This equalizer has automatic level control, being designed by Sanyo for cassette recorders and radio. The maximum supply voltage of the LA3210 is 15 V and the typical idle current of 1.4mA.
This small crystal microphone transmitter was indicated in an 80s spy book. The range depends on...
This interesting circuit, found in a 1984 documentation, captures stations in the FM band and...
Of course, with a change in the cable length, the frequency can be changed as long as it is within...