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 low noise, low frequency instrumentation circuit was found in a 1976 NASA circuit manual. The...
In the figure we have an oscillator with a single transistor that can generate signals in the...
This circuit was found in a 1970 Philips documentation. The components are from the time, and...