The first burner worked very nicely. I was able to melt some more of my aluminum pot lid. However, the gas canisters for the hand torch do not last as long as I would like. So I did a little more searching and came up with this, a 10kg propane tank.
I also got a regulator for it. It is rated for 30kPa to 300kPa. After a bit of experimentation, I found that I don't really need a whole lot more than the minimum for my setup (the needle doesn't even move off the "0"). I am still waiting for my flashback arrestor which ought to make things a little safer. The hose is a 3m propane gas hose with an inner diameter of 9mm.
My biggest problem was trying to find a way to connect the burner up to the gas hose. I looked all over for little pipe connectors, joints, etc., but couldn't really find anything appropriate (and cheap enough). There are a lot of parts for air, but each of the packages warns that they are not for use with petroleum based gas.
In the end I decided I could just make something. The filler metal that I brazed my other burner with says that I can also braze brass (flux necessary, though). I got a little container of flux and tried to braze brass. It didn't work so well. The filler just beaded up and fell off. To be fair, the package did say that brazing brass was "difficult". I suspect that I didn't heat things up enough for the filler metal to take hold. So, I went back to copper.
Rather getting and drilling some more galvanized pipe, I just reused the parts from my first burner. I had to widen the hole through the reducer to allow the crimped end of the copper tube to go through.
[The image shows my second generation copper tube for the gas tank burner. The single 6mm tube was pretty weak and bent easily. This time I slipped a 7mm tube over the 6mm one before brazing. I cut out a little hole first where I later drilled the gas oriface.]
