(!!!) (Single) 7199 RCA Black Plates NOS 1970 era (10.6/8.6ma)

7199 RCA Black Plates NOS 1970 era

pentode section (10.6ma) Gm=6600 (very good)

triode section (8.6ma) Gm=2100 (very good)

for:

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