| |||
| five-electrode tube; pentode tube; three-grid valve | |||
| three-grid tube | |||
| pentode | |||
|
Pentode : 13 phrases in 2 subjects |
| Antennas and waveguides | 7 |
| Technology | 6 |
| |||
| five-electrode tube; pentode tube; three-grid valve | |||
| three-grid tube | |||
| pentode | |||
|
Pentode : 13 phrases in 2 subjects |
| Antennas and waveguides | 7 |
| Technology | 6 |