Making certain assumptions about the regulation and line input rating of the transformer, this puts you at nearly 1200V peak at nominal line with no load. The fact that the original circuit used 'very heavy' filter chokes means the transmitter required low ripple, maybe 0.1%. Is this power supply keyed on through the mic? The HV capacitors are going to be a headache, minimizing capacitance means you have to pay attention to regulator bandwidth. A straightforward series regulator using stacked transistors, with the transistor stack shunted by a power resistor stack to supply a sizable portion of the loading, would be one simple way to do it. You would also want foldback current limiting, OV protection for the output, and a turn-on stabilization time of 500ms or less if it is keyed on.
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16 years ago