(!!!!) (Single) 12BH7A Sylvania gray oval plates “”O”” getter NOS 1960 era (10.4/7.6ma)

1 low noise tube) 12BH7A Sylvania gray oval plates “”O”” getter NOS 1960 era

10.4ma Gm=3400

7.6ma Gm=2800

– detailed and open

recommended for:

– Octave M90 mono amps (
– Quicksilver Audio V4 mono amp
– Quicksilver Triode amp
– Thor
– Doshi Alaap preamp
– Art Audio Diavolo
– Vexo S40 amp
– Art Audio Carissa Signature amp
– Art Audio PX25 amp
– Universal Audio LA2A