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EF86 variant

11/27/2005 4:11 AM
EvanEF86 variant
Is there a tube contains a EF86 and a low MU (like a 12AU7)triode, for a CF, in the same tube? For V1 in a preamp. It seems to me that there is but can't recall...Thanks

 
Replies:
steve Evan,The 7199 tube ... -- 11/27/2005 10:31 AM