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 | |
Loewe |
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless |
| Double RF bi-grid | 4.0* | 0.165 | 90 90 | 1.0 2.2 | 10-30 10-30 | 0.3 0.6 | | 476.0 28.0 | 0.30 0.60 | | | | 6-pin | 179 | 1927 |
2HMD | Mixer tetrode Oscillator tetrode | 4.0 | 1.50 | 200 200 | 4.0 4.0 | 100 100 | 5.0 5.0 | | 400.0 400.0 | 1.20 1.20 | | | | 4-pin +2st | 178 | |
2NF | Triode Triode | 4.0 | 0.60 | 135 135 | 15.0 | - | - | | 660.0 2.4 | 0.20 2.00 | | | | 6-pin+cc | | |
| Detector triode AF triode Output triode | 4.0* | 0.35 | 135 135 135 | 7.0 | - | - | 7.5 | 290.0 290.0 7.0 | 0.20 0.20 1.20 | | 0.4 | | 6-pin | 181 | 1927 |
3NFB = 3NF Bat 3NF Net (for DC) | Detector triode AF triode Output triode | 4.0* | 0.125 | 90-200 90-200 90-200 | 8-10 | - | - | | 290.0 290.0 3.8 | 0.20 0.20 1.20 | | | | 6-pin+cc | 175 | |
3NFK | Detector triode AF triode Output triode | 4.0† | 1.20 | 300 300 300 | 2.0 0.3 35.0 | - | - | | 290.0 290.0 1.0 | 0.20 0.20 3.50 | 12.0 | 2.0 | | 7-pin+cc | 176 | |
3NFL | Detector triode AF triode Output triode | 4.0† | 1.20 | 300 300 300 | 2.0 0.3 35.0 | - | - | | 48.0 290.0 1.0 | 1.20 0.20 3.50 | 12.0 | 2.0 | | 9-pin+cc | 177 | |
3NFW | Detector triode AF triode Output triode | 4.0† | 1.00 | 200 200 200 | 2.0 0.2 20.0 | - | - | | 290.0 290.0 1.5 | 0.20 0.20 3.00 | 1.0 | 0.8 | | 7-pin+cc | 176 | |
AR23 | Triode | 3.5* | 0.50 | | | - | - | | | | | | | B4 | 1 | |
HF29, HF30 | Triode Triode | 4.0* | 0.15 | | | - | - | | | | | | | 6-pin | 180 | 1929 |
HF30 | Triode Triode | 4.0* | 0.125 | 90-200 90-200 | 2-3 | - | - | | 12.0 12.0 | 1.30 1.30 | | | | 6-pin | 180 | |
LA74 | Triode | 3.0* | 0.06 | 50-100 | | - | - | | | | | | | B4 | 1 | |
|
LA75 | General-purpose triode | 2.0* | 0.17 | | | - | - | | | | | | | B4 | 1 | |
LA77 | Bi-grid | 1.3* | 0.13 | 60-200 | | | | | | | | | | B4 | | |
LA101 | Triode | 3.8-4.0* | | 60-120 | | - | - | | 7.0 | 0.90 | | | | B4 | 1 | 1926 |
MO44 | Mixer tetrode Oscillator tetrode | 35.0 | 0.18 | 200 200 | 4.0 4.0 | 70.0 70.0 | 5.0 5.0 | | 400.0 400.0 | 1.20 0.20 | | | | 7-pin +tc | 169 | |
RNF7 = 3NF (British made) | Detector triode AF triode Output triode | 4.0* | 0.34 | 90-150 | | - | - | | | | | | | 6-pin | 181 | 1927 |
WG33 | Triode Triode Output tetrode | 50.0 | 0.18 | 90-250 90-250 90-250 | 15.0 | 75 | 2.0 | 10.0 | 24.0 Ω 65.0 | 1.20 Ω 1.50 | | 1.0 | | 8pin +cc +2sc | 170 | |
WG34 | Tetrode detector Output pentode | 50.0 | 0.18 | 90-250 90-250 | 0.35 30.0 | 30 200 | | 12.0 | 2M 45.0 | 1.00 4.50 | 9.0 | 2.0 | | 12-pin | 171 | |
WG35 | VM RF tetrode Diode & output pentode | 63.0 | 0.18 | 90-250 90-250 | 0.35 50.0 | 40 200 | 9.0 | 18.0 | 2M 25.0 | 1.00 4.00 | | 3.0 | | 12-pin +tc | 172 | |
WG36 | VM RF pentode mixer Triode oscillator VM RF pentode | 65.0 | 0.18 | 90-250 90-250 90-250 | 3.0 5.0 4.0 | 100 100 | 8.0 1.7 | | 500.0 3.0 800.0 | 0.80 3.30 2.50 | | | | 12-pin +tc | 173 | |
WG37 | VM RF pentode Tetrode detector Output pentode | 75.0 | 0.18 | 200 200 200 | 4.0 0.35 35.0 | 100 40 200 | 1.7 0.08 10.0 | | 750.0 2M 45.0 | | 9.0 | | | 12-pin +tc | 174 | |
† The output triode of these three valves is directly heated. The other two triodes are indirectly heated.