What you probably looking at with the socket & wires was just a test setup to see if it would work.
Its R2 4.3K or 3.9K? Its been diffrent on the pictures. Can i use both of them? I have get 4.3K 1W! The BC337, its the flat side up?This is my test circuit & the actual values that I used. This is also what i test Ign modules on. It seems to work quite well. Another transistor that does work in these circuits is ST901T. Not all ignition transistors work. Interesting to see how you go using a printed circuit board & SMD components. ( I used to repair electronics TV & VCRs from 1975 to 2010) View attachment 118134View attachment 118135View attachment 118136View attachment 118137View attachment 118138