Model making; including workshop practice, design and construction of models, a practical treatise for the amateur and professional mechanic .. (1919)
Yates, Raymond F. (Raymond Francis), 1895- ed · New York, The Norman W. Henley Pub. Co. · leaf 324
ficiently sensi-tive to respond to the impulses sent out by a spark coilof the standard **2-inch wireless type, using the obso- A Model Submarine With Radio Control 321 lete method of connecting the antenna and ground acrossthe spark gap. The maximum distance for fairly reliable operationwas found… … Fig, 231—The central hatch lifted, showing the storage batteries. Thesignal lamps are shown at the right The adjustment of the coherer is a tedious task, but,when once attained, it is reasonably permanent. A mix-ture of about equal parts of pure silver and nickel filingsis used, which must be quite…
Machinery
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
