Re: EDP Noise Problem (overheating?)

[Matthias Grob <matthias@grob.org>]

>Did you just pull out the memory bars, or did you also replace the 
>connector
>strips for the SIMM bars? And how about that issue with 4mB SIMMs that 
>have
>more than eight chips on them producing extraneous noise or even heavily,
>erm, "processed" loops? I have SIMMs with eight chips maximum on them.

more is useless

>Should I look out for other SIMMs to replace them with in order to improve
>S/N ratio?

no, either it works or it does not, if not, the noise is huge

>Stephen
>
>
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>----- Original Message -----
>From: "Tom Combs" <tcombs@sep.com>
>To: <dylan@aops-eds.com>
>Cc: <Loopers-Delight@loopers-delight.com>
>Sent: Wednesday, January 19, 2005 2:26 PM
>Subject: Re: EDP Noise Problem (overheating?)
>
>
>>  Dylan,
>>
>>  A couple of days ago I finally got around to opening my EDP to reseat
>>  the memory sticks.  This seems to work wonders.  The EDP is currently 
>on
>>  it's 3rd day of running a constant loop - no degredation that I can 
>hear.
>>
>>  If you try this, please post your results.
>>
>>  Thanks,
>>  Tom
>>
>>
>>  Dylan Deanda wrote:
>>  > Hi Tom,
>>  >
>>  > I'm in the same boat as you.  After leaving a loop muted overnight, I
>>  > come back in the morning and it's degraded to hissy garble.
>>  >
>>  > I've pondered resetting my memory sticks, though I've never gotten
>>  > around to it to test the theory.
>>  >
>>  > I look forward to a fix.
>>  >
>>  > Best regards,
>>  >
>>  > Dylan DeAnda
>>  >
>>  >
>>  > -----Original Message-----
>>  > From: Tom Combs [mailto:tcombs@sep.com]
>>  > Sent: Tuesday, January 04, 2005 1:11 PM
>>  > To: loopers-delight@loopers-delight.com
>>  > Subject: EDP Noise Problem (overheating?)
>>  >
>>  > I have an Oberheim EDP (beige panel, maximum memory) has a noise 
>problem
>>  > and I'm wondering if it may have something to do with the voltage
>>  > regulator overheating issues I read about in the archives.
>>  >
>>  > Say I record a loop and I leave the unit running for a long time (a 
>few
>>  > hours).  Eventually the loop will deteriorate, and any new overdubs I
>>  > apply at that point also come back immediately degredated.  It kind 
>of
>>  > sounds as if the D/A becomes starved for voltage.  I have noticed 
>that
>>  > my
>>  > unit gets pretty hot right around where I've read the voltage 
>regulator
>>  > lives.
>>  >
>>  > I should add that turning the unit off for 5-10 seconds fixes the
>>  > problem.
>>  >
>>  > Another possible symptom is that I notice my loops contain an 
>increased
>>  > level of hiss when compared with the input signal (I notice this
>>  > immediately after I hit record after recording a loop - it isn't due 
>to
>>  > repeated overdubs).  The amount of hiss seems to vary at random.
>>  > Sometimes it's a little noticable but tolerable - other times it's
>>  > downright distracting.  I've read that these units are supposed to be
>>  > quiet and have some of the best audio performance specs of most of 
>the
>>  > loopers that are out there.
>>  >
>>  > Thanks in advance,
>>  > Tom
>>  >
>>  >
>>
>>  --
>>  Tom Combs, Senior Engineer
>>  SEP, Inc.
>>  11611 N Meridian Street
>>  Suite 800
>>  Carmel, IN  46032
>>  (317) 843-1640
>>


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