(!!!) (Recommended single) 5687 RCA bronze plates NOS 1970 era (38/44.5ma)
By Tube World
$ 39.99
1 low noise tube) 5687 RCA black plates NOS 1970 era
1 section) 38.0ma Gm=12,600
1 section) 44.5ma Gm=13,400
Good NOS Ma range 30-35ma
Recommended for
Manley
Modwright
Audio Note
Ray Samuels
Ayon
Kondo
Mastersound
Audio Thrills
Loth
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