E)
This audio filter was found in the August 1993 issue of Radio Electronics magazine. It cuts low and high frequencies corresponding to rumble and scratch noises that occur on turntables.
We found this circuit in a 1990s documentation. The circuit uses components from the era providing...
This 1968 circuit makes use of MOSFETs of the time. The circuit can be mounted based on modern...
Suggested to power the previous circuit, this power supply was found in the December 1990 issue of...