This electronic Morse Key for telegraph message transmission was found in an American 1980s amateur radio documentation. The circuit uses TTL technology and must be powered by a 5V voltage.
This oscillator with the CA3130 was obtained from an English publication from 1977. The circuit does...
We found this circuit in a documentation from the 70s. Semiconductors are from the era and can be...
This sophisticated audio compressor was obtained in a documentation from the 70s. The transistors are of...