Description
JRP-5687WA Raytheon black plates used/good 1965-1966 (28/31ma)
1 low noise tube) JRP-5687WA Raytheon black plates used/good 1966 in white box
28ma Gm=9700
31ma Gm=10,300
Good NOS mA range 30-35ma
Recommended for
Manley
Modwright
Audio Note
Ray Samuels
Ayon
Kondo
Mastersound
Audio Thrills
Loth