Tubes Asylum Questions about tubes and gear that glows. FAQ

---

[ Follow Ups ] Thread: [ Display  All  Email ] [ Tubes Asylum ]

---

[ Alert Moderator ] [ Edit ] [ Delete ]

---

Know a quiet preamp?

12.72.192.180

Posted by JohnM on June 4, 2000 at 21:40:26

I have a conrad-johnson PV-12 preamp. I love the sound of it, with one exception -- tube whistling, noise, microphonics. I'm currently using relatively new Ei (Yugoslavian) 12au7's. I've tried everything from putting new tubes in (Ei only though) to putting cones under the pre-amp. Pretty quiet for ten or fifteen minutes, then I can hear the whistle from one channel or the other from 12 feet away.

I would like to solve this problem, but am not sure what to do. I could try new tubes (suggestions?) or a Variac to reduce the voltage in my home from 121.5 to around 116 (someone mentioned that this might help).

Or, I could sell the PV-12 and buy another, quieter tube pre-amp. Suggestions and opinions on the Audible Illusions 3A, CAT Ultimate, or others are appreciated. Thanks.

John

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

Sonic Craft

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]

---

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

---