(!!!!!) (Holland Single) 12AU7 Pope Holland NOS 1971 dimpled disc halo (12/13.4ma)

1 low noise tube) 12AU7 Pope Holland NOS 1971 dimpled disc halo 1 section) 12.0ma Gm=2400 1 section) 13.4ma Gm=2500   - similar sound to 7316 Philips SQ Holland - very good detail and upper mid presence and good bass   Tested on Amplitrex Good Ma range 8-10ma Good Gm range 1800-2200   recommended for: - 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 - Ashdown Little Bastard 2010- BK Butler Tube Driver - Sonny Jr. Four-ten / Customized Harp Amp- Conrad Johnson PV 10AL 1993