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(!) (slightly microphonic tube) 12AX7 Amperex Bugle Boy Holland

(!) (slightly microphonic tube) 12AX7 Amperex Bugle Boy Holland "long plates" used/strong 1958 (Gm=1640/1690)

$ 79.99

1 low noise slightly microphonic tube) 12AX7 Amperex Bugle Boy Holland "long plates" used/strong "D" getter with flat-foil crossbar (mC5-delta8F=1958) copper grid posts

1 section) Gm=1640 (1.0ma)

1 section) Gm=1690 (1.2ma)

 

Good used GM range 1500-1700

 

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