[SBE] Symetrix 528E switch help

[Henry M. Seiden]

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
Drag'n'Drop VCF card... Just drag and drop the attached .vcf card into  
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