This circuit was obtained from an 80's Radio Electronics. The circuit decodes “scrambled” or sinusoidal encoded signals by providing an audio signal at the output.
This circuit for light modulated in frequency (FM) operating at 50 kHz was found in a 90’s...
This RF wattmeter was found in an American 1980s documentation. The components are common and the...
Found in an 80's documentation this circuit uses an integrated from the uncommon era today. Other...