High frequency apparatus, design, construction and practical application; a practical treatise for electrical engineers, electricans, physicians, students and experimenters (1920)
Curtis, Thomas Stanley · New York, Norman W. Henley publishing company · leaf 79
cities of the condenser, a variation of the turns of the 74 HIGH FREQUENCY APPARATUS primary, closing up or opening the spark gap, etc. A fewtrials will bring the circuits into resonance and the ball atthe top of the resonator will give out beautiful streamersof purplish fire. If a piece of metal…
Electric apparatus and appliances
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