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5687ˇ
 
(slightly microphonic tube) JRP-5687 Raytheon NOS black plates D getter NOS 1956 (40.5/45.5ma)

(slightly microphonic tube) JRP-5687 Raytheon NOS black plates D getter NOS 1956 (40.5/45.5ma)

$ 29.99
(slightly microphonic tube) JRP-5687 Raytheon NOS black plates D getter NOS 1957 (34.5/36.5ma)

(slightly microphonic tube) JRP-5687 Raytheon NOS black plates D getter NOS 1957 (34.5/36.5ma)

$ 27.99
5687WA GE used/tests like new 1970's (44/45ma) (highest Ma and Gm)

5687WA GE used/tests like new 1970's (44/45ma) (highest Ma and Gm)

$ 34.99
5687WA Sylvania JAN used/tests like new 1960's (39/43ma) (high Ma and Gm)

5687WA Sylvania JAN used/tests like new 1960's (39/43ma) (high Ma and Gm)

$ 27.99
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