(!!) (Recommended Single) 5814A=12AU7 Hyperlec Brive France (Holland clone) NOS 1970's rebranded National (10.0/11.6ma)

1 low noise tube) 5814A=12AU7 Hyperlec Brive France (Holland clone) NOS 1970's rebranded National Yugoslavia - dimpled disc getter

1 section) 10.0ma Gm=2100

1 section) 11.6ma Gm=2300

Tested on Amplitrex

Good Gm = 1800-2200

Good NOS mA = 8mA+

Recommended for:

Conrad Johnson PV12

VAC PA100/100

Wavac pr-t1 preamp 

Audio Note M1 preamp

Octave HP500SE (Germany)

VTL TL 7.5 MKII preamp 

Audio Note M8 

Rogue Cronus

Concert Fidelity 

Audio Valve Eklipse linestage