This 10 A solid state relay was found in a 1980s documentation. It can work as a shield and implemented with modern equivalent transistors.
The purpose of this circuit is to convert a rectangular pulse into a sharp pulse for triggering an SCR. The...
In reality what we have is a microphone amplifier that works with 4 batteries and a magnetic...
) These two circuits were obtained in a 1977 Radio Handbook. The transistors are from that time,...