(!!!!) (Slightlly microphonic single) JAN-CHS-12AU7 Sylvania "black plates" with "D" getter halo NOS 1951 (9.8/10ma)

1 slightly microphonic low noise tube) 12AU7 Sylvania "black plates" and "D" getter halo 1951 in white box copper grid posts "D" getter halo spot-welded to plate post 9.8ma Gm=2100 10ma Gm=2200  - low microphonics - not severe     Recommended for - Cayin MT-35 Integrated amp- Rogue Audio Cronus- Rogue audio Perseus + Rogue audio stereo 90, - Sun Audio 1000- CJ PV10- VTL 7.5 Series II- Ampeg- Aguilar DB750 driver tube- Odyssey Kandela preamp- David Berning ZOTL Pre One Audio Preamplifier