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.
This circuit, which can act as a shield, is from old documentation, using a DAC of the time. Next to...
This is the circuit of a commercial radio from the 60s, sold in Japan. The circuit shows the...
This circuit is a source that allows antenna boosters to be powered by the signal cable itself, as shown...