Tweakers' Asylum

RE: Chassis amplifies Transformer hum

65.41.190.27

Capt. Z

In Reply to: RE: Chassis amplifies Transformer hum posted by andyr on October 26, 2010 at 19:56:47

Space will not allow this. However, I did place small rubber O-rings between the screws and bolts, but that did not seem to make a difference.

I may be able to wedge some sorbothane or rubber fotters between the chassis and transformer. What about heat from the transformer? Will it melt the sorbothane or rubber?

Follow Ups:

RE: Chassis amplifies Transformer hum - andyr 04:27:04 10/27/10 (3)
I don't think heat from the transformer would melt any Sorbothane "footers". (But then I've never had a power transfomer get even warm - let alone "hot" ... maybe your amp is different?? :-)) )

The other thing you might try is stick some "Cascade" on the underside of the lid and any other vacant areas of case wall, to damp their vibrations.

Regards,

Andy.
- RE: Chassis amplifies Transformer hum - Capt. Z 04:47:38 10/27/10 (2)
  "Cascade" ??? What's that???
  Sorry for the ignorance.
  - "Cascade" is ... - andyr 12:22:40 10/27/10 (1)
    a damping material which consists of a thin layer of a bytyl rubber compound with an aluminium skin on top. The butyl attaches to the metal of the case abd the result is a constrained layer damping arrangement.
    
    Beloved by the car audio people - Dynamat is another product which is similar (although I personally prefer Cascade).
    
    Regards,
    
    Andy
    - RE: "Cascade" is ... - Capt. Z 12:45:59 10/27/10 (0)
      Just picked up some left over 'Roadkill' damping sheets from the local Car Stereo Installer. I will install it tonight and see/hear.

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