http://www.ebay.com/sch/i.html?_odkw=sVELTLANA+SV83&_from=R40&_osacat=0&_from=R4...Friday, I put them as a bulk order on eBay. All of mine were purchased new and I have never had one fail in 14 years. That is a track record. The last time I will post about them here.
If you never had an original Svetlana SV83...now is the time. 48 States only. Market value is $15 per tube/new (see thread above). You could sell them for what you paid for them. Meaning, with the CCE, CKC mods on the Super Zen, the EV's or EL84's are pretty much the ticket. But, if you have a C, C+ or SE84CS.....I love the Svetlana SV83. However, try them in your CKC.....you might like it Mikey?!
Oh, an Caveat Emptor: Svetlana SV83 NOS can be used in Steve's Amps. THEY ARE NOT A DIRECT DROP IN REPLACMENT FOR JUST ANY EL84 AMP. CONTACT YOUR MANUFACTURER.
In conclusion, the bulk order one an done, to a DIY multiple style Amp builder dude, is easiest for me. However, I'm willing to do a 4 pair minimum multiple orders to Decware Forumer's thru Thursday. Peace, Stone.