On 23 Jun 2005 15:16:48 -0700, "crb" wrote:

I always end up with a loud and unsettling high-pitched
POP as the flame extinguishes.

You may be shutting things off a bit too abruptly. There should be a
pop, but it shouldn't be "loud" with a welding nozzle.

I'm not familiar with MAPP, but with some of my bigger oxy-propane kit
I wear ear defenders. If one of those pops, it's loud enough to hurt!