(!!!) (Recommended Pair) 6BK7B Tungsol black plates NOS “”O”” getter 1960”s (8.6/7.5ma and 8.2/9.4ma)

1 pair) 6BK7B Tungsol black plates NOS “”O”” getter 1960”s
1 tube) 8.6/7.5ma Gm=5700/5400
1 tube) 8.2/9.4ma Gm=6100/6400

Matched on Amplitrex

Good Ma range 6-8ma

Good Gm = 5000-6000

(also see 6BZ7 and 6BQ7A, sub for 6N1, 6N1P)

– Modwright Transporter
– Schiit Lyr amp 2011
– Don Allen
– Donald North Audio (DNA) Stratus