(!!!) (Best RCA Single) 7199 RCA Black Plates NOS 1972 (14/10ma)

7199 RCA Black Plates NOS 1972 (DU)

pentode section (14ma) Gm=8100 (very strong)

triode section (10ma) Gm=2000 (very strong)

for:

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