|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
81.246.236.6
I was browsing ebay for other stuff when I came across a couple of Roederstein EG Gold axial caps.I decided to buy them because they are the same value and physical size as the old Frako PSU caps in my K&M SP100 preamplifier (see pictures). Even the color matches :) (haha)
Please note that the pictures are from internet and my preamp doesnt have the blown cap next to the transformer!
I don't have really doubts as wether these Roe caps are suitable replacements for the original Frako caps. I am, however, a bit concerned about them being NOS, wich means they have been sitting unused on a shelf for a long time. May I use them, or should I go trough some reforming process?BTW, at 30 dollars for two caps, those were not cheap.
But then any audio-grace axial cap is expensive as well, these days...
Edits: 04/28/16Follow Ups:
I installed them today. They replace two 4700uF Frako capacitors.
I was a bit afraid, but I'm so glad I did it!
This is the best result I ever got from swapping capacitors.
Soundstage now extends way past the speakers, everything is clear and balanced, and bass is... WOW... much deeper and less boomy, inctredible!
Just changing these two caps made even more improvement than the complete recap + change of opamps I just did on my Revox CD player. It's like buying a new, better preamp...
I would not buy NOS electrolytics. As you mentioned, they have been sitting for some time. They can dry out whether being used or not. Old electrolytics do not have desirable qualities new ones dont have.
inside view of the preamp:
PSU section
I have used these with no reforming and no ill effects. Operating voltage about 80% of rated...
In the eighties these used to be pretty good sounding caps, particularly in the bass. Not sure how they rate today, probably still not too shabby.
Make sure to sand down the leads with fine grit before soldering.
I do not have the schematics of the preamp (it doesn't exist anymore I'm afraid, this is a pretty rare preamp from Korn&Macway Belgo-German brand), so I don't know how much voltage goes trough the filtering caps, but the originals being rated 50v I guess the Roederstein 63v will probably see max 50% of their rated volatge, so I should be "safe"... Thanks for your comment. I do know how to solder and replace caps, but I don't have a variac here to reform them, and as long as they don't explode and create damage, I don't think I would go so far. If it sounds bad, I'll get new caps.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: