This circuit uses an amplifier from National Semiconductor, uncommon nowadays. The numbers in parentheses are for the second channel. The circuit is suitable for old tape recorders.
This circuit generates an FM signal of 4.7 or 10.7 MHz for audio signals on analog TV or FM, with...
This simple test for general purpose NPN and PNP transistors was found in a 1974 publication....
This circuit from a Radio Electronics magazine from June 1969 already shows the use of the newly...