(!!!) (Recommended Single) 6BK7A Raytheon black plates NOS "D" getter 1950's (7.2/8.2ma) (great sub for 6N1P)

6BK7A Raytheon black plates NOS "D" getter 1950's

7.2ma Gm=5900

8.2ma Gm=6500

Tested on Amplitrex 

Good Ma range 6-8ma

Good Gm = 5000-6000

(also see 6BZ7 and 6BQ7A, sub for 6N1, 6N1P)

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