PLAN B analog blog

is your PSU grounded to the mounting rails in your case?


--- On Thu, 7/17/08, dematteoanthony <dongchi1@hotmail.com> wrote:

> From: dematteoanthony <dongchi1@hotmail.com>
> Subject: [PLAN_B_analog_blog] model 15 hum
> To: PLAN_B_analog_blog@yahoogroups.com
> Date: Thursday, July 17, 2008, 4:32 PM
> i purchased a model 15 used recently.
> 
> i am experiencing what sounds like a ground hum.
> 
> any suggestions would be much appreciated.
> 
> i am using the doepfer d.i.y power supply #1 i believe, its
> the one
> with 2 busboards.
> 
>  the case is made of wood w/ metal rails.
> 
> i have unhooked all other modules and tried powering the
> module as far
> away from the power supply as possible w/ no luck.
> 
> unfortanettly this is the only analog osc i have so i cant
> tell if its
> an issue w/ the power or the module itself.
> 
> i know its not the electrical in my room as i have brought
> the system
> to other places and received the same results.
> 
> any suggestions will be greatly appreciated.
> 
> thanks, tony
> 
> 
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