This circuit was obtained in a QST magazine from the 90s. The circuit makes use of components that are uncommon today. The circuit includes a gain selection switch.
We found this circuit in an old oscilloscope publication. With it, it is possible to observe the B...
This interesting circuit found in an old documentation uses neon lamp to indicate the percentage of...
This circuit was obtained in an American documentation translated in the 80's. The circuit can be...