_Fnord wrote:It takes 10000 volts to jump one cm at normal air pressure. Those capacitors hold 500-600 if you're lucky.

If you were to wire the capacitors thru a ignition coil from a car would that not increase the output?

Cool thanks guys, I also feel they should be as loud as you can get them.

Will any ignition coil work for this set up or is their a certain one that i should get.

thanks kris

thanks for the info guys, i think i am just going to go with 8 ft, that way i can still move it around without having to take it apart

that would make it like 8 ft correct or did i do the math wrong

sorry i am using a 2" barrel

If I use a 4" piece of PVC that is 2 feet long what is a good length for the barrel.

thanks kris

just wanted to say hi to everyone first time on the site and looking around I see allot of things I know nothing about cant wait to start learning I have built 3 guns so far nothing special but am wanting to take it further just want to keep it simple any help or plans would be great my current gun ...