OCR Text |
Show OF INTEREST TO FANS A good receiving set cannot bo built in a hurry. All horizontal serials have a dlrec- j tional tendency. ' Never use a No. 14 copper wire, or Its equivalent In the "A" battery circuit. cir-cuit. 1 The main requirements of a stor- ! age battery are: Charging It regular- ! ly, keeping It clean and adding pure j distilled water to it every ten days ! r .v J A detector has nothing to 1o with the selectivity of the set. Tuning depends de-pends u;ion the design of the coils, condensers, the circuit and the sys- i tern. A battery Is well charged when thfl I hydrometer shows a specific gravity of the solution between I2.V) nnd 1."iO0. j It Is practically dead when the hy. ' drometer shows n reading of liT.O or I lower. ! Wicwacvini;. the use of semaphore ; hard flarrs t:s a means ff v1s-nal naiiti? in the United Stales nnny, l as j been rejihrc d by ntfl'o. j To p;.ncp tnn:- evenly on coll tnh'-s, ( guide the n-ires with a corih. !!: g ', cerefn! r.ot to strip the Insula t i. n. i There have or.'y been six rne'l-u!s i of '!tt: !rlrg variolic forms of no'Io frer;"-rcr eti.'-r'-. The c-f was the ; Sir: iL'M S',ai-k ir-'p. f i!'n-rof) hy thij : ro-ary snarV i.-at-. t' e s; ;. r hro-ioin ro- ! tarv r.-p. tte prr lied gap an urc, ;a:'y .h tube. j |