The recording tube is a cathode-ray type of storage tube embodying a new operating principle which enables reading to be accomplished without disturbing the information written into the tube. An output signal comprising a full modulation of several microamperes can be read out of the tube for 20,000 complete scannings of the storage surface with no appreciable deterioration in the signal quality and only a few per cent decrease in signal level. The output signal may be observed on a monitor tube which is scanned in synchronism with the reading beam and it may also be observed directly on a fluorescent screen within the recording tube. The theory underlying the operation of the recording tube is developed in detail.
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Hergenrother et al. (1950) studied this question.