We found this circuit in the November 1984 Radio Electronics magazine. The base frequency is given by C1. The power supply can be between 3 and 12 V.
This circuit is ideal for recovering vinyl media with a linear response from the RIAA curve of the...
Some delicate sensors such as reed-switches and even sensors made with small metal plates do not...
This circuit was obtained in a manual for radio amateurs from 1975. It is a circuit that allows the...