Post by Boomzilla on Jan 28, 2023 8:24:36 GMT -5
My Black Ice Audio F22 needs a retube in the foreseeable future. It uses four 12-AX7A drivers and four EL-34 outputs. The circuit (by the late Jim Fosgate) treats each driver/output pair independently and biases them such that they should all be gain matched even if the original tubes weren't matched. Makes it easy to pick up a tube here & there... If you have any of these tubes on your closet shelf that you'd be willing to part with, please PM me with availability and the price you're asking. Thanks - Glenn
Mr. Jim Fosgate, by the bye, is recently deceased. The audio press hasn't made much of it, but he was a respected circuit designer and a part of audio history. RIP.
Mr. Jim Fosgate, by the bye, is recently deceased. The audio press hasn't made much of it, but he was a respected circuit designer and a part of audio history. RIP.
