Sorry, this page is not translated yet. Automatic translation used.
The radio battery "DL-3" from 1927 produced the Moscow Electromechanical Plant. '' DL-3 '' single-tube regenerative receiver, with a possible transition to the detector. It is built according to a simple scheme. The adjustment is carried out using a variable-capacity air condenser and a sectioned self-induction coil. Feedback is carried out using a communication variometer rotating in this coil. With a good amateur antenna, the receiver gives a wavelength range from 275 to 1800 meters. The receiver is mounted in the form of a bullet, and its upper panel where all the devices are mounted is hinged to the base of the console and is closed with a special latch. This design allows, if necessary, to open the receiver, inspect it, and in case of malfunction to repair it. Like radio receivers '' BV '' and '' DL-1 '', the receiver '' DL-3 '' can be used as a detector, with a permanent connection of the detector circuit and also allows gradual acquisition of the installation. In terms of sensitivity, the receiver gives the same results as the "BV". Receiver '' DL-3 '' is convenient for work with a double-mesh lamp, for which it is equipped with a special cord, with tips for switching on the terminal of the second grid. The price of the radio is 40 rubles.