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In Reply to: RE: Can someone tell me if 7058 tubes will work in my phono stage? posted by Dave Pogue on November 1, 2020 at 04:51:51:
If pin 9 has continuity with pin 4&5, its safe to consider it a 12AX7 equivalent. Both RCA and Sylvania call pin 9: I.C. - "internal connection - do not use" which allows connection to the heater center-tap - or not.
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- RE: Can someone tell me if 7058 tubes will work in my phono stage? - Tom Bavis 08:18:42 11/01/20 (0)