Help with sourcing part for PR99

[Cyrano]

Hi,

Anyone could help me with getting part or specs for blue dipped 68n cap, it's C4 on power supply PCB and C1 on repro PCB.  It is used in a few other places where power pulse is an issue.  Not much info in service manuał as to its type/make and I really like what it does.

Thank you
ANdrew

[traf]

You may use siver mica with better results.
Tod

[Cyrano]

I will give it a try!  68nF

Andrew

[tusk]

Hi, just taken a look at my spare power supply are you sure its a capacitor?
The part is marked 68nS which points to the part being a protection device or a ptc.

regards
Keith

[Cyrano]

Keith,

It is a cap, either monolitic or layered ceramic.  Something like that:
http://uk.farnell.com/epcos/b37986g5103j/capacitor-10nf-50v/dp/4001254

Studer had used 2 types I could spot so far, the one like that on the link and the other one which is taller and it seems to be ceramic disc encased in the same type of epoxy, you can see from the top of this cap a sandwiche structure.  No other marking than capacity and S for tol or voltage.  They are also used in FB loop on record PCB HS IEC (330pF) instead of regular plate ceramic.
 They have certain tonality like EMZ KP adding slight rounded compression to the lower freq. with open and forward full lower midrange and fatter hights.  Jumpy energetic sound with a touch of wetness in proper application.

Andrew

[ironbut]

Hey Andrew,
You might have better luck finding out the maker of that cap on the Studer group on yahoo. I seem to recall some mention of blue dipped caps and current sources or subs from the old Studer list.

http://tech.groups.yahoo.com/group/STUDER/

[Cyrano]

Thank you, I am awaiting moderator's answer.

Andrew

[Cyrano]

Hi,

Those blue epoxy dipped caps are mulilayer ceramic, Siemens patent Sibatit 50/63V CCLS.  Some kind of transistion technology between plate and mono MLCC.  Could not find more specs to share.  Epcos    B37981 looks close.

Andrew