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Show Good Mounting for the Spider-Web Coili Spider-web coils are very easily constructed con-structed and because of their efficiency they have found favor for amateur receiving re-ceiving sets. The difficulty In mounting mount-ing these colls has presented a stum-, bllng block to beginners and has more or less retarded their general adoption. adop-tion. First obtain some fairly thin sheet brass, cutting It to size and shape as required. For a movable or coupling mounting, two right-angle brass strips are fastened to the panel as shown. They can be -lnch wide, the length depending upon the personal wishes of the builder. Two more strips of almost the same size, except for the flanges which are set as shown to clasp the coil terminals, are cut and pivoted piv-oted to the first angles. Use 6-32 Inch Hostler tjf Ifrry Simple and Convenient Manner of Mounting Honeycomb Coils. machine screws and hexagon nuts for pivots and for clamping the angles to the panel. To ench coll affix the small brass strips cut to the shape' Indicated, driving the pointed tips Into the coll for securely. The strips are spaced the same distance as the clasps on the panel to permit contact. (The wire leads are soldered to their respective re-spective brass strip.) A stationary coll mounting may be designed In the same manner so that. If It is ever desired, It too may be varied. Be certain that the clasps have sufficient spring to securely hold and make good electric contact with the coll terminal strips. It Is not necessary to have the cells running run-ning a certain direction as they can be Inserted In the holder In cither direction, an Important feature. Possibly a word concerning the spider-web colls themselves would not be out of place here. Use No. 24 I). C. C. throughout. This wire Is goed for all colls In receiving sets nnd manufacturers man-ufacturers and amatours would do well to standardize on it. The forms can be mnde from two or three circular discs of stiff mnnlla board glued together to-gether under pressure. To the top nnd bottom, glue a strip of varnished cambric cam-bric sheet or empire cloth. Nine or eleven radial slots are cut In the form and the wire carefully wound on till the desired Inductance Is obtained. A -number of these colls, of varying turns, can be made and will prove satisfactory satisfac-tory In the reception of different wavelengths. wave-lengths. ( Science and Invention and Radio Nwa.) |