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(slightly microphonic) 5687 Raytheon black plates NOS "square" getter halo 1950's (37/39ma) (strong Ma and Gm)
(slightly microphonic) 5687 Raytheon black plates NOS "square" getter halo 1950's (37/39ma) (strong Ma and Gm)
$ 24.99
1 slightly microphonic tube) 5687 Raytheon black plates NOS "square" getter halo 1950's
1 section) 37ma Gm=11,300
1 section) 39ma Gm=11,800
mcirophonics are low, only slight thump when tappin gon tube in circuit
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