I picked up four of these a few years ago but haven't had a chance to use them yet. Don't think I paid that much however. Will prob try all AX7 first to preserve borrowed B+.
12AX7 might be the single worst possible choice for a follower. You'd do much better with a 12AT7, 6DJ8, or other higher-current higher-gm tube. MOSFET is even better if you mind the drain-gate capacitance.
Or I could throw in one of the myriad 12AU7s I have lying about. 🙂 Will have to see how heavily loaded the PT is in stock form.
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