Settings like to this can be found elsewhere in this section. This was found in an American documentation from the 70s. The integrated parts used are from that time.
The TDA2613 is the mono version of the TDA1521A and has pinouts compatible with an integrated...
This circuit from an old 1978 publication uses germanium transistors but can be implemented with...
This project shows how to use an SCR in a starter circuit for a common fluorescent lamp. The SCR...