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5734 mechano-electronic transducer (triode)
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This valve measures 20x7mm overall and has 4 leads |
This valve works by the angular displacement of the anode rod causing a
change in distance between the grid and anode, with the resultant change in anode current. The part of
the anode shaft inside the valve body has a minimum free cantilever resonance of 12kHz, and thus the
valve can measure vibration up to that figure.
| Heater voltage | 6.3V |
| Heater current | 150mA |
| Max anode voltage | 300V |
| Max anode current | 5mA |
| Max anode dissipation | 400mW |
| Max heater cathode voltage | ±90V |
| Typical conditions |
| Amplification factor (1) | 20 |
| Anode resistance (1) | 72k ohms |
| Transconductance (1) | 275 micromhos |
| Anode current (1) | 1.5mA |
| Load resistance | 75k ohms |
| Deflection sensitivity (2) | 40V/degree; 2300V/radian |
| Moment of intertia of anode (3) | 3.4 milligram/cm2 |
| Rotational compliance of diaphragm (3) | 0.0013x10-3 radian/dyne cm; 0.075 degree/gram cm |
- For anode shaft in undeflected position
- Average change in voltage across 75k ohm anode load resistor when the anode shaft is deflected
from -0.5 to +0.5 degree. The plane of deflection of the anode shaft must coincide with the plane
through terminal no.5 and the axis of the valve.
- Based on external anode-shaft length of 1/8" and the centre of the diaphragm as pivot.
| Lead | Function |
| 4 | Heater |
| 5 | Grid |
| 6 | Heater |
| 7 | Cathode + internal shield |
| Body | Anode |
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