In Reply to: 6SF5 (nt) posted by mqracing on August 22, 2012 at 09:46:53:
This tube series is metal, but the GT version is glass. I purchased dozens of 12SF5GTs last year in anticipation of building more amps with 12V octals.
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Follow Ups
- Don't forget the 12SF5 - Triode_Kingdom 13:34:43 08/22/12 (0)