4x RCA 6CG7 6FQ7 Clear Top Side Getter NOS tested matched quad Industrial Brazil Taken from the same batch/box of 100.(a new average is 100% @ 2600/2600 micromhos @ 9.0/9.0 mA +/- 10%) Tube 1,2,3,4 - 2800/2800 Some history on these. They came from a a main radio station in brazil that closed down in the late 80s. They kept a select number of tubes/quads etc and unusual valves. I bought these as a lot in 2001 for my own use/collection but no longer require (random samples were tested on delivery and well within tollerance). A1 tubes for a bargain.

4x RCA 6CG7 6FQ7 Clear Top Side Getter NOS tested matched quad Industrial Brazil Taken from the same batch/box of 100.(a new average is 100% @ 2600/2600 micromhos @ 9.0/9.0 mA +/- 10%) Tube 1,2,3,4 - 2800/2800 Some history on these. They came from a a main radio station in brazil that closed down in the late 80s. They kept a select number of tubes/quads etc and unusual valves. I bought these as a lot in 2001 for my own use/collection but no longer require (random samples were tested on delivery and well within tollerance). A1 tubes for a bargain.

4x RCA 6CG7 6FQ7 Clear Top Side Getter NOS tested matched quad Industrial Brazil Taken from the same batch/box of 100.(a new average is 100% @ 2600/2600 micromhos @ 9.0/9.0 mA +/- 10%) Tube 1,2,3,4 - 2800/2800 Some history on these. They came from a a main radio station in brazil that closed down in the late 80s. They kept a select number of tubes/quads etc and unusual valves. I bought these as a lot in 2001 for my own use/collection but no longer require (random samples were tested on delivery and well within tollerance). A1 tubes for a bargain.