This circuit for VCR recording heads was found in the February 1990 issue of Radio Electronics magazine. The circuit is use do observe signal in an oscilloscope.
This article is from documentation from the 70s. The original text of A. Fanzeres was kept. In...
In the figure we have the way to use a common operational amplifier for AC signals. The resistor...
We found this circuit in a 1956 documentation from Sylvania. The circuit is for bench testing and...