ISBN: 1130690911

[EAN: 9781130690910], Neubuch, [PU: RareBooksClub], RUPERT STANLEY,HISTORY,PERFORMING ARTS, This item is printed on demand. Paperback. 110 pages. Dimensions: 9.7in. x 7.4in. x 0.2in.This … More...

[EAN: 9781130690910], Neubuch, [PU: RareBooksClub], RUPERT STANLEY,HISTORY,PERFORMING ARTS, This item is printed on demand. Paperback. 110 pages. Dimensions: 9.7in. x 7.4in. x 0.2in.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: . . . overhauling the spark units. The larger discs seen in the illustration are of thin copper, placed between each spark unit to radiate away the heat caused by the sparks. The units should be inspected about once in six weeks, as the sparks are likely to wear away the inner edges of the mica insulating washers. Quenched spark gaps, made on the above lines, can be used with induction coil and battery excitation, but will only give a musical note if the coil is fitted with a rapid make and break; otherwise the spark will be of a hoarse sound which is not heard well in the receivers. The Telefunken Co. have designed a rapid make and break for their induction coils, used in the smaller stand-by transmitting outfits. The quenched spark will not work well on alternating current supply of ordinary low frequencies, where the transmitter is excited by a high voltage transformer. For use in commercial stations the Telefunken alternator is generally built for a frequency of 500 cycles per second, which, through the step-up transformer, gives 1000 sparks per second in the spark gap, so that a musical spark results. Now let us consider and analyse the advantages claimed for the quenched spark discharger. I. A pure wave is radiated, in other words, most of the energy radiated is at one wave length. This is due to the fact that the spark is rapidly quenched so that it is extinguished by the time the oscillations in the aerial circuit have reached their maximum; hence no back transfer of energy can take place from the aerial circuit to the closed circuit through the coupling coils, whether the latter are of-the auto-transformer or tesla transformer pattern. Therefore no damping of the aerial oscillations is caused by the coupling, and the aerial energy oscillates . . . This item ships from La Vergne,TN.<

2012, ISBN: 1130690911

[EAN: 9781130690910], Neubuch, [PU: Rarebooksclub.com, United States], Language: English Brand New Book ***** Print on Demand *****. This historic book may have numerous typos and missing… More...

[EAN: 9781130690910], Neubuch, [PU: Rarebooksclub.com, United States], Language: English Brand New Book ***** Print on Demand *****. This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: .overhauling the spark units. The larger discs seen in the illustration are of thin copper, placed between each spark unit to radiate away the heat caused by the sparks. The units should be inspected about once in six weeks, as the sparks are likely to wear away the inner edges of the mica insulating washers. Quenched spark gaps, made on the above lines, can be used with induction coil and battery excitation, but will only give a musical note if the coil is fitted with a rapid make and break; otherwise the spark will be of a hoarse sound which is not heard well in the receivers. The Telefunken Co. have designed a rapid make and break for their induction coils, used in the smaller stand-by transmitting outfits. The quenched spark will not work well on alternating current supply of ordinary low frequencies, where the transmitter is excited by a high voltage transformer. For use in commercial stations the Telefunken alternator is generally built for a frequency of 500 cycles per second, which, through the step-up transformer, gives 1000 sparks per second in the spark gap, so that a musical spark results. Now let us consider and analyse the advantages claimed for the quenched spark discharger. I. A pure wave is radiated, in other words, most of the energy radiated is at one wave length. This is due to the fact that the spark is rapidly quenched so that it is extinguished by the time the oscillations in the aerial circuit have reached their maximum; hence no back transfer of energy can take place from the aerial circuit to the closed circuit through the coupling coils, whether the latter are of-the auto-transformer or tesla transformer pattern. Therefore no damping of the aerial oscillations is caused by the coupling, and the aerial energy oscillates .<

2012, ISBN: 1130690911

[EAN: 9781130690910], Neubuch, [PU: Rarebooksclub.com, United States], Language: English Brand New Book ***** Print on Demand *****.This historic book may have numerous typos and missing … More...

[EAN: 9781130690910], Neubuch, [PU: Rarebooksclub.com, United States], Language: English Brand New Book ***** Print on Demand *****.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: .overhauling the spark units. The larger discs seen in the illustration are of thin copper, placed between each spark unit to radiate away the heat caused by the sparks. The units should be inspected about once in six weeks, as the sparks are likely to wear away the inner edges of the mica insulating washers. Quenched spark gaps, made on the above lines, can be used with induction coil and battery excitation, but will only give a musical note if the coil is fitted with a rapid make and break; otherwise the spark will be of a hoarse sound which is not heard well in the receivers. The Telefunken Co. have designed a rapid make and break for their induction coils, used in the smaller stand-by transmitting outfits. The quenched spark will not work well on alternating current supply of ordinary low frequencies, where the transmitter is excited by a high voltage transformer. For use in commercial stations the Telefunken alternator is generally built for a frequency of 500 cycles per second, which, through the step-up transformer, gives 1000 sparks per second in the spark gap, so that a musical spark results. Now let us consider and analyse the advantages claimed for the quenched spark discharger. I. A pure wave is radiated, in other words, most of the energy radiated is at one wave length. This is due to the fact that the spark is rapidly quenched so that it is extinguished by the time the oscillations in the aerial circuit have reached their maximum; hence no back transfer of energy can take place from the aerial circuit to the closed circuit through the coupling coils, whether the latter are of-the auto-transformer or tesla transformer pattern. Therefore no damping of the aerial oscillations is caused by the coupling, and the aerial energy oscillates .<