Pair of NOS Sylvania 7027A tubes, with original boxes. A perfect Gm match, and about a 6mA difference in plate current, as tested on the Amplitrex AT1000. Number 7027A. Actual manufacturer Sylvania.
Pair of NOS Sylvania 7027A tubes, with original boxes. A perfect Gm match, and about a 6mA difference in plate current, as tested on the Amplitrex AT1000. Number 7027A. Actual manufacturer Sylvania.