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RE: New project, voltage checks good, blows fuse after 45 minutes and power transformer hellaciously hot and odd smell

A 58mA RMS rated secondary seems low for 50mA DC, CT, C-input tube rectified power supply. For 50mA DC draw I'd expect to see 70mA RMS, or greater.

The JE Labs design quoted would likely have 65-70mA RMS on the B+ secondary, which exceeds the 58mA RMS rating.

I don't like to run transformers near their maximum ratings; I'd be more comfortable with a secondary rated for > =80mA RMS. I also like to de-rate the power transformer's VAC by 50% (or more) for cooler running and perhaps lower noise and longer life.


"Confusion of goals and perfection of means seems to characterise our age." Albert Einstein


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