Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

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Absolutely Correct!

Posted by Triode_Kingdom on July 8, 2015 at 19:20:57:
"There will in actuality be some non-zero signal, but with a competent design it should be so minimal that the difference between one type of capacitor and another should be inaudible."

Boutique aficionados and elitists never want to talk objectively about this concept. If the AC voltage across the bypass were actually zero, the capacitor could contribute *nothing* to the sonics of the amplifier. It would be presenting the same electrical characteristics as a perfect piece of wire for all signals. This is also true of filter caps in the power supply. The absence of AC signal voltage across them would indicate operation as perfect decoupling caps, capable of contributing nothing, regardless of internal construction or materials. The fact is, I've heard dozens of enthusiasts say over the years that they could hear little or no difference from changing coupling caps or adding filtering (when the original components were in known-good working condition). My aural experience has been similar, and has been repeatedly confirmed by observation of physical phenomena in the circuits I've worked with.