Gas-filled tubes 1970-01-01
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Guitar amplification tubes 1970-01-01
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Neon lighting 1970-01-01
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Vacuum tube displays 1970-01-01
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Valve amplifiers 1970-01-01
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12AT7 1970-01-01
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12AU7 1970-01-01
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12AX7 1970-01-01
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12BV7 1970-01-01
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1L6 1970-01-01
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25L6 1970-01-01
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300B 1970-01-01
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4-1000A 1970-01-01
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5751 1970-01-01
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5Y3 1970-01-01
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6AK5 1970-01-01
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6AQ5 1970-01-01
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6DJ8 1970-01-01
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6GH8 1970-01-01
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6L6 1970-01-01
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