Abstract
High-output temperature-stable delay lines with relatively short delays up to 200 μs for use with transistorized coding and decoding devices are described.The delay lines used nickel and nickel-iron alloy tubes as the delaying media, and the input and output transducers are simple mouldings whose positions are continuously adjustable. With a pulse width of 1 μs a minimum delay of 1.5 μs has been achieved. With multiple-tapped lines, delay between adjacent taps has been reduced to less than 1 μsThe design and construction of the transducers and the manufacture and properties of the delay-tube media are discussed.A particular delay line described has a total delay of 25 μs with 8 output taps and has been designed for use in airborne equipment: over the temperature range −10° C to +55° C its delay changes by less than 0.05 μs
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More From: Proceedings of the IEE - Part B: Electronic and Communication Engineering
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