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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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A | B | 4.0 | 0.72 | 45-100 | | | | | 1917 | | GP. Similar to R |
| B | 4.0 | 0.72 | 45-100 | | | | | 1917 | B4 | GP. Similar to R. |
| B | 5.0 | 0.70 | 40-120 | | 37.0 | 0.27 | 10.0 | 1922 | B4 | GP. Similar to R5V |
| D | 1.8 | 0.35 | 20-80 | 0-3 | 27.0 | 0.28 | 7.5 | 1924 | B4 | General purpose |
| D | 6.0 | 0.25 | 40-120 | 0-4.5 | 6.0 | 1.10 | 6.5 | 1923 | B4 | Output |
B4H | D | 6.0 | 0.25 | 40-120 | | 28.0 | 0.70 | 20.0 | 1924 | B4 | General purpose |
| D | 2.8 | 0.06 | 20-80 | 0-4.5 | 17.0 | 0.41 | 7.0 | 1923 | B4 | General purpose |
| D | 2.8 | 0.12 | 40-120 | 0-4.5 | 12.0 | 0.67 | 8.0 | 1924 | B4 | Output |
B7 | D | 6.0 | 0.06 | 40-120 | 0-4.5 | 12.0 | 0.67 | 8.0 | 1924 | B4 | AF amp./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 | |
BTH |
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless |
B5H | RF or RCC triode | 2.8* | 0.06 | 120 | | - | - | | 55.0 | 0.33 | | | | B4 | 1 | 1926 |
B8 | RCC triode | 2.8* | 0.12 | 150 | | - | - | | 180.0 | 0.28 | | | | B4 | 1 | 1927 |
| Output triode | 6.0* | 0.50 | 200 | | - | - | 36.0 | 2.5 | 1.40 | | | | B4 | 1 | 1927 |
B12 | Output triode | 7.5* | 1.25 | 425 | 55.0 | - | - | 80.0 | 2.9 | 0.98 | | 3.1 | | B4 | 1 | 1927 |
B21 | RF or detector triode | 2.0* | 0.10 | 150 | | - | - | | 32.0 | 0.50 | | | | B4 | 1 | 1927 |
B22 | General-purpose triode | 2.0* | 0.10 | 100 | | - | - | | 14.0 | 0.54 | | | | B4 | 1 | 1927 |
B23 | Output triode | 2.0* | 0.20 | 100 | | - | - | | 8.0 | 0.57 | | | | B4 | 1 | 1927 |
B210H | RF or RCC triode | 2.0* | 0.10 | 150 | | - | - | | 250.0 | 0.14 | | | | B4 | 1 | 1927 |
B210L | Detector triode | 2.0* | 0.10 | 120 | | - | - | | 14.0 | 0.93 | | | | B4 | 1 | 1927 |
B215P | Output triode | 2.0* | 0.15 | 120 | | - | - | | 7.0 | 1.00 | | | | B4 | 1 | 1927 |
BG3 | Triode (no data) | | | | | - | - | | | | | | | B4 | 1 | |
BS215 | RF tetrode | 2.0* | 0.15 | 150 | | 75 | | | 230.0 | 0.55 | | | | B4+tt | 2 | 1929 |
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BTS215 | Detector triode & AF triode (Two-Stage) | 2.0* | 0.15 | 80-120 80-120 | | - | - | 4.5-9 | 100.0 7.0 | 0.27 0.90 | | | | B4+2st | 24 | 1928 |
GP210 | General-purpose triode | 2.0* | 0.10 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
GP407 | General-purpose triode | 4.0* | 0.07 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
| General-purpose triode | 6.0* | 0.07 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
HF210 | RF triode | 2.0* | 0.10 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
HF407 | RF triode | 4.0* | 0.07 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
HF607 | RF triode | 6.0* | 0.07 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
LF210 | AF triode | 2.0* | 0.10 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
| AF triode | 4.0* | 0.07 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
LF607 | AF triode | 6.0* | 0.07 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
P227 | Output triode | 2.0* | 0.27 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
| Output triode | 4.0* | 0.15 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
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P615 | Output triode | 6.0* | 0.15 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
PX650 | Output triode | 6.0* | 0.50 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
RC210 | RCC triode | 2.0* | 0.10 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
RC407 | RCC triode | 4.0* | 0.07 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
RC607 | RCC triode | 6.0* | 0.07 | ★ | | - | - | | | | | | | B4 | 1 | 1928 |
SG207 | RF tetrode | 2.0* | 0.075 | 120 | 1.5 | 80 | 1.2 | 1.0 | | 0.40 | | | | B4+tt | 2 | 1928 |
Screen Grid | RF tetrode (no data) | 1.0* | 0.10 | | | | | | | | | | | B4+tt | 2 | 1927 |
★ See Mazda
Rectifiers | Type | Class | Cathode | Va | DC Ia | PIV | DC Vo | Base | Year | | | Type | Volts | Amps | Max RMS | mA | Volts | Volts | Type | Ref | Year |
BTH |
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless |
RH1 | HW | DH | 7.5 | 1.25 | 550 | 65 | | | B4 | 4 | 1927 |
Thyratrons | Type | Heater | Anode | Control | fmax | Gas | Base | Year | | Volts | Amps | Pk Volts | Pk mA | Ratio | KHz | | Type | Ref | Year |
BTH |
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless |
BT1 | 2.0 | 5.00 | 1000 | 900 | | | Mercury | | | |
BT5 = CV1147 | 5.0 | 4.50 | 1000 | 12.5A | | | Mercury | USM4b+tc | 25 | |
BT5A | 5.0 | 4.50 | 1000 | 12.5A | | | Mercury | USM4b+tc | 25 | |
BT8 | 2.0 | 2.50 | 500 | 275 | | | Mercury | | | |
BT19 = CV1144 | 2.5 | 5.00 | 1000 | 2A | | | Mercury | B4+tc | 35 | |
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