(!!!!) (Best Single) 12BH7A Sylvania rebranded GE black oval plates "U" getter NOS 1956 era (11.2/14ma)

1 low noise tube) 12BH7A Sylvania rebranded GE black oval plates "U" getter NOS 1956 era

11.2ma Gm=2900

14.0ma Gm=3000

 

- detailed and open

 

recommended for:

- Octave M90 mono amps (http://tubeworldexpress.shop/)
- 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