(!!!) 6BZ7 RCA black plates "U" getter NOS 1954 (9.6/12.2ma)

6BZ7 RCA black plates "U" getter NOS 1954 (422)

9.6ma Gm=7200

12.2ma Gm=7800

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