(!!!) (Best Pair) 7199 RCA Black Plates NOS 1960's (14/7.2ma and 14/8.2ma)

1 pair) 7199 RCA Black Plates NOS 1960's

1 tube)

pentode section (14ma) Gm=7000 (strong)

triode section (7.2ma) Gm=1900 (strong)

1 tube) 

pentode section (14ma) Gm=7200 (strong)

triode section (8.2ma) Gm=2000 (strong)

for: 

- Bogen BD-212
- Dynaco ST-70, SCA-35
- Ampeg B25, B25B
- Heathkit AA-111
- Stromberg Carlson
- Ampex Concerto 1961
- Scott LK 150