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(slightly microphonic) 5687 Raytheon black plates NOS

(slightly microphonic) 5687 Raytheon black plates NOS "square" getter halo 1950's (37/39ma) (strong Ma and Gm)

$ 29.99

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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