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DE1271539B
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Electrical supply system
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Electrical apparatus including a transistor
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Improved active filter circuit
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Transistor audio preamplifier
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Video signal modifying apparatus
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Improved pre-set adjustment mechanism
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A method of varying the coupling between u.h.f. circuits
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Improved ultra-high frequency tuner
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Transistor switch circuit
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Apparatus for reproducing television signals recorded on magnetic tape
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Headwheel speed control system for reproducing magnetically recorded television signals
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Discriminator circuit
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Improvements in and relating to radio receiving apparatus
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Improved voltage stabilizer circuit arrangements
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Tunable oscillator
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Circuit arrangement
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GB1058819A
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Voltage limited power supply arrangements
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Improved film spool mounting means
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