This is a great sounding pair of 1960s to 1970s Tesla brown base dual “OO” getter tubes. TV7-D/U tested 46 & 47 where minimum is 30 and new tubes test 48-52. Plate current matched one milliamp apart at 32 & 33. Watch demo video in photos section.
This is a great sounding pair of 1960s to 1970s Tesla brown base dual “OO” getter tubes. TV7-D/U tested 46 & 47 where minimum is 30 and new tubes test 48-52. Plate current matched one milliamp apart at 32 & 33. Watch demo video in photos section.