460. Self-Heterodyne Receiving

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460. Self-Heterodyne Receiving

The Autodyne, or Self-Heterodyne Juicy Couture Outlet Receiving Set.-Where only one vacuum tube is used for producing both frequencies you need only a regenerative, or feed-back receptor; then you can tune the aerial wire system to the incoming waves and tune the closed circuit of the seeondary coil so that it will be out of step with the former by Juicy Couture Bags 1,000 oscillations per seeond, more or less, the exact number does not matter in the least. From this you will see that any regenerative set can be used for Juicy Couture Sale autodyne, or self-heterodyne, reception.The Separate Heterodyne Receiving Set.-The better way, however, is to use a separate vacuum tube for setting up the heterodyne oscillations. The latter then act on the oscillations that are produced by the incoming waves and which energize the grid of the detector tube. Note that the vacuum tube used for producing the heterodyne oscillations is a generator of electric oscillations; the latter are impressed on the detector circuits through the variable coupling, the seeondary of which is in series with the aerial wire as shown in Fig. 74. The way in which the tube acts as a generator Juicy Couture Handbags of oscillations will be told in Chapter XVIII.IN the first part of this book we learned about spark-gap telegraph sets and how the oscillations they set up are damped and the waves they send out are periodic. In this and the next chapter we shall find out how vacuum tube telegraph transmitters are made and how they set up oscillations that are sustained and radiate waves that are continuous.