Are there any of the Russian tubes that are currently avaiable that can be used as a replacement for the 8122 found in the National NCL-2000 amplifier? 73, Bill ===== Bill Smith KO4NR -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com