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RE: Small IDHT tube cathode bypassing

Posted by drlowmu on July 7, 2015 at 19:05:00:
" but with a competent design it should be so minimal that the difference between one type of capacitor and another should be inaudible."

Sorry, WRONG, wildly wrong, as often you are. Oh well, at least you are consistent.

1994, Sound practices, Marzio and Jelasi authored :

" When constructing equipment capable of attaining high peaks of musicality, the quality of the passive components assumes critical importance. This is particularly true for capacitors. Note that in the list of components, electrolytic capacitors are not recommended, not even as power supply filters. We bypassed the high value capacitors (with exception of Cl which is placed in a non-critical position) with others of small capacity in silvered mica and/or paper and oil. This practice is common among extremist experimenters who know how much the quality of these components can influence the final result ".

Marzio and Jelasi used THREE carefully-selected capacitors in 1994 on their driver and finals stages' Rks, as shown in their schematic and parts list.

Jeff Medwin