1 low noise tube) 12AT7WA Raytheon NOS black plates – triple mica – O getter halo 1960”s mis-matched triode sections in white box

7ma Gm=4000

12ma Gm=5300

Recommended for

– Eclair Engineering ”Evil Twin” Tube DI (direct input box)
– Atma-sphere preamp
– JC Morrison custom phono
– David Berning Quadrature Z amp