This is a commercial circuit from the year 1958. Transistors are germanium types and transformers and coils are hard to fild today. The circuit is destinated to the reception of medium wave stations.
The transistors of this timing circuit may be more modern types such as BC548 and BC558. The...
Using the 4046 PLL we found this circuit in the December 1989 Radio Electronics. The circuit...
This circuit is designed to trigger a xenon lamp from a switch. The circuit was found in the May...