[Asterisk-Dev] notch / high pass filter addition to zaptel
steveu at coppice.org
Wed Jun 29 07:07:19 MST 2005
Andrew Kohlsmith wrote:
>On Tuesday 28 June 2005 14:59, Kelly McDonald wrote:
>>The only issue I have left is a ~60hz hum that seems to be coming from
>>the card itself (bad ps bypassing is my guess)
>If you've got 60Hz anywhere in your PC replace that power supply. I don't
>think I've ever run across 60Hz hum in any kind of modern switchmode power
>supply. It just doesn't happen.
It might not be a power supply issue. He might have a grounding problem
(i.e. he might have something grounded that shouldn't be). However, a
notch filter is definitely not what he needs.
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