| 单词 | crystal detector |
| 例句 | “We’ve made crystal detector sets and vacuum tube sets, and——” “And other sets that we never knew just how to describe,” interrupted the irrepressible Herb, with a laugh. The Radio Boys at Mountain Pass The Midnight Call for Assistance 2012-01-02T03:00:17.697Z "Connected to the aerial and the earth, with a crystal detector in series, it is only a matter of applying an ordinary photo-recording drum, and the machine is made." The Social Gangster If you understand how the audion works as a detector you will have no difficulty in understanding the crystal detector. Letters of a Radio-Engineer to His Son As a general rule, the radio-listener's first receiving set uses a crystal detector. The Automobile Storage Battery Its Care And Repair The invention of a new type of self-recovering electric receiver made of galena was the fore-runner of application of crystal detectors for extending the range of wireless signals. Sir Jagadis Chunder Bose His Life and Speeches The 'phone receivers and the crystal detector will have to be purchased as well as some of the accessories, such as the copper wire, pulleys, battery, switches, binding posts, the buzzer tester and so forth. Radio Boys Cronies Or, Bill Brown's Radio Numerous important inventions such as the crystal detector, the oscillating valve, the triode valve—have been due to private or amateur work. The Dawn of Amateur Radio in the U.K. and Greece: a personal view The crystal detector consists of some mineral crystal and a fine-wire point, usually platinum. Letters of a Radio-Engineer to His Son He and the doctor donned head phones, and Mr. Brandon manipulated the tuning coil and the crystal detector with a deftness that spoke of long experience. The Radio Boys' First Wireless Or Winning the Ferberton Prize Don't expect to get as good results with a crystal detector as with a vacuum tube detector. The Radio Amateur's Hand Book A Grid Leak Amplifying Receiving Set With Vacuum Tube Detector.—A better amplifying receiving set can be made than the one just described by using a vacuum tube detector instead of the crystal detector. The Radio Amateur's Hand Book The waves radiated by this transmitter can be received by either a crystal detector or a plain vacuum-tube detector but the heterodyne receptor will give you better results than either of the foregoing types. The Radio Amateur's Hand Book The crystal detector gives us much the same sort of a current as does the vacuum tube detector of Fig. Letters of a Radio-Engineer to His Son For this reason a crystal detector is sometimes called a rectifier, which it really is. The Radio Amateur's Hand Book BATTERY, BOOSTER.—This is the battery that is connected in series with the crystal detector. The Radio Amateur's Hand Book This set is built up exactly like the crystal detector described above and shown in Fig. The Radio Amateur's Hand Book The receptor for wireless telegraphy and telephony is the same and may include either a crystal detector or a vacuum tube detector, as will be explained presently. The Radio Amateur's Hand Book Connect it into your secondary circuit instead of the crystal detector. Letters of a Radio-Engineer to His Son The crystal detector is the cheapest and simplest, but it is not as sensitive as the vacuum tube detector and it requires frequent adjustment. The Radio Amateur's Hand Book Don't use a wire larger than No. 80 for the wire electrode of a crystal detector. The Radio Amateur's Hand Book A crystal detector can be used with or without a battery while the vacuum tube detector requires two small batteries. The Radio Amateur's Hand Book This price also includes a crystal detector, an adjustable tuning coil, a single telephone receiver with head-band and the wire, porcelain insulators, lightning switch and ground clamp for the aerial wire system. The Radio Amateur's Hand Book You will need a crystal detector–I should try galena first–and a so-called “cat’s whisker” with which to make contact with the galena. Letters of a Radio-Engineer to His Son Assembling Your Own Receiving Set.—In this chapter we shall go only into the apparatus used for two simple receiving sets, both of which have a crystal detector. The Radio Amateur's Hand Book Don't expect a loop aerial to give worthwhile results with a crystal detector. The Radio Amateur's Hand Book The tuning coil, variable condenser, fixed condensers, crystal detectors and head-phones are exactly the same as those described in Set No. 2 in Chapter III. The Radio Amateur's Hand Book Don't be discouraged if you fail to hit the sensitive spot of a crystal detector the first time—or several times thereafter. The Radio Amateur's Hand Book Whatever voltage there may be across the condenser of this circuit is applied to the crystal detector. Letters of a Radio-Engineer to His Son Don't try to use a loud speaker with a crystal detector receiving set. The Radio Amateur's Hand Book Then place the variable condenser, the rheostat, the crystal detector and the binding posts for the head phones in front of and in a line with each other. The Radio Amateur's Hand Book As the electrolytic detector was cumbersome and required a liquid, the crystal detector which came into being shortly after was just as sensitive and soon displaced the former, even as this had displaced the coherer. The Radio Amateur's Hand Book The oscillations then flow through the closed circuit where they are rectified by the crystal detector and transformed into sound waves by the telephone receiver as described in connection with Set No. 1. The Radio Amateur's Hand Book Our crystal detector produces the same results so far as giving us a steady component of current to send through a telephone receiver. Letters of a Radio-Engineer to His Son With a crystal detector receiving set you can receive either telegraphic dots and dashes or telephonic speech and music. The Radio Amateur's Hand Book |
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