5687WA Raytheon black plates used/very good 1960 era (38/39ma) (High Ma and Gm)
$ 17.99
1 low noise tube) JRP-5687WA Raytheon black plates used/very good 1960 era in white box
38ma Gm=11,900
39ma Gm=12,500
Good Ma range 30-35ma
Recommended for
Manley
Modwright
Audio Note
Ray Samuels
Ayon
Kondo
Mastersound
Audio Thrills
Loth
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 (High Ma and Gm) "Pin It")