CV4009 reliable variable-µ HF pentode
 |
This valve measures 59x17mm overall and has a B7G base. |
This valve was developed from the CV454.
| Heater voltage | 6.3V |
| Heater current | 300mA |
| Max heater-cathode voltage | +/- 150V |
| Max operating anode voltage | 330V |
| Max anode voltage (Ia=0) | 500V |
| Max anode dissipation | 3.3W |
| Max operating screen voltage | 135V |
| Max screen voltage (Ig2=0) | 330V |
| Max screen dissipation | 700mW |
| Mutual conductance (Va=250, Vg2=100, Ia=11mA, Ig2=4.2mA) |
4.4mA/V |
| Max bulb temperature | 165C |
| Max shock (short duration) | 500g |
| Max acceleration (continuous operation) | 2.5g |
| Inner amplification factor | 24 |
| Mutual conductance (g1=-20V) | 40µA/V |
| Anode impedance | 1M ohm |
| Capacitances (measured without screening can) | |
| Cin nom | 5.5pF |
| Cout nom | 5.0pF |
| Ca, g1 max | 0.0035pF |
| Pin | Function |
| 1 | Control grid |
| 2 | Suppressor grid |
| 3 | Heater |
| 4 | Heater |
| 5 | Anode |
| 6 | Screen grid |
| 7 | Cathode |
The Chelmer example above is
taller than the Brimar specimen below which measures 54x17mm.
