Today this frequency corresponds to the end of the FM band. However, in December 1958, when the circuit was published in Radio Electronics magazine it was the frequency used by American satellites.
This incandescent bulb stroboscope was found in the February 1974 issue of Radio Electronics...
We found this circuit in Mullard's 1960s transistor manual. The circuit oscillates at 800 Hz, the...
This amplifier uses an integrated circuit from the 70s, which is no longer common on the market. The...