RCA-branded Mullard Xf2 double halo EL34/6CA7 - NOS (matched quad) - Vacuum Tube Valley calls these the "Holy Grail of EL 34's" (and they would want more than $400.00 for just TWO of them - IF they had any in stock. They don't.) Tube World has a pair available for $375.00. Of course, they aren't really that well matched. These tubes are VERY closely matched NOS Mullard-manufactured, RCA-branded Xf2 double halo mid 60's production tubes.
RCA-branded Mullard Xf2 double halo EL34/6CA7 - NOS (matched quad) - Vacuum Tube Valley calls these the "Holy Grail of EL 34's" (and they would want more than $400.00 for just TWO of them - IF they had any in stock. They don't.) Tube World has a pair available for $375.00. Of course, they aren't really that well matched. These tubes are VERY closely matched NOS Mullard-manufactured, RCA-branded Xf2 double halo mid 60's production tubes.
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