Radio, miracle of the 20th century ... a story of human achievement that stands unrivalled in the history of humanity, together with a colorful portrayal, giving a broad, general view of the whole subject of wireless telegraph and telephone and its marvelous development (1922)
Drinker, Frederick E. [from old catalog], Lewis, James G., [from old catalog] joint author · [Philadelphia, Printed by National publishing co.] · leaf 242
copper wire, that should be bentin such shape that it can conveniently be turned on itscircumference in the binding post hole. To the right endof this heavy wire there must be soldered a piece of finewire—a section of fine mandolin wire about one and one-half inches long will serve. The crystal is… … A -Home Made Crystal Detector parts thus assembled, the post holding the catswhisker must be connected to the left hand binding postwith a bit of the regular circuit wire, and the metal basesupport of the crystal must be similarly connected to theleft binding post. In operation the copper wire with…
Radio
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