. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. TRANS A T LAN TIC TELETHON V 179 antenna gives as much improvement as would an increase in power of about 100 times. Furthermore, receiving at Houlton, Maine, rather than in the vicinity of New York, by getting to a more northerly lati- tude, is equivalent to a power increase of 50 times. The antenna loca- tion and directivity, therefore, is equivalent to a transmitted power in- crease of 5,000 times. The receiving set employed with these antennae at Houlton is of a do
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. TRANS A T LAN TIC TELETHON V 179 antenna gives as much improvement as would an increase in power of about 100 times. Furthermore, receiving at Houlton, Maine, rather than in the vicinity of New York, by getting to a more northerly lati- tude, is equivalent to a power increase of 50 times. The antenna loca- tion and directivity, therefore, is equivalent to a transmitted power in- crease of 5,000 times. The receiving set employed with these antennae at Houlton is of a double demodulation type, of very high Fig. 11—Picture of receiving antenna in Cliffwood Fig. 11 shows a receiving antenna at Cliffwood, N. J., of the type used for short waves. It is constructed of a wooden framework on which are held two parallel sets of conductors made up by bolting together lengths of copper tubing. Possibly you can make out the form of the two sets of conductors. Each set consists of vertical elements a quarter of a wave-length high and a quarter of a wave- length between successive elements. The first element is connected to the second by a conductor connecting the upper ends of the elements, the second is connected to the third by a conductor connecting the lower ends and so on. The whole effect gives a degree of directivity equivalent to an in- crease in power of about 15 times. This general question of short wave receiving is a fruitful field for investigation and for the ingenuity of the engineers. A large number of arrangements have been devised. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Telephone and Telegraph Company. [Short Hills, N. J. , etc. , American Telephone and Telegraph Co. ]
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
