If you only do a very small amount of silver and gold soldering you
should perhaps consider a 25 dollar bernzomatic butane torch. It is
the model with piezo electric ignition, a removable base, adjustable
air and gas mixture, and a charge/fill lasts up to about an hour of
non continuous usage ( compared to melting a quantity of metal which
requires it be on continuously for about 5-10 minutes at fairly full
"throttle"). They get up to 2400 degrees farenheit ( high enough to
effectively melt silver and gold. Refilling them is far cheaper than
weekly purchases of disposable bottles of propane, MAPP or O2, [ and
a note on the disposable O2 red canister as is available at Lowes,
Home Depots, or other harware and/ or plumbing supply stores: each
bottle lasts about 15 minutes- maybe 20 if its a very 'hit and run’
type job . At 8.97 ( Lowe’s @ East coast currently) to 9.49 ( Ace
Hardware @ East Coast currently) it becomes VERY expensive very
fast. ]
Investing in your own 20 lb O2 tank makes far more sense. They run
between 78-94 dollars initially and fill-ups are about 2-7 dollars
depending on the grade and where you buy the oxygen.Even with the
necessary regulator, it is still more cost effective over a few
months of use than disposable gases.
You may use a propane bar-b-Q type tank with regulator for gas, and
while cleaner than acetylene, safety should be foremost in your
studio when using propane. Unlike other gasses, propane stays low to
the ground being heavier than room air, so it is essential, in my
opinion to turn it off every time you walk away from your bench,
even if its for a short period. A spark from a light bulb or electric
outlet can set off an explosion if it has an unnoticed leak and a
gas explosion = complete destruction of the room-at best! Never the
less, its the most low cost and cost effective way to go.With a
Midget torch, or Hoke brand available at far less cost, higher
quality, longer life expectancy and with far more versatility than a
gentec, or smith “little torch” the money you would save from buying
disposable O2 tanks would quickly cover the set-up…
Again, if you’re just doing a small amount of soldering, a
Bernzomatic hand held is highly efficient and effective. It is also
good if you do demos,teach, travel or as a back up if for no other
reason, until you can get your new space outfitted the way you want
it to be. The safety precautions are also minimized with this torch.
You won’t need check valves, arrestors, “gas-savers”, with the
Bernzomatic hand held but don’t leave it in the sun, or a hot car.
Just one last plus is that if you buy it from a the Home Depot or
Lowes, you can get an extended srevice plan for under 1o dollars
which, if something goes wrong, or is defective beyond the first
year’s original warranty, all you need to do is take the unit back to
the store and it is replaced on the spot…I have replaced one, and
only one time ( because of " operator error " !! ) for cosmetic
reasons… hope this helps somehow. R.E.Rourke