Fender Bronco Amp - tremolo ticking sound

[Amie]

If the noise is regular and obtrusive then an MP3 at 64 kbps for a few seconds would do fine. Is the noise there when the amp is idle, did you say? Give the scope idea a try, see what the noise looks like and trace the stages back and check the PS too. (Take care with over volting the input of your scope, and check the mains isolation on the transformer as well!)

GL!
Amie