To the list: Not to open Pandora's box, but a few pointers on the ups and down on Ten 422 centurion amp would be appreciated. Have a line on one that is 15 year or so old, seller sez transformer has been professionally rewound (read better O.E.M.), and boards and qsk updated to 422B spec. Also sez map meets current spec of Po. 73, Gary...wa6fgi