Instruments based on the radio. Determination of the frequency of an unmodulated source, an external signal. With the help of measuring GS you can configure any radio transmitting and radio-emitting devices in the frequency range 150 — 12 000 kHz, in the CW mode, and the mode AM or IM. In the absence of signal modulation of an external RF source (CW mode), its frequency can be determined by the method of zero beating with the frequency of HS. The block diagram implementation of the method of zero beat is illustrated.
FROM “SPIDOLY” LAB!
When employees of Institute of petrochemical and gas industry named. Gubkin turned in a circle electronic automation of the Moscow Palace of pioneers with a request to produce thermostats for chemical experiments, it is to no one’s surprise. Is not the first creative activities of the children’s team, led by F. Y. Yerokhin, goes jobs scientific institutions and industrial enterprises of Moscow. So this time they decided posed a technical challenge.
To consider, compare, think, manage that work, which are handled by modern computers. With the help of electronic machines is calculated the orbit of the motion of planets, satellites and missiles, the calculated flight speed of elementary particles in nuclear reactors, control machines, production lines, shops and factories. The management of real objects with a computer basically boils down to converting discrete data into a continuous signal. This work is done by auto binary code converters — descramblers. The layout of one of these converters built in school No. 511 of Leningrad. Schematic diagram of the layout in the figure.
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More precisely, one (50 or 65 watts), operating in three modes. Design advantages: constant availability, visual inspection of the three modes, etc. All provide automation. Power consumption in the idle — 15 watts (on L2), in the normal operating — 45 W (L2 and L3), and overheating — 50 W (L3). Changing modes 2 and 3 is made by the switch B1, in standby mode, by overlapping the luminous flux from L1 to K3 with the handle of the soldering iron.
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(The end. The beginning in № 4, 1976) the design quality
More lovers of mushrooms and berries prefer to reach remote treasured areas rich in forest, on their “steel horses”. Leaving the car somewhere under the lush foliage. any tree, fond of “quiet hunt” so much that sometimes lose orientation “in time and space.” And the result is the joy of communication with nature — a tedious search of the vehicle, left unattended.
In high quality stereorelease made on the basis of heads 0,25 GD-10-290 from small radios. Their advantages are a wide frequency range, small harmonic distortion comfortable ear cushions earpads, good isolation from extraneous noise and beautiful appearance.