(!!!!) (Recommended Single) JAN-7308 Raytheon NOS 1968 (12.5/16.8ma)

1 low noise tube) JAN-7308 Raytheon NOS 1968 slightly offset glass base

12.5ma Gm=10,600

16.8ma Gm=12,700

JAN=Joint Army Navy

Good Ma range 12-15ma

Good Gm range 11,000-13,000

7308=Premium low noise 6922 

(smooth and quiet)