Found in 90s Radio Electronics, this circuit is intended for amplifying analog video signals. Integrated circuits are uncommon today and the bandwidth is 100 MHz.
Found in a 90s 73 magazine, this circuit uses an unusual component today which is the XR2206. |...
This random noise or white noise generator was published in Radio Electronics magazine in July...
This circuit was found in Philips documentation from 1967. The phototransistor is from that time,...