Stumbled across this http://www.valvette.us/tube_types.html I mainly play thru a PA system so it does'nt realy concern me (yet) hope it helps (anyway) mox -- I am using the free version of SPAMfighter for private users. It has removed 702 spam emails to date. Paying users do not have this message in their emails. Get the free SPAMfighter here: http://www.spamfighter.com/len