This circuit was found in documentation from the 1970s. However, it can be implemented with modern transistors such as 2N2222 for Q1 and BF494 for Q2. The crystal depends on the desired frequency.
The standard lamps consist of features of great importance for the test and repair bench. It is...
This good power amplifier was found in a Japanese magazine from the 1970s. The circuit uses...
This circuit for incandescent lamps was found in a 70s documentation. The circuit uses an SCR...