lost_and_confused:
PG,Couple of things:
As far as I know, SCR's aren't "Conducting at startup". They need a signal on their gate to start them conducting.
Also, I didn't know SCR's do current limiting.
They are ON or OFF.
I have bashed a couple of thoughts out but haven't tried them as similar to the origina circuit.
Few components and SHOULD work.I can try to make a JPG of the schematic if you are interested. But it is really difficult to make drawings with the programs I have at hand.
SCRs or thyristors turn on when when there is current from the gate OR when the rate of change of voltage is high enough (due to internal
capacitance). Simply connecting the supply might trigger conduction due to the sudden increase in voltage.
And yes you are right they don't do current limiting other than via melting!