(!!!) (Recommended Single) 6BZ7 RCA black plates “”U”” getter NOS 1957 (9.0/9.4ma)

6BZ7 RCA black plates “”U”” getter NOS 1957 (KJ)

9.0ma Gm=6800

9.4ma Gm=6600

Tested on Amplitrex

Good Ma range 6-8ma

Good Gm = 6000

(also see 6BZ7 and 6BK7B)

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