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And the communications system was larger than usual. It might do for his purpose. They stayed well back from the restricted area where the whole Onzarian fleet was orbited. On the screen images appeared twenty-three Class I cruisers, each with its own fleet of cruiser escorts, scouts, disrupter carriers, tenders and screen amplifiers. Swarms of independent tactical squadrons.

These amplifiers were somewhat like the horn of a phonograph they increased, or magnified the sound, so that one could hear a voice from any part of the shop, and need not necessarily have the telephone receiver at his ear. Seeing Koku near the instrument, Eradicate had switched on the amplifier, and had called into his instrument, trying to scare the giant.

"We'll not do that," cried the boys in chorus. Nevertheless in spite of the promise there were few opportunities during the next few days for either of them to go a-visiting. The New York electricians arrived and with them came aerials, generators, detectors, tuners, insulators, amplifiers, and all the hundred and one parts necessary for a perfectly equipped radio station. Mr.

You know those vast tin amplifiers employed in big convention halls, or in out-door meetings, to carry the voice of the speaker to the remotest depths of the audience; Johnson is a vast tin amplifier of the voice of the mass.

Again the gentle plop was heard through the amplifiers and nothing more. A similar clouding spread through the already murky fluid and when the entire contents of one egg had been added, the beaker took on a solid, brown and totally opaque appearance. The scientists watched the glass container for several minutes, anticipating another possible delayed blast.

World's Largest Loud Speaker ever made. Either kind may be used with a one- or two-step amplifier or with a cascade of half a dozen amplifiers, according to the degree of loudness desired. The Telemegafone itself is not an amplifier in the true sense inasmuch as it contains no elements which will locally increase the incoming current.

Herbert E. Metcalf, 3,000 feet in the air, and which startled the City of Washington on April 2, 1919, by repeating President Wilson's Victory Loan Message from an airplane in flight so that it was distinctly heard by 20,000 people below. This wonderful achievement was accomplished through the installation of the Magnavox and amplifiers in front of the Treasury Building. Every word Lt.

World's Largest Loud Speaker ever made. Either kind may be used with a one- or two-step amplifier or with a cascade of half a dozen amplifiers, according to the degree of loudness desired. The Telemegafone itself is not an amplifier in the true sense inasmuch as it contains no elements which will locally increase the incoming current.

Herbert E. Metcalf, 3,000 feet in the air, and which startled the City of Washington on April 2, 1919, by repeating President Wilson's Victory Loan Message from an airplane in flight so that it was distinctly heard by 20,000 people below. This wonderful achievement was accomplished through the installation of the Magnavox and amplifiers in front of the Treasury Building. Every word Lt.

Where radio frequency or audio frequency amplifiers are used to couple your amplifier tubes in cascade you must take particular pains to shield them from one another in order to prevent the feed back of the currents through them, which makes the head phones or loud speaker howl.