Buzzzzzing Transformers

Gs5556, your post motivated me to fix a buzz in my shop stereo. One of my (1980 vintage) PS Model 2 power amps running in mono had a loose transformer mounting screw and a bad electrolytic in the input shunt R/C. A new cap and some duct seal under the transformer got rid of the hum. Now if I could just get rid of the fizzy sound that the same amp has that sounds sort of like pink noise from an FM radio with the tuner being slightly twizzled. Noisy input section transistor maybe? Thanks for any suggestions.

Thank you all for the thoughtful and very informative answers. I am currious, and maybe I should be posting a new thread for the following: I recall having read some years ago about a tweak that a reviewer of "positive feedback" performed on his amp's toroidal transformers. He removed the top holding plates and the screws that hold them to the chassis and just let the tranformers stand in place without any fasteners. He reported that the music was sort of liberated and that detail and inner resolution etc, etc, increased dramatically. Of course he warned that the transformers were loose now and any attempt to move the amps should be done very carefully! or disaster could ensue.
How do you like that?
Ted

Gs5556, You guessed it right, my transformers are toroidal. Their maker is obscure and out of business now, so I did not mention the name. They are "Acoustic- Electronics" "photons" One currious modification, that I think was added later by their first owner, was that they have a second smaller toroidal transformer sitting on top of the main one. I think this gave additional power to the amps.
Ted

Tphalieros, the "loose transformer" tweak makes sense. The 60HZ vibration from the transformer was decoupled from the PC boards etc. in the amp and removed a colouration. A rubber mount system would probably have a similar but safer effect. You see this in some amps (YBA being one) or a separate box entirely for the power supply.

Go to psaudio.com as they have a section on transformer buz! very interesting article! Happy Listening!