1 ultra-low noise tube) E88CC=6922 Telefunken Germany <> bottom NOS 1962 good printing (mic grade)

1 section) 16.4ma Gm=13,400

1 section) 17.5ma Gm=13,800

Tested on Amplitrex

NOS Ma range 12-15ma

NOS Gm range 11,000 – 12,500

Recommended for

Audio Research,

Zanden

Air Tight

Rode

Klimo

Earmax

BAT

Cary

Musical Fidelity

Pathos

Lamm