6N14P 1970-01-01
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6N1P 1970-01-01
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6N24P 1970-01-01
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6N2P 1970-01-01
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6N3P 1970-01-01
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6P1P 1970-01-01
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6SN7 1970-01-01
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6V6 1970-01-01
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7AK7 1970-01-01
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807 (vacuum tube) 1970-01-01
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833A 1970-01-01
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845 (vacuum tube) 1970-01-01
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866A 1970-01-01
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8974 1970-01-01
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955 acorn triode 1970-01-01
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Acorn tube 1970-01-01
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Amperex Electronic 1970-01-01
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Aquadag 1970-01-01
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Audion 1970-01-01
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Backward-wave oscillator 1970-01-01
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