[sdiy] power switch bounce?

[jeff brown]

Tony,

I'm interested as well. I have 3 PowerOne PSU's in my monster modular, and 2 
of them do the exact same thing (intermittently), and I'm allready using the 
Ken Stone power delays.

Jeff

----- Original Message ----- 
From: "mark verbos" <mverbos at earthlink.net>
To: <oakleylist at btinternet.com>
Cc: "Synth DIY" <synth-diy at dropmix.xs4all.nl>
Sent: Monday, March 08, 2010 2:45 PM
Subject: Re: [sdiy] power switch bounce?


> Tony, I'd be willing to mod the supplies. Could you send me the  details 
> of what you did to them?
>
> Mark
>
>
>
> On Mar 8, 2010, at 2:48 AM, Oakley Sound wrote:
>
>> This is a known problem with Power One supplies - and their clones.  It 
>> is related to the current foldback limiting. Diodes on the rails  didn't 
>> seem to have much affect.
>>
>> I asked Power One about this - one chap got back to me and got all 
>> shirty and told me that there was nothing I could do but buy a  bigger 
>> supply and that no one would give me the schematic so why did  I bother 
>> asking. The amusing thing was that only minutes earlier  someone else in 
>> the same company replied with lots of useful  information and a 
>> schematic.
>>
>> Ultimately, the upshot of this was that I modded several Power Ones  for 
>> standard current limit and removed the foldback limiting  completely. 
>> Whilst not the most acceptable solution it was a  workable one given the 
>> relatively large heatsinks and low currents  that these supplies were 
>> capable of.
>>
>> If modding the PSU is not acceptable I'd second going for one of  Ken's 
>> sequenced power up modules.
>>
>> Also, keep any raw power supply decoupling on each module down to  less 
>> than 3uF unless used with a series resistor.
>>
>> Tony
>>
>> www.oakleysound.com
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy