The 6FJ7 is a 12 pin compactron equivalent of the 6DN7. Tested as shown on B&K 707 Dyna-Jet Dynamic Mutual Conductance Tube Tester.
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This is setup tube chart book only.
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I think this is a copy but it's a good one in good condition, quite readable and ready to use.
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7 pages with fold out schematic. Dated 1946. Slightly musty odor from age (not smoke). We see no writing on pages but it is still possible.
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The 6FM7 was developed as vertical deflection oscillator and amplifier. Of course it can be used for other purposes as well like many TV tubes. Tested as shown on B&K 707 Dyna-Jet Dynamic Mutual Conductance Tube Tester.
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Model: 1961 La Radiotechnique EF86 6267 (Suresnes, France)w/ Valvo Label. Date code: 8Y5F1 J2 (8Y5 = EF86 production gen #5,F = Suresnes, France, 1 = 1961, J = October, 2 = Week 2 of the production month).
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