Jupiter Copper Foil, Paper & Wax Cap Versus Jensen Cap 0.10uF 630Vdc Copper Foil Ceramic

Has anyone tried Jupiter Copper Foils bypassed with a V-cap CuTF? Just curious if a .01uF V-cap would benefit a Jupiter CF with its resolving and leading edge detail or will it detract from the Jupiter's already beautiful organics?

It really doesn't seem to work like that. Each cap seems to have a different 'speed' based on its value and type of construction. As a result, a smaller cap is usually 'faster' (less dielectric absorption, lower series resistance) than a larger one so what happens is you smear the signal when two caps are placed in parallel (this applies to coupling caps, not power supply bypass). You are far better off just giving it your best shot.

It is for this reason that we designed our gear to only use smaller value caps.

The bypass caps are still $100 each and I am wondering whether to just go the whole hog and purchase the Duelund Capacitor 0.1uF 630Vdc CAST-PIO-Cu (Sn).

How close would the Jensen plus Duelund combination come to sounding as good as the Duelund Capacitor 0.1uF 630Vdc CAST-PIO-Cu (Sn)? I think this is where my final decision lies.

Again, keep in mind that if used as a coupling cap, the bias on the power tubes may be affected if either cap develops an electrical leakage. The result could be shortened power tube life, but it could also result in a damaged power transformer.

@marish200   What you experienced is why we don't use paper and oil coupling capacitors in our products. They sound great but we've seen a good number of paper and oil caps develop a slight amount of electrical leakage (which is to say they can develop enough resistance that they don't entirely block all the DC that they are supposed to), which can mess with the bias on the output section- and cause the symptom you describe.

A capacitor that can do the same job of musical delivery is the copper foil V-Cap Teflon. No electrical leakage over time- very reliable.