This circuit is from a 1965 Motorola manual. It can be implemented with a common 2N2646 and a 106 Series SCR without problems. The pulse transformer has a 1: 1 turn ratio.
This is one of the many possible siren configurations for the 555 integrated circuit. We found it in...
This circuit was obtained from a 1965 General Electric documentation. The components are of the...
This circuit can operate in a 100 dB range with signals of up to 100 MHz frequencies. Similar...