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RE: Hash Filter Model

Go for it! My objective was to block noisy crud, regardless of source, from sneaking into the reservoir capacitor. There is always room for variations on a theme.

FWIW, I'd still like to see a simulation with a LC reservoir section located after the "hash" filter. Superior designs, like the "Deuce", some McIntosh models, and some Marantz models, include the LC reservoir section following the doubler stack. The choke is not particularly large valued. When big caps., ala McShane, are used at the I/P of a PSU filter, the ripple waveform is highly "triangular". Applying Fourier's Theorem to that "sharp" waveform led me to call for "hash" filtration immediately following the I/P capacitance. Energy well up into RF "territory" is present that can get past the principal choke, via its real world winding capacitance. Kill the garbage before it gets to the "back door".

Eli D.


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