CR25 Range
30kV, 30W CRT PSU with auxiliaries
| Basic Specification | The General High Voltage CR25 series provide highly regulated outputs for many of the electrodes in a high resolution shadow mask colour CRT. The dc input voltage is 38V (nominal) and the anode output voltage is adjustable between 20kV and 28kV. The output regulator circuits are designed to provide a power supply which has good static and dynamic regulation, combined with very low ripple, ensuring a display that remains stable and sharp over a wide range of brightness modulation. As well as the anode supply, rated at 30 Watts, the module generates adjustable focus G1 and G2 outputs. Current limiting circuits are fitted to protect the outputs against overloads and short circuits. All outputs are individually regulated. Ruggedised military type specifi cation available. |
| Specification Example | |
| Input voltage range | 34-42V (other voltages may be avaliable - contact factory) |
| Max. input voltage | 45V (unit may be damaged by higher input voltages) |
| Full load input current | 1.3A nominal |
| Anode Output | |
| Output voltage range | +20kV to +28kV |
| Output current | 1.3mA |
| Control of output | Internal single turn potentiometer |
| Output ripple | 4.0V peak to peak (at full load, with tube capacitance 2nf) |
| Line regulation | 0.01% |
| Load regulation | Static: 0.01% (no load to full load) |
| |
Dynamic: 0.1% |
| Temperature coefficient | 200 ppm per °C max. Better temperature coeffi cients may be specifi ed |
| Protection |
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| Focus and grid outputs | Note: The voltages are proportional to the anode voltage setting. |
| Focus output (adjustable) | 4.75kV to 6.0kV. Other voltages upon request. Ripple 0.5V peak to peak max Max. load ±10?A |
| G1 (grid) output | Fixed output, -200V Max. ripple 0.5V peak to peak. Max. load 3mA |
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