This circuit has a sensitivity of 2uW. We found it in documentation from the 1980s. The integrated circuit is from that time. Equivalents can be tried.
This bench power supply was found in Radio Electronics magazine from February 1962. The...
With a 22 V symmetrical power supply this amplifier provides 15 W of output power with excellent...
This circuit was found in an old publicatio n from the year 1958. The circuit controls an external load by...