Putting vintage tubes in the power supply of pre

Dan001,

If you disclose the brand and model of your preamp, someone at Audiogon may have direct experience or at least can look up the circuit and tubes used and make an educated guess.

Cool!

yes..my pre is a canary 906...i would also like to know which tubes in the LS box are the followers out of the 4..canary is brutal about responding to customers....so..if anyone knows...would be great..the tubes in the power supply are 2 6v6..1 6sl7 and 1 5ar4

Just a suggestion: try a NOS Mullard 5AR4/GZ34 from the Blackburn plant, in the rectifier slot first, and listen for improvements. Then find a NOS TungSol 6SL7GT/VT229 Round Plate(from the 40's). There are a lot of good NOS 6V6 power tubes that will each give you a different flavor in your presentation. ie: If you want a bit more warmth; you might try a pair of Brimars. For a cleaner, more detailed sound; Sylvania or Ken-Rad. RCAs will be somewhere in between. Have fun, and enjoy your music.