(!) (Best Value Single) ECL82 EI Yugo branded RSD Germany in RSD box NOS 1974 (1.7/33ma)1 tube) ECL82 EI Yugo branded RSD Germany in RSD box NOS 1974 1 section) 1. 7ma Gm=2300 1 section) 33ma Gm=6000 Tested on Amplitrex 1 section triode) Good Ma = 2. 0 2. 5ma and Good Gm=2200 2500 1 section pentode) Good Ma = 30 35ma and Good Gm=5500 6500 Recommended for Audio Note M3, M6, M9 Audio Note L2 Custom linestage Response Audio, NY (2008) Audio Note 2. 1 kit Level C Audio Note 3. 1 kit Sansui Audio Note preamps and DACS (2. 1B, 2. 1C) Audio