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#1 2010-05-18 22:00:30

Musssid
Rockford
Registered: 2010-02-11
Posts: 54

noisey Power supply mod?

Has anyone modified or heard of a mod to eliminate noise from the power supply?

I was talking to a guy who knows a thing or 2 about electronics and he recommended adding a large cap on the power supply and that would eliminate or decrease the noise on my c64

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#2 2010-05-27 23:31:22

ACrIkeD
Bomb Jack
From: Finland
Registered: 2009-06-05
Posts: 30
Website

Re: noisey Power supply mod?

He is right. Cap between power and ground can reduce high frequency noise. But for low frequency you also need LC-filter.

The SID power is not filtered well, and ground is also giving a bit of fuzz too. The power can be filtered by 1 to 10uF filter cap between power and ground. There are special caps made for this.
Mouser.com
Digikey.com


D-E03 - ( Deep Electronic 03 ) Experimental Electronic Engineering. Digital audio sounds like a grand old woman falling down the stairs.

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#3 2010-09-16 00:39:46

electriclifeform
Bub
From: United Kingdom (London)
Registered: 2006-08-03
Posts: 158
Website

Re: noisey Power supply mod?

sorry to bring up an old thread but do you bridge the power and ground with a 10uf cap or wire it differently?


www.handbakedarcade.co.uk  <-- arcade :-)

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#4 2010-09-16 20:27:34

Spazi
Rockford
From: The Faroe Islands
Registered: 2009-10-12
Posts: 53

Re: noisey Power supply mod?

Found this one the net

http://readymaderc.com/store/index.php? … cts_id=138

http://en.wikipedia.org/wiki/LC_circuit

this is a basic image of the diagram

http://www.pentodepress.com/home/amplifier-calculators/LC-ripple-filter/LC-lowpass.gif

I would test it if I could. But I dare not to mod my PSU since it's the only one I got sad

Last edited by Spazi (2010-09-16 20:28:49)

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#5 2010-09-27 22:35:30

electriclifeform
Bub
From: United Kingdom (London)
Registered: 2006-08-03
Posts: 158
Website

Re: noisey Power supply mod?

hmm dont really understand what that diagram is trying to illustrate....


www.handbakedarcade.co.uk  <-- arcade :-)

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