5AS4A vs. 5U4

John,
Thanks for the fantastically comprehensive response! I'm looking forward to experimenting in the days and weeks ahead. Tell your friend at Cary that I'm in love with the amp.
Peter

I used Mullard GZ37's with very favourable results.

I have a great pair of sylvania 5u4's that I simply don't use anymore. They will crush anything russian made. I'll trade you for a cd of your choice. I like expanding my horizons....
Emery
emfoods@yahoo.com