(!!) 12BH7A Philco Sylvania gray oval plates “”O”” getter halo used/good 1962 (6.5/7.3ma)

1 low noise tube) 12BH7A Philco Sylvania gray oval plates “”O”” getter halo used/good 1962 in white box

6.5ma Gm=2300

7.3ma Gm=2500

– 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