Amp Rectifiers

["Smith, Richard" <rismith@xxxxxxxxxxx>]

Can anyone tell me what a Rectifier does?  Does it matter 
whether an amp has a tube rectifier or a solid-state rectifier?  
Does a tube rectifier give an amp a different sound than a 
solid-state rectifier?  How important is it to the sound to 
have a tube rectifier?  My Fender "Champ 12" has tube preamp 
and power stages, but a solid-state rectifier.  Would it be 
possible or worthwhile having it modified to tube rectifier?

Richard J. Smith, R.A.