Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
In Reply to: Re: Where to get Elna Silmic caps? posted by Sampsa on March 30, 2005 at 20:09:54:
Hello Sampsa. I will try to answer your questions:
"These caps would be used for local opamp bypasses in an SS preamp, phono stage, and CDP analog output stage. The opamps are OPA627s and an LT1362 in the preamp. I'm thinking of a "Goudreau triplet," 100-200uF electolytic stacked with 0.01uF and 0.1-0.4uF SMD ceramics from V+/V- to ground, and/or Epcos B32560 uncoated stacked film caps between V+ and V-."I am not a big fan of bypassed capacitors, having found in all instances that the treble response sounds awkward. Do a search on "tank circuits" on the EE sites.
Regarding Silmic as bypass, I suggest that you use Panasonic THSA or Black Gate N in the analog output stage of your CDP; these are faster, brighter caps. It's hard to explain why, but caps that sound smooth in pure analog circuits Do sound bright in digitally-polluted circuits, and amazingly, bright sounding caps sound smooth when used as digital bypasses. I guess it has something to do with the high-frequenvy impedance of the cap.
THSA and BGN are very effective for bypassing anything digital, including the CDP analog stage, which is usually polluted with RFI.On your phono stage, I think Elna Cerafine will be a fine bypass.
Elna Silmic is not fast enough to effectively drain HF noise, when used as a bypass.
IMO Silmic is an excellent choice as the main power supply cap for "clean" analog stages.
I have no experience with Jensen 4 pole caps, sorry.
Good luck
Carlos
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Re: Where to get Elna Silmic caps? - Carlos 04/3/0518:21:43 04/3/05 (1)
- Re: Where to get Elna Silmic caps? - Sampsa 18:44:03 04/3/05 (0)