(!!!!) (Good Value Pair) 6L6WGB=5881 Sylvania and Philips JAN black base 1979-1986 (72ma and 73.4ma)

1 Pair) 6L6WGB=5881 Sylvania and Philips JAN black base 1979-1986

1 tube) 72.0ma Gm=6150 used/tests like new 1979

1 tube) 73.4ma Gm=5900 NOS 1986 branded Philips

Matched on Amplitrex

Good Ma 55-70ma

Good Gm = 5500-6000