Found elsewhere in this section, this circuit mimics the noise of a steam locomotive. This was obtained from an Electronics Today International of the 1980s.
This circuit was found in a 1960s documentation, providing a 2,000 gain amplified output. | Clique na...
This circuit, found in US documentation, can measure the power of transmitters up to 10 W, given...
Suggested by Maxim in documentation from the 90s, this circuit has its response curve given next to...