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1 pair) 10=VT-25 SYLVANIA NOS 1940's
1 tube) 28.6ma Gm=2200 (JAN-CHS-10Y=VT-25)
1 tube) 29.6ma Gm=2200 (VT-25=10Y)
Good current range 20-30ma
Good Gm = 1800
Vplate=300V Vgrid=-15V