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Rectifiers | Type | Class | Cathode | Va | DC Ia | PIV | DC Vo | Base | Year | | | Type | Volts | Amps | Max RMS | mA | Volts | Volts | Type | Ref | Year |
Cosmos |
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless |
| HW | DH | 4.0 | 1.00 | 250 | 30 | | | B4 | 4 | 1927 |
| FW | DH | 4.0 | 2.00 | 350 | 60 | | | B4 | 5 | 1927 |
SP43/U | HW | DH | 4.0 | 2.00 | 350 | 75 | | | B4 | 5 | 1928 |
SP45/U | HW | DH | 4.0 | | | 30 | | | B4 | 4 | 1928 |
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