. Practical wireless telegraphy; a complete text book for students of radio communication . Fig. 139—Vertical or Fan Aerial. 118 PRACTICAL WIRELESS TELEGRAPHY. W5ULMQRS. Fig. 140—XTmbrella Type Aerial. mentioned that the natural wave length of a four-wire horizontal aerial with the wires spacedabout IVi feet apart will be approximately to times the total length of the aerial, that is, the length from the extreme end down tothe apparatus at the station house. Thisfactor is, of course, extremely approxi-mate, for it does not take into account thepresence of nearby conductors, such aschim
. Practical wireless telegraphy; a complete text book for students of radio communication . Fig. 139—Vertical or Fan Aerial. 118 PRACTICAL WIRELESS TELEGRAPHY. W5ULMQRS. Fig. 140—XTmbrella Type Aerial. mentioned that the natural wave length of a four-wire horizontal aerial with the wires spacedabout IVi feet apart will be approximately to times the total length of the aerial, that is, the length from the extreme end down tothe apparatus at the station house. Thisfactor is, of course, extremely approxi-mate, for it does not take into account thepresence of nearby conductors, such aschimneys, metal roofs, mast guys, trees,etc., some of which have the effect of in-creasing the capacity of the system. For an aerial system comprising, let ussay, four wires spaced 2^ feet apart, thenatural wave length is not much greaterthan that of a two-wire aerial with equiva-lent spacing, because although the additionof wires increases the capacity slightly, italso decreases the total inductance of thesystem, and generally these two factorsnearly offset each other. Thus, in a giveninstance, a two-wire aerial with wiresspaced 8 feet apart had a natural waveleng
Size: 1592px × 1570px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
