This small commercial radio for the MW band with germanium transistors was found in Japanese documentation from the 1960s. The circuit is powered by a 9 V battery and has a 455 kHz IF.
This circuit is from an article in the December 1988 issue of Radio Electronics magazine that...
This circuit generates a 2 W sinusoidal signal using the Wien bridge configuration. We found this...
The circuit show and simulated in the MultiSIM BLUE is a high pass filter using a 741 operational...