Allied Radio Knight-Kit Crystal Set 83 Y 261 Manual - Page 8
Browse online or download pdf Manual for Receiver Allied Radio Knight-Kit Crystal Set 83 Y 261. Allied Radio Knight-Kit Crystal Set 83 Y 261 10 pages.
Print Pagecombined signal is then sent up to the antenna where it shoots out in all directions ac a speed of 186,000
miles per second.
At the receiver, the receiving antenna "picks up" a very small part of all the transmitted signals in the
air. All of the signals "picked up" by the antenna come down the lead-in to the coil on the radio receiver.
The coil with the aid of the tuning capacitor separates the desired signal from all of the rest. The audio
waves must be separated from the radio waves before being applied to the headphones. This process is
called demodulation, or detection, and is performed by the crystal diode.
The headphones change the electrical waves back into sound waves which strike your eardrums.
Actually, the process just described takes place in a period of time so short that it can scarcely be
measured. Practically speaking, the sound of the announcer's voice you hear reaches your headphones ac
almost the same instant it has entered the microphone.
So, during a radio broadcast, sound waves are changed into electrical waves; these are changed into radio
waves; which are changed back into electrical waves, and then back into sound waves. This all happens in
a split second.
ALLIED'S SERVICE FACILITIES
In the event that the kit does not operate properly, please write our Kit Department giving the stock
number and the date of purchase of the kit. Also, describe fully what appears to be wrong. Details as to
which sections of the circuit do not function properly will help us analyze the problem. We may be able to
determine a wiring error or a defective part.