![]() |
Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
Register / Login
|
In Reply to: Minimax CD Takes On The Meridian G08 posted by Luminator on June 29, 2006 at 12:22:51:
You observed:"While CDs were playing, a co-worker kept tapping his fingers on the Minimax CD's chassis. At least with the tubes we were using, there were no probelms with microphonics."
All tubes suffer from microphonics at some level, and you may not be able to detect severe thumps and bumps with tubes that are still degrading the resolution through their internal acoustic responses and resonances.
Try this when you have access to a tubed unit again. Wrap the tube envelope tightly with Teflon thread-seal tape at the place where an internal mica spacer is touching the glass. Also wrap the tube pins with Teflon tape rolled up into a string, one at a time, at the places where the pins come out of the glass or base. You should hear greater resolution. Whether you like the remaining tonal character is a matter of taste.
Warning to the enthusiastic: do not cover too much of the glass with Teflon tape, or the tube will overheat. A single belt of tape with about five turns should be sufficient.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Nice comparison, thanks. One comment... - Al Sekela 15:31:00 06/29/06 (5)
- Microphonics - Luminator 15:54:20 06/29/06 (4)
- Simply twist the Teflon tape to make it into a string. (nt) - Al Sekela 10:47:00 06/30/06 (0)
- Re: Microphonics - RW34 20:15:26 06/29/06 (2)
- Disagree. - Al Sekela 10:46:16 06/30/06 (1)
- narrow pov - RW34 23:15:04 06/30/06 (0)