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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 |
| General-purpose triode | 100/250 | 0.024 | 250 | 4.0 | - | - | 6.0 | 8.8 | 2.50 | | | | B5 C7 | 1 5 | 1932 1934 |
B.2 | Double diode | 100/250 | 0.024 | 200 | 15.0 | - | - | | | | | | | C7 | 4 | 1934 |
BA1 | Single diode triode | 150/250 | 0.024 | 200 | 2.0 | - | - | 1.0 | 45.0 | 2.00 | | | | C7 | 10 | 1933 |
BA5 | Single diode triode | 150.0 | 0.024 | 200 | 5.0 | - | - | 6.0 | 10.0 | 2.00 | | | | C7 | 10 | 1933 |
D.130 | High-μ triode | 100/250 | 0.024 | 250 | 2.0 | - | - | 1.0 | 40.0 | 3.50 | | | | B5 C7 | 1 5 | 1933 1933 |
G.5 | Heptode FC | 100/250 | 0.024 | mix250 osc140 | 3.5 3.0 | 75 | 4.5 | 1.0 | 1.5M | 0.6⅄ | | | | C7 | 1 | 1934 |
H.3 | RF pentode | 100/250 | 0.024 | 250 | 3.5 | 100 | 1.5 | | 1.5M | 3.50 | | | | C7 | 3 | 1934 |
K.2050 | Output triode | 100/250 | 0.024 | 300 | 40.0 | - | - | 40.0 | 1.0 | 5.00 | 1.8 | 3.5 | | B5 | 1 | 1934 |
| Output triode | 100/250 | 0.024 | 220 | 50.0 | - | - | 50.0 | 500Ω | 6.00 | 1.2 | 4.0 | | B5 | 1 | 1933 |
L.1525 | Output triode | 100/250 | 0.024 | 300 | 20.0 | - | - | 20.0 | 1850Ω | 3.00 | 5.0 | 0.90 | | B5 | 1 | 1932 |
M.43 | Output pentode | 100/250 | 0.037 | 250 | 40.0 | 200 | 8.0 | 24.0 | 35.0 | 3.2 | 6.0 | 3.5 | | C7 | 6 | 1934 |
M.44 | Output pentode | 100/250 | 0.037 | 250 | 40.0 | 200 | 5.0 | 7.5 | | | 6.0 | 9.0 | | C7 | 6 | 1936 |
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MS.18 | VM RF tetrode | 100/250 | 0.024 | 250 | 5.0 | 100 | 3.0 | 2/18 | 500.0 | 3.00 | | | | B5+tc C7 | 2 2 | 1933 1933 |
MS.70 | VM RF tetrode | 100/250 | 0.024 | 250 | 4.0 | 100 | 2.5 | 2/70 | 500.0 | 3.00 | | | | B5+tc C7 | 2 2 | 1933 1933 |
Pt.3 Pt4 | Multigrid output pentode | 100/250 | 0.024 | 250 | 20.0 | 250 | 4.0 | 24.0 | 100.0 | 3.5 | 15.0 | 1.5 | | C7 Ct8 | 6 46 | 1933 |
S.25 | RF tetrode | 100/250 | 0.224 | 250 | 4.0 | 100 | 0.4 | 2.0 | 250.0 | 3.80 | | | | B5+tc C7 | 2 2 | 1933 1933 |
S.100 | RF tetrode | 100/250 | 0.024 | 250 | 1.0 | 100 | 0.2 | 1.0 | 1M | 4.00 | | | | B5+tc C7 | 2 2 | 1933 1933 |
| Output triode | 100/250 | 0.024 | 300 | 7.0 | - | - | 7.0 | 3.7 | 3.00 | 10.0 | 0.75 | | B5 | 1 | 1932 |
V.3 | VM RF pentode | 100/250 | 0.024 | 250 | 4.0 | 100 | 1.8 | 2/40 | 1.5M | 3.00 | | | | C7 | 3 | 1934 |
W.310 | Medium-μ triode | 100/250 | 0.024 | 300 | 2.0 | - | - | 1.0 | 40.0 | 3.50 | | | | B5 | 1 | 1932 |
Rectifiers | Type | Class | Cathode | Va | DC Ia | PIV | DC Vo | Base | Year | | | Type | Volts | Amps | Max RMS | mA | Volts | Volts | Type | Ref | Year |
Ostar-Ganz |
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless |
EG50 | HW | IH | 100/250 | 0.024 | 300 | 50 | | 220 | B5 | 8 | 1932 |
EG100 | HW | IH | 100/250 | 0.024 | 300 | 120 | | 240 | B5 | 8 | 1932 |
NG40 | VD | IH | 100/150 | 0.024 | 300 | 50 | | 440 | B5 | 21 | 1932 |
NG50 | VD | IH | 100/150 | 0.024 | 300 | 50 | | | C7 | 7 | 1934 |
NG100 | VD | IH | 100/150 | 0.024 | 300 | 100 | | | C7 | 7 | 1934 |
VG45 (Diode bridge) | FW | IH | 150/250 | 0.044 | | 45 | | 260 | B4 | 33 | 1932 |
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