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(slightly microphonic - good value) 5687 Raytheon black plates NOS "square" getter halo 1950's (37/39ma) (strong Ma and Gm)
(slightly microphonic - good value) 5687 Raytheon black plates NOS "square" getter halo 1950's (37/39ma) (strong Ma and Gm)
$ 24.99
1 slightly microphonic low noise tube) 5687 Raytheon black plates NOS "square" getter halo mid-1950's
1 section) 37ma Gm=11,300
1 section) 39ma Gm=11,800
microphonics are low, only slight thump when tapping on tube in circuit
Recommended for
Manley
Modwright
Audio Note
Ray Samuels
Ayon
Kondo
Mastersound
Audio Thrills
Loth
See more: vacuum tube
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 5687 Raytheon black plates NOS "square" getter halo 1950's (37/39ma) (strong Ma and Gm) "Pin It")