(!!!!) (Recommended Pair) 6BQ7A RCA black plates NOS 1967 same date codes (11.8/12ma and 11/12.2ma)

1 low noise pair) 6BQ7A RCA black plates NOS 1967 same date codes (BM)

1 tube) 11.8/12.0ma Gm=7600/7900

1 tube) 11.0/12.2ma Gm=7500/8100

Matched on Amplitrex

Good Ma = 8-9ma

Good Gm = 6000-6400

(also see 6BZ7 and 6BK7B)

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