(!!!!) (Best Value Pair) 6BQ7A RCA black plates NOS “”D”” and “”U”” getter 1957 (9/16ma and 9/14.5ma)

1 low noise pair) 6BQ7A RCA black plates NOS 1957

1 tube) 9/16.0ma Gm=7100/8800 (KI) Mar, 1957 “”D”” getter

1 tube) 9/14.5ma Gm=7100/8500 (KH) Feb, 1957 “”U”” getter

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