13DR7 Sylvania branded GE NOS (1 pair)

Tube World Express Verified independent store

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1 pair) 13DR7 Sylvania branded GE NOS 1 tube) 1.8ma Gm=1700 and 34ma Gm=6000 1 tube) 1.7ma Gm=1600 and 31ma Gm=6100 Good Ma triode #1 = 1.4ma Good Ma triode #2 = 30-35ma