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In Reply to: What is the preferred 6550 tube for Audio Research amps? posted by Mike B. on June 3, 2015 at 10:20:22:
IIRC, that amp used Svetlana (=C=) 6550Cs, which are no longer available.
Contact AA sponsor Jim McShane and learn what he suggests. ARC has been known to call for tubes which bias "peculiarly".
Eli D.
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Follow Ups
- RE: What is the preferred 6550 tube for Audio Research amps? - Eli Duttman 10:45:16 06/03/15 (1)
- RE: What is the preferred 6550 tube for Audio Research amps? - Mechans 09:48:53 06/04/15 (0)