[sdiy] Power supply spike

[harrybissell at copper.net]

If you get that large of a spike you might want to
soft start the power supplies. You add resistors in series
with the DC rails... then wait like one second for the voltage
to rise. Short the resistors out with relays. This might remove
all the audible thump during turn-on. As you have relays there
anyway... disable the audio output at the same time (for free
with an extra contact...)

H^) harry


>
>
>
>---- Original Message ----
>From: louis at dompselaar.org
>To: synth-diy at dropmix.xs4all.nl
>Subject: RE: [sdiy] Power supply spike
>Date: Fri, 23 Feb 2007 11:14:45 +0100
>
>>The power supply in my modular produces a large spike on the primary
>side
>>when I switch it on so I need to have my monitor speakers switched
>off
>>before I switch the modular on or off otherwise it results in a very
>loud
>>plop.
>>
>>I've seen a lot of mains filters that filter incoming noise, but
>what do I
>>do to keep these spikes from going out?
>>
>>Louis