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Noisy VIC Power Supply
Posted: Wed Nov 14, 2012 9:10 am
by JohnnyRockets
My power supply for my VIC has a low humming sound or buzzing sound when it is on.
Is there a way to get rid of this?
This is my second power supply with this hum.
Posted: Wed Nov 14, 2012 9:36 am
by Pedro Lambrini
Usually it's just an age thing and is harmless. If I recall it's something to do with the coil transformer being cracked over time or something...
It does seem a bit of bad luck that both your PSU's buzz though. That would drive me crazy too!
Posted: Mon Nov 19, 2012 3:11 pm
by shem
Yeah the buzzing/humming is normal that's why commodore used to fill the old brick psu's with epoxy resin it put a stop to the buzzing
but a lot of them overheated as a result and the epoxy made it impossible to replace the caps and regulator
Posted: Mon Nov 19, 2012 9:17 pm
by Jeff-20
Wow, I never understood that whole epoxy thing. Honestly, I hadn't given it much thought, but I am now glad to know why they did that.
Posted: Tue Nov 20, 2012 8:27 pm
by JohnnyRockets
Thanks all!
Wished I could fix it, but it isn't that bad...
Posted: Fri Nov 23, 2012 8:21 pm
by callan
Jeff-20 wrote:Wow, I never understood that whole epoxy thing. Honestly, I hadn't given it much thought, but I am now glad to know why they did that.
I can't find the quote at short notice, but I recall the comment from Bil Herd (C128 / C264 design engineer) that "It was very hard to set fire to a big hunk of epoxy".
Callan