The Detector Receiver with Your Hands

The article will be fully investigated crystal set, its main components and the possibility of upgrading this simple device. For the normal functioning of the receiver requires careful selection of elements from the parameters. But he is very picky about the design of the antenna and the ground, as the receiver is no power supply. It works solely through the electromagnetic field generated by a radio transmitter. This is both an advantage and disadvantage of the radio, collected under the scheme. Work it can virtually forever as long as they broadcast the radio. But the sensitivity is extremely low, and is able to take only very strong signals.

Special requirements apply to the construction of the antenna. It was she who performs in a detector radio power supply function. Hence it is possible to conclude that the use as a detector receiver power supply is quite simple. But there are some shortcomings, which will not get rid of. In particular, the output voltage is very low, even if the radio is tuned to the frequency of the transmitter signal. In other words, you will not collect a lot of potential antenna. However, it should ensure the stable operation of the device. For this purpose, we use several types of antennas, but the most popular and simplest is the "long beam."

At a height of not less than three meters has to hang the wire segment. Its length should be not less than ten meters. It is desirable to use copper wire in insulation varnish (Note: this must be applied precisely later in the inductor). Wire thickness greater than one millimeter. As you can imagine, it will be suspended in two places, the edges must be sealed. Otherwise, all the energy will go into the ground. Conduct insulation best with ceramic elements. Wire reduction is done from one edge of the antenna, is soldered securely to the web at a distance of 30-50 cm from the end. BTW, you can select the aircraft radio receiver kit at Banggood. Besides, you can easily get other electrical accessories (e.g. 12V gear motor high torque) there with high quality and reasonable prices.