(!!!!) (Best Bugle Boy Single 1959) 12AU7 Amperex Bugle Boy England (Mullard) long plates with "D" getter like new 1959 (12.4/9.8ma)

1 low noise tube) 12AU7 Amperex Bugle Boy England (Mullard) long plates with "D" getter like new 1959 good printing in white box

(K61-R9F=1959)

1 section) 12.4ma Gm=2100

1 section) 9.8ma Gm=2000

Matched on Amplitrex

Good NOS Gm range 1800-2200

Good NOS Ma range 8-10ma

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