Tubes Asylum

A critical inductance choke input filter....

76.90.100.230

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In Reply to: RE: pi filters and choke filters for tube filaments posted by lotsmorebetter1 on May 14, 2023 at 16:34:14

will insure that whatever ripple is left at the end of the filter is a sine wave. A cap input filter produces saw tooth ripple and that is very audible and hard to listen to.

For my 300b SET amps I use a LCRCL filter and the ripple is a very low and is a sine wave.

I think DC filaments get a bad rap because they are normally not done right. Many designs just have a bridge followed by a big cap. Not good!

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

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