Demolisher

I shall post my questions here, as the hyperlink said ;D 1. What is T2. T2 is discussed at length, but I fail to actually see it on the circuit diagram. 2. How do I wire in the pulse transformer. 3. What exactly is a pulse transformer, and how does it work? 4. What is the arrow pointing straight down between the battery and C2? Hope someone can answer my questions. :)