Noisy VIC Power Supply

JohnnyRockets · Post by **JohnnyRockets** » Wed Nov 14, 2012 9:10 am

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.

Pedro Lambrini · Post by **Pedro Lambrini** » Wed Nov 14, 2012 9:36 am

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!

shem · Post by **shem** » Mon Nov 19, 2012 3:11 pm

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

Post by **Jeff-20** » Mon Nov 19, 2012 9:17 pm

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.

JohnnyRockets · Post by **JohnnyRockets** » Tue Nov 20, 2012 8:27 pm

Thanks all!

Wished I could fix it, but it isn't that bad...

callan · Post by **callan** » Fri Nov 23, 2012 8:21 pm

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