This circuit was obtained from the April 1978 Radio Electronics magazine. The other circuit is a PLL of the time. The power supply must be 15 V symmetrical.
This circuit, which in our times would be called a shield, can also be used with other loads. The...
This circuit was found in a 90s Popular Electronics. It uses an LS3404 melody chip that has...
This circuit is ideal for recovering vinyl media with a linear response from the RIAA curve of the...