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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 |
AP235 | Bi-grid tetrode | 2.0* | 0.35 | | | | | | | | | | | B4+st | 28 | 1927 |
AP406 | Bi-grid tetrode | 4.0* | 0.06 | | | | | | | | | | | B4+st | 28 | 1927 |
AP412HF | RF or RC bi-grid tetrode | 4.0* | 0.12 | 20-100 | | 4-25 | | | 60.0 | 0.45 | | | | B4+st | 28 | 1927 |
| AF bi-grid tetrode | 4.0* | 0.12 | 20-50 | | 10-15 | | | 11.0 | 0.68 | | | | B4+st | 28 | 1927 |
| Output bi-grid tetrode | 4.0* | 0.12 | 40-100 | | 10-20 | | | 4.9 | 1.10 | | | | B4+st | 28 | 1927 |
AP412 RC | RCC bi-grid tetrode | 4.0* | 0.12 | 60 | | | | | 120.0 | 0.31 | | | | B4+st | 28 | 1927 |
AP412 SG | RF bi-grid tetrode | 4.0* | 0.12 | 30-120 | | 4-25 | | | 500.0 | 0.20 | | | | B4+st | 28 | 1927 |
AP412U | Detector bi-grid tetrode | 4.0* | 0.12 | | | | | | | | | | | B4+st | 28 | 1927 |
AP425P | Output bi-grid tetrode | 4.0* | 0.25 | 40-100 | | 10-25 | | | 2.4 | 1.24 | | | | B4+st | 28 | 1927 |
B.E. (4V) | GP bi-grid tetrode | 3.5* | 0.55 | 50-100 | | | | | | | | | | B4+st | 28 | 1927 |
B.E. (6V) | GP bi-grid tetrode | 6.0* | 0.50 | | | | | | | | | | | B4+st 5-pin | 28 | 1927 |
D.E. | GP bi-grid tetrode | 4.0* | 0.34 | | | | | | | | | | | B4+st 5-pin | 28 | 1927 |
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D.E.06 | GP bi-grid tetrode | 4.0* | 0.06 | | | | | | | | | | | B4+st 5-pin | 28 | 1927 |
D.E.4 | GP bi-grid tetrode | 4.0* | 0.56 | | | | | | | | | | | B4+st 5-pin | 28 | 1927 |
D.E.34 | GP bi-grid tetrode | 4.0* | 0.34 | | | | | | | | | | | B4+st 5-pin | 28 | 1927 |
H.F. | RF bi-grid tetrode | 2.0* | 0.34 | 20-30 | | | | | | | | | | B4+st | 28 | 1927 |
H.F. & DET | RF or RC bi-grid tetrode | 3.5* | 0.06 | 20-25 | | | | | | | | | | B4+st | 28 | 1927 |
L.F. | AF bi-grid tetrode | 2.0* | 0.34 | 20-40 | | | | | | | | | | B4+st | 28 | 1927 |
L.S.680 | Output bi-grid tetrode | 6.0* | 0.80 | 200 | | | | | 1.0 | 3.00 | | | | B4+st | 28 | 1929 |
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