3CX300A
General
Modulator triode for serial plate modulation circuits and electronic voltage stabilizers.
Envelope: metal-ceramic.
Cooling: forced air (34 m3 per hour).
Mass 200 g.
Lead diagram
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General characteristics
| Filament voltage, Volt | 6.3 |
| Anode voltage, Volt | 600 |
| Grid voltage, Volt | 30 |
| Filament (heater) current, A | 2.45 to 2.85 |
| Plate current, mA | no less than 500 |
| Reverse grid current, mkA | no more than 30 |
| Grid voltage, V | -40 to -30 |
| Grid cut-off voltage, V | no more than-400 |
| Mutual conductance, mA/V | 14 to 26 |
| MU (gain coefficient) | no less than 6 |
| Warm-up time | 1.5 min |
| Inter electrode capacitance, pF: | |
| input | no more than 25 |
| output | no more than 1 |
| transfer | no more than 10 |
| Operation time, h | more than 1000 |
Limited operating values
| Filament voltage, V | 6 to 6.6 |
| Peak plate voltage, V | 2200 |
| Peak cathode current, mA | 500 |
| Average cathode current, mA | 250 |
| Grid voltage, V | -400 |
| Cathode pulse current, A | 34 |
| Anode dissipation, W | 300 |
| Grid dissipation, W | 1 |
| Plate-grid curves | Plate curves |
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