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Updated: June 12, 2025
I should have known that with all the light frequencies in heterodyne for visibility, enough of that same stuff would leak through to make strong medicine on these visiplates for I knew that that bar weighed a hundred tons and would liberate energy enough to volatilize our Earth and blow the by-products clear to Arcturus. How're you coming, Dunark? See anything yet?"
In using either of these heterodyne receivers be sure to carefully adjust the B battery by means of the potentiometer. Wireless Headphones. A telephone receiver for a wireless receiving set is made exactly on the same principle as an ordinary Bell telephone receiver.
What the Heterodyne or Beat Method Is. The word heterodyne was coined from the Greek words heteros which means other, or different, and dyne which means power; in other words it means when used in connection with a wireless receptor that another and different high frequency current is used besides the one that is received from the sending station.
Where it is not possible to put the aerial up a hundred feet or more above the ground, you can use a lower one and still get messages in International Morse fairly strong. The Parts and Connections of an Autodyne, or Self-Heterodyne, Receiving Set. The Separate Heterodyne Long Wave Receiving Set.
In music a beat means a regularly recurrent swelling caused by the reinforcement of a sound and this is set up by the interference of sound waves which have slightly different periods of vibration as, for instance, when two tones take place that are not quite in tune with each other. This, then, is the principle of the heterodyne, or beat, receptor.
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.
But their valley forces were getting out of alignment a bit by now, owing to our heterodyne operations. I ordered our swoopers, of which we had five, to sweep along above these ridges and destroy the Han batteries. Up in the higher levels where they were located, the Hans had little cover. A few of their small rep-ray ships rose to meet our swoopers, but were battered down.
This is the simplest type of heterodyne receptor and it will receive periodic waves from spark telegraph transmitters or continuous waves from an arc or vacuum tube telegraph transmitter. In this type of receptor the detector tube itself is made to set up the heterodyne oscillations which interfere with those that are produced by the incoming waves that are a little out of tune with it.
In the heterodyne, or beat method, separate sustained oscillations, that are just about as strong as those of the incoming waves, are set up in the receiving circuits and their frequency is just a little higher or a little lower than those that are set up by the waves received from the distant transmitter.
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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