[SBE] Symetrix 528E switch help

[Henry M. Seiden]

No problem, Bob. Good luck with it.

Henry
On Jul 13, 2009, at 16:57 , Bob Stroupe wrote:


> Sorry for the delayed response, Henry.

>

> We are getting our Nichicon caps from Mouser and have a Sencore Z  

> meter that measures ESR.  We are very aware of the issues that  

> shorten the cap life.

>

> Thanks!

>

> Bob Stroupe

>

>

>

>

> -----Original Message-----

> From: "Henry M. Seiden"

> Sent: Jul 9, 2009 5:17 PM

> To: sbe member discussion mail list

> Subject: Re: [SBE] Symetrix 528E switch help

>

> Bob,

>

> What brands and specs of Caps are you using? Try long life caps from  

> Nichicon (preferred pricing at Digikey, www.digikey.com). And get a  

> proper meter to check ESR with. You may have a situation where a  

> long life or high heat spec on the part may improve the results of  

> your capendectomies.

>

> House/generic brands don't last, even some brands used by OEM's. Or  

> you can get a bigger fan...

> ;-)

>

>

> Henry

> On Jul 9, 2009, at 15:35 , Bob Stroupe wrote:

>

>> Ed:

>>

>> I have about 40 528E's in my studio complex and some have been  

>> mounted so that they got pretty warm.  We have successfully cleaned  

>> any switches but have had major problems with the electrolytic  

>> capacitors after a number of years.  Heat doesn't help those and  

>> have done and continue to do "capectomies" as needed by replacing  

>> all the caps in the unit (including the surface mount coupling caps).

>>

>> Good luck,

>>

>> Bob Stroupe

>>

>> -----Original Message-----

>> From: Bo

>> Sent: Jul 9, 2009 2:41 PM

>> To: 'sbe member discussion mail list' , radio-tech at broadcast.net

>> Subject: Re: [SBE] Symetrix 528E switch help

>>

>> Personally I’ve never had anything from Symetrix that works as  

>> promised except their 421 and 422 AGC units.  I much prefer  

>> Behringer or ART tube preamp/processors.  They offer a warm, but  

>> true sound that most made for TV oriented gear can’t match.

>>

>> But honestly, I don’t know of any equipment that will last for long  

>> above 90 degrees unless it is built to military specs.

>>

>> Good Luck,

>> Bo Bratcher

>> Video Engineer - MetroTV

>> Louisville Metro Government

>>

>>

>>

>> From: sbe-bounces at sbe.org [mailto:sbe-bounces at sbe.org] On Behalf Of  

>> Edwin Bukont

>> Sent: Thursday, July 09, 2009 10:30 AM

>> To: sbe; radio-tech at broadcast.net

>> Subject: [SBE] Symetrix 528E switch help

>>

>> Please reply off list if possible as I do not seem to be getting  

>> the radio-tech list reflector

>>

>> I have five Sym 528E mic processors all with the same issue.

>>

>> Units were mounted one atop the other is a wooden rack in a studio  

>> with no HVAC.  The room itself was probably 95-deg and the units  

>> were literally tooo hot to touch.

>>

>> All the units exhibit the same issue.  Audio does not flow reliably  

>> through the unit.  The problem is the blasted plastic shadow (might  

>> be other manufactuer) alternate action push button switches.  They  

>> look like shadow anyway. Excersizing them does seem to help, but  

>> the audio remains intermittent, operating best if the switch is  

>> held firmly in.

>>

>> I think the high heat might have corrupted the conductive lubricant  

>> that I understand is contained within the switches.  Is anyone  

>> familiar with a lubricant that can be used to restore proper  

>> contact operation of the switches?

>>

>> OR..is this a familiar problem that necessitates component  

>> replacement?

>>

>> These units are only 6 yrs old, have seen very little use.  Sym  

>> wants $100-240 per unit plus shipping for repair.  I can buy an 8- 

>> channel preamp for less than that.

>>

>> Thanks

>>

>> Edwin Bukont CSRE, DRB, CBNT

>> V- 240.417.2475; F- 240.368.1265

>>

>>

>>

>>

>>

>>

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> -- 

> Henry M. Seiden

> henry<at>techworkspro<dot>com

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