Which burner for a small meltting/heat treatting ? T-Rex?

[PekkaNF]

Hello,

I was once trained by a gun-smith to make some knife blades and other woodworking tools and I have Sievert/Primus torches which I use for silver soldering and hardening.

However, they are a bit marginal for melting any quantity of bronze or bearing metals. My need is not big (pretty sure 90%+ would be around 100-300 gr of bearing metals or such.

Will 3/4" T-Rex be the ideal one?
http://www.hybridburners.com/products.html

Or would it be only marginal improvement over sievert? I have bit like this and some burners:
http://www.shesto.co.uk/Soldering-&-Brazing-Sievert-LPG-Gas-Torches-&-Burners-Pro-86/88-Classic-Torch-System-Handles/c50_52_190_348/p1151/Sievert-Pro-88-Handle-with-Economiser-%28Pilot%29/product_info.html

Pekka

[doubleboost]

With the experiance i have had with propane burners buy or make the biggest you can .
You dont have to run it at 100 %
They are not difficult to build
John

[stovebolt]

 I use a Ron Reil type burner for heat treating and aluminum casting.  The one I'm using now is similar to the style shown on the  hybridburners URL , using a mig welder tip. 

 A couple of web sites to look over, 

http://metalcast.boorman.us/reil_1.html

http://www.myheap.com/chapter-2-tools/a-reil-type-propane-burner.html

http://ronreil.abana.org/design1.shtml

http://www.google.com/search?q=ron+reil+burner&hl=en&tbo=d&source=lnms&tbm=isch&sa=X&ei=-AizUJrdIunsigLH-IGgDA&ved=0CAcQ_AUoAA&biw=1024&bih=653