Abstract
A new type of nuclear magnetic resonance dispersion spectrometer using a gated beam tube is described. The characteristic feature of this spectrometer is its low noise figure of about three at the comparatively high r.f. level of 4 V. This new spectrometer is much easier to be used than an r.f. bridge because there is no delicate balance adjustment and it is free from any balance drifting. An r.f. amplifier and a detector are no longer necessary because of the amplification and detecting properties of the gated beam tube and it is possible to sweep the frequency simply by sweeping the signal generator. The frequency sweep range is about 200 Kc/sec without any adjustment of the spectrometer.
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