This circuit was obtained from a 1980's QST magazine. The circuit can generate 1 to 15 MHz signals with 1 Vpp at 50 ohms load. Used transistors are still common today.
This interesting circuit of the American publication Electronics Handbook Volume XIII 1993 shows a...
This metering bridge circuit uses one power supply only. The operational ones depend on the...
The transistors of this timing circuit may be more modern types such as BC548 and BC558. The...