This 1970 Electronic Design circuit uses a varactor or varicap. The circuit divides the frequency of a 150 MHz signal by 2. Similar versions appear on this site.
This amplifier for effects on musical instruments can be mounted with BC549 transistors. The...
This circuit was found in documentation from the 1980s. The circuit uses several components of the...
The presented circuit can use an equivalent transistor like the BC548. The configuration, which [is...