(!!) 12AU7A RCA clear top used/good 1960's (7.4/8.6ma)

1 low noise tube) 12AU7A RCA clear top used/good 1960's copper grid posts

7.4ma Gm=1600

8.6ma Gm=1800

Tested on Amplitrex

Good used Ma range 7-9ma

Good used Gm range 1600-1800

- the best sounding US made 12AU7A

- the 5814A RCA is also good from 1959-1975

- also consider subs 5814A and 6189 RCA

- 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
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- David Berning ZOTL Pre One Audio Preamplifier