[PlanetCCRMA] Re: PlanetCCRMA digest, Vol 1 #1426 - 6 msgs

[Mark Shuford]

On Fri, 23 Sep 2005 12:00:05 -0700
planetccrma-request@ccrma.Stanford.EDU wrote:

>    4. Re: Delta 1010 buzzing - update (Joe Hartley)
> 
> --__--__--
> 
> Message: 4
> Date: Fri, 23 Sep 2005 12:38:55 -0400
> From: Joe Hartley <jh@brainiac.com>
> To: planetccrma@ccrma.Stanford.EDU
> Subject: Re: [PlanetCCRMA] Delta 1010 buzzing - update
> 
> On Mon, 19 Sep 2005 18:46:50 -0400
> Joe Hartley <jh@brainiac.com> wrote:
> > A woeful thing has happened at the studio - the Delta 1010 has a
> > horrendous buzz on all 8 output channels.
> > 
> > I remembered that there was a discussion on this list a year or so
> > back about replacing capacitors, so I checked the archives, then
> > cracked the cover of the 1010's breakout panel, to find...  no
> > obvious sign of a problem.
> 
> I finally had the chance today to pull the 1010 breakout box from the
> rack and really open it up.  Turns out that under the flat black metal
> strip screwed to the top of the daughterboard is a 2200uF 25v cap with
> a bulging top and just a little brown ick on the top of it.
> 
> So on the one hand...  phew, I can fix this myself.  On the other hand
> (there's a fist - obscure Jona Lewie reference), I'm disappointed I've
> got to replace it after a relatively short period of ownership (3
> years or so).
> 
> Thanks to all on the list who helped out!
> 
> -- 
> ======================================================================
>        Joe Hartley - UNIX/network Consultant - jh@brainiac.com
> Without deviation from the norm, "progress" is not possible. - FZappa
> > 
> 
> End of PlanetCCRMA Digest
> 


I wasn't around for the 1010 buzzing issue discussion which involved
those capacitors. Was the advices to replace the caps w/ better quality
caps? Was their any suggestion of using different ratings, particularly
voltage? 

I don't know what function the caps served in the circuit... but I'm
thinking filter caps. A higher voltage rating could be a good
idea... esp. if the originals were good quality caps. If the originals
were marginal or junk then some good caps of the original values should
do it -- if the circuit design didn't de-rate those caps too much.

It's been a while since I worked hands-on w/ circuits so I'm not sure
who's making the best caps at this time.


cheers,
mark



-- 
Mark Shuford