In Reply to: RE: Different tube than a 6AS7 posted by Jeff Davison on January 21, 2012 at 09:42:27:
Another big advantage of the WE 421A is that it (unlike the 6AS7) can reliably be found with matching tube halves.
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Follow Ups
- WE 421A - Jim Dowdy 01/21/1210:17:05 01/21/12 (0)