Step 1: The Schematic Diagram
The electrode connected to the secondary is not heating.
Increase the value of C3.
The electrode connected to the transistor is not heating.
Decrease the value of R3. If this does not fix the problem replace Q3.
Little or no output and lots of heat, drawing lots of current.
Decrease the value of C2 and shorten air gap in core (transformer covered in next step), check feedback winding polarity. If this does not fix the problem replace Q1 and Q2.
Lamp fails to strike at 12v input, ends glowing brightly.
Decrease the value of C4.
Step 2: Winding the Transformer
Wind the heater winding over the secondary winding. you can start from the top or bottom.
Next insulate with PVC tape.
Then wind the first half primary starting from the bottom to top then sharply fold down back to the bottom.
Now wind the second half of the primary starting from the bottom to top and sharply folding down once again.
Wind the feedback winding the same way then insulate it all with PVC tape.
Insert the cores with a 1mm air gap.
Step 3: The Final Test
Step 4: The Finished Board
Step 5: The Finished Product
The first picture shows it starting and the second shows it on.