This digital to analog converter circuit was found in the March 1980 Radio Electronics magazine. The power supply should be symmetrical, and the digital controls can be TTL.
The integrated circuit used is a double 741 from SGS. The transformer is the critical component of the...
We found this treble booster circuit in a Radio Electronics magazine from February 1970. It uses...
We found this circuit in a 1967 American documentation. The diodes are general-purpose and the...