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From this you will see that any regenerative set can be used for 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.
In this way then are the faint incoming signals, speech and music which are received by the amplifying receiving set reproduced and magnified enormously. The Telemegafone is shown complete at B. From the foregoing chapters you have seen that the vacuum tube can be used either as a detector or an amplifier or as a generator of electric oscillations, as in the case of the heterodyne receiving set.
While a heterodyne, or beat, receptor can receive continuous wave telegraph signals an ordinary crystal or vacuum tube detector receiving set cannot receive them unless they are broken up into trains either at the sending station or at the receiving station, and it is considered the better practice to do this at the former rather than at the latter station.
To produce these beats a receptor can use: a single vacuum tube for setting up oscillations of both frequencies when it is called an autodyne, or self-heterodyne receptor, or a separate vacuum tube for setting up the oscillations for the second circuit when it is called a heterodyne receptor. The Autodyne, or Self-Heterodyne Receiving Set.
As far as I can see, all we need is a similar variable electric field of a slightly different frequency to heterodyne theirs into something quite harmless." "Oh," said Devin. "We could, couldn't we? But how are you going to do that?" "We'll have to learn, that's all." Buck Kendall started trying to learn. In the meantime, the Mirans were taking over Jupiter.
The great advantage of using a separate vacuum tube to generate the heterodyne oscillations is that you can make the frequency of the oscillations just what you want it to be and hence you can make it a little higher or a little lower than the oscillations set up by the received waves. The Parts and Connections of a Separate Heterodyne Long Wave Receiving Set.
One of the operators was E. Howard Armstrong inventor of the regenerative detector, super-regeneration and the supersonic heterodyne receiver, though the French claim that the superhet was first designed by Lucien Levy of Paris. The message read: No.1 de 1BCG. WORDS 12. Eight British amateurs had also copied the message correctly.
That one is our master. He can penetrate the impenetrable shield of force and can operate mechanisms of pure force behind it; he can heterodyne, transmit, and use the infra-rays, of whose very existence we were in doubt until recently! While that warning was being delivered he was, in all probability, watching you and listening to you, face to face.
I can heterodyne, combine, and recombine just as though we were watching the actual scene it's more complicated, of course, since I have to follow it and amplify it too, but it works out all right." "This is unbelievable, Dick. Think of actually seeing something that really happened in the past!" "Yeah, it's kinda strong, all right. As Dot would say, it's just too perfectly darn outrageous.
To receive wireless telegraph signals, however, from a transmitter that uses an arc or a vacuum tube oscillator and which sends out continuous waves, either the transmitter or the receptor must be so constructed that the continuous waves will be broken up into groups of audio frequency and this is done in several different ways. The heterodyne method will be described in this chapter.
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