Tested on Amplitrex AT-1000 computerized tube tester (fixed bias mode). Two GE 6386 tubes. Etched 6386 numbers on glass. SPEC (100%) value for 6386 tube = 4000 gm and 9.6 mA plate current. PASS/FAIL grade for 6386 (65% of spec) = 2600 gm and 6.2 mA plate current.
Two GE 6386 Tubes /Amplitrex Tested +100%/D Get /x3 Mica /Black Plates 1958 Date
Two GE 6386 tubes. Tested on Amplitrex AT-1000 computerized tube tester (fixed bias mode). Etched 6386 numbers on glass. SPEC (100%) value for 6386 tube = 4000 gm and 9.6 mA plate current. PASS/FAIL grade for 6386 (65% of spec) = 2600 gm and 6.2 mA plate current.
Two GE 6386 Tubes /Amplitrex Tested / D Getters / x3 Mica / Black Plates 1950’s
Two GE 6386 tubes. Tested on Amplitrex AT-1000 computerized tube tester (fixed bias mode). D getters / square getters / angle D getter. Etched 6386 numbers on glass. SPEC (100%) value for 6386 tube = 4000 gm and 9.6 mA plate current.
Two GE 6386 Tubes /Amplitrex Tested +100%/D Get /x3 Mica /Black P / Mid 1950’s
Two GE 6386 tubes. Tested on Amplitrex AT-1000 computerized tube tester (fixed bias mode). Very early production 6386 tubes. Etched 6386 numbers on glass. SPEC (100%) value for 6386 tube = 4000 gm and 9.6 mA plate current.
Two GE 6386 Tubes /Amplitrex Tested Balanced / D Get / x3 Mica / Early Type 1956
Tested on Amplitrex AT-1000 computerized tube tester (fixed bias mode). Two GE 6386 tubes. Etched 6386 numbers on glass. SPEC (100%) value for 6386 tube = 4000 gm and 9.6 mA plate current. PASS/FAIL grade for 6386 (65% of spec) = 2600 gm and 6.2 mA plate current.