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