Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

---

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Tweakers' Asylum ]

---

[ Alert Moderator ]

---

High-bandwidth Decoupling Caps?

Posted by spindrifter (A) on June 9, 2007 at 20:24:29

Hi fellow inmates

Soon I'll be swapping/upgrading caps in a SS MC phono stage and have resolved most technical issues already.

One aspect, though, has drawn mixed opinions from experienced circuit designers, viz, adjacent decouplers to high-bandwidth, high-gain op-amps. I'm aware of the need to minimize inductance in these caps and the logical, technically-astute option is stacked polyester (Epcos 0.1uF 250V at the ready).

However, I've read that some DIYers are pleasantly gob-smacked by the use of Black Gate's in "L cancelling - super e cap" decoupler format. I also have some BG NX 0.1uF at the ready.

One circuit designer is absolutely resolute in his opposition to BGs in this situation, as there "will always be some small level of residual inductance and one cannot consider electrolytic decouplers for high-bandwidth op-amps". Meaning oscillation or worse I wonder?

So who's compared stacked polyester and Black Gate as decouplers in this situation? Any clear sonic evidence to support one over the other?

spindrifter

P.S.: Please don't bother suggesting ceramic or other types. Thanks.

This post is made possible by the generous support of people like you and our sponsors:

Parts Connexion

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2025, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---