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.
For inductive loads we have the configuration shown in the figure. Note that the optical coupler...
This circuit of an old 1968 magazine aims to synchronize a slide projector with a recording, but...
This circuit can send signals in both the VHF and FMN bands with a range of a few tens of meters. The...