Hi Dave,
Glad you like the pulse generator
A few comments :
I put the design files are available here
http://people.osmocom.org/tnt/hw/pulse_gen/ , the only mod is the addition of the CC-BY-SA license on PCB.
I didn't put a battery holder directly there because I wanted to mount everything in a tube and the the battery would fit "inline" with the PCB.
Concerning the connector yes, the other type would have been useful for scope testing but it's not easy to find good ones and I had a good BNC female / BNC female adaptor handy ... Also if you want to use it to test cables (Time Domain Reflectometry), it's not an issue if you have the right kind of BNC tee.
The appnote explain what you can tweak, there is also two through holes to connect a long coax (hard line) if you want to have the pulse last longer. Since my scope was only 350 MHz, I couldn't really see what difference several transistors made ... if you have better scope you might be able to compare to locally source transistors ...
PS: Hey, I've seen in the youtube comments some fellow "Louvaniste" (people from Louvain La Neuve where I live) and even from FSA / EPL as well it seems (school of applied sciences at the UCL university I attended).
PPS: btw: "Munaut" is pronounced "Mun" as in "MUNich" and "aut" as in "HOse" (at least that's the closest match I can think of at 1am