Although it uses a dual-channel FET, which is hard to find today, this circuit was released in a Radio Electronics issue in April 1986. It serves as a signal booster for a wide range of frequencies.
This circuit was originally designed for testing crystals used in color televisions, but it works...
This circuit was found in the February 1995 issue of Electronics Now magazine. It can double the...
The figure shows how to use an LM3914 with a variable range moving point. The circuit has an...