I have learned so much more about torches and gas tanks than I
I have been setting my pressure higher at a consistent 3 psi oxy and
5 psi propane since I had the problem, and the erratic flame has
disappeared. I think I am running low on both gases, because I now
notice the high pressure gauge indicating around 500 psi on the
oxygen, and it was higher when I first got it.
The Smith rep at my local welding supply (I didn't buy a Smith, but
talked with the rep) told me about something called D K rise (please
excuse if misspelled). This is a pressure irregularity in the oxygen
as the tank empties.
Anyway my local jeweler also told me, earlier, to get a 2-stage
regulator on the oxygen to avoid this inconvenience. He uses a huge
tank, about 4 feet tall.
I will consider upgrading my regulator but right now I'm just
getting used to using the torch and getting better at accomplishing
what I intend each time. I think I will be okay.
I just finished a brooch, a sterling silver gecko with a copper
squiggle down its back, and bezel-set synth faceted aquamarine eyes.
I am very happy about how it turned out.