(!!!!) (Long Plate Single) 12AU7 Mullard Heath UK long plates "O" getter used/good 1959 (8.8/9.0ma)

1 low noise tube) 12AU7 Mullard Heath UK long plates "O" getter used/good 1959 good printing in white box (K61-R9F=1959)

1 section) 8.8ma Gm=1800

1 section) 9.0ma Gm=1800

Matched on Amplitrex

Good used Gm range 1600-2000

Good used mA range 7-10mA

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