6DR7 Sylvania branded GE black plates NOS 1977 (4.6ma/25ma)
$ 8.99
1 tube) 6DR7 Sylvania branded GE black plates NOS 1977 (SL)
4.6ma Gm=3300
25ma Gm=5100
Good Triode = 1.0-1.5ma Gm=1400-1600
Good Pentode = 25-35ma Gm=5500-6000
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