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Questions about tubes and gear that glows. FAQ

RE: I wanted to know what others using 5r4 have

That net 20 μF. is in line with what some 5R4 data sheets show. Your 12 μF. should be just fine at the voltages found in most tubed audio circuitry.

You can make quite certain of safety by installing a CL-130 inrush current limiting thermistor between the rectifier and the PSU filter.

Eli D.

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