This is a channel of a stereo amplifier and small power with the LM386 suggested by the Radio Electronics Experimenters in the 1981 edition. The power of a few Watts.
This circuit is from a July 1970 Radio Electronics magazine. The sensors are metal probes. The 18 V...
This commercial medium and short-wave radio was manufactured in Japan in the 60s. The circuit has...
General Electric suggests this circuit in an 80's documentation. The circuit makes use of PUTs...