I bought a used amp with a couple of tubes marked, "12AX7 Schober Organ made in the USA by Raytheon" They appear to be from early '60's. Thanks for any comments.
Raytheon made a fine 12ax7, but whether or not you like or care for its sound in a specific application is a whole other question. In general, tubes made for organ applications have been selected for lower microphonics.
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