Tube DIY Asylum
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Posted by sony6060 on January 29, 2017 at 15:36:28:
Simple LC section using a 60mH choke and 44000uF capacitor results on .00 AC ripple in 9 volt bias. A 8 ohm resistor & 100uF cap at the filament is less than .001 AC ripple.
I do not have a AC ripple spec for a quiet running 26 tube, but .001 ripple is not good enough.