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RE: What to do with 490V???

You can use a 555 timer circuit with a relay to delay the filament voltage to the rectifier tube to ensure the rest of the tubes are ready to conduct when the B+ comes up. I have used this approach and it works well for me.


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  • RE: What to do with 490V??? - JKT 11:54:08 11/23/15 (0)
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