In this circuit R1 is 56 ohm and R2 is 220 ohm for the 110 V network. SCRs are according to the load. We found it in Philips 1968 documentation.
September 2016 - It can be purchased from Mouser Electronics the new rectification controllers...
The frequency of this oscillator depends on the capacitors, being able cover the range between 1...
The circuit is from a June 1995 Electronics Now. The relay is power-dependent and both R1 and R2...