(!!!!) (Best Pair) ECL86 Mullard UK NOS 1966-1973 (1.8/1.4ma and 37.2/37ma)

1 matched pair) ECL86 Mullard UK NOS 1966-1973 same build 1 tube) 1.8ma/Gm=2000 and 37.2ma/Gm=10,350 branded Sylvania 1973 1 tube) 1.4ma/Gm=1800 and 37.0ma/Gm=10,000 branded Philips 1966   Matched on Amplitrex Good Ma triode = 1.1-1.2ma and Gm=1500-1600 Good Ma pentode = 30-35ma Gm=9000-10,000   recommended for: - Shindo Aurieges L linestage - Headamp Aristaeus 2007- Sennheiser Orpheus headphone amp- TELEFUNKEN HYMNUS CONSOLE 1962- Revox Model 40 Stereo amp made in Switzerland (by Willi Studer)- Hammond M-100- GRUNDIG SO 190 Ua1 CONSOLE 1962