(!!!!) (Best RCA Single) 5687 RCA black plates NOS 1963 (39.2/41ma)
$ 69.99
1 low noise tube) 5687 RCA black plates NOS 1963
1 section) 39.2ma Gm=11,100
1 section) 41.0ma Gm=11,200
Good NOS Ma range 30-35ma
Recommended for
Manley
Modwright
Audio Note
Ray Samuels
Ayon
Kondo
Mastersound
Audio Thrills
Loth
See more: vacuum tube
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 (Best RCA Single) 5687 RCA black plates NOS 1963 (39.2/41ma) "Pin It")
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