(!!!) (Recommended Single) 6BQ7A RCA black plates NOS 1962 (10/14ma)

1 low noise tube) 6BQ7A RCA black plates NOS 1962

10ma Gm=7300

14ma Gm=8400

Tested on Amplitrex

Good Ma = 8-10+ma

Good Gm = 6000-6400

(also see 6BZ7 and 6BK7B)

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