Well i ran into a little problem with the ct-17, developed a humm.. Did some research online and tracked it to the power supply of the preamp. I guess the caps were getting old. thank god i know how to work on electronics. Had almost all the caps here.. Most I had were over rated, but seem to work fine, Still need to replace one. As the one i replaced it with was a cheap junky off brand chinese cap LOL 90% of my humm is gone. Thanks for all the info guys. This is turning out to be fun Here is the caps i had too pull outta the carver power supply.. If anyone is curious.. Some of the caps i put in were used, might just order all new.. Still rockin !!!! Oh yea Lots of nasty glue too that stuff sucks!!!