This question of yours gets asked often, and it’s a good one. The
torch you are using has limitations. Most do. Being that it uses
only propane, it won’t generate as much heat as a propane and oxygen
torch. If you are only soldering small bits of silver, your torch
may be hot enough for you to melt silver solders. However,
remembering that silver is a highly heat conducting metal, it will be
sucking away your torch heat as you work. For this reason, you will
need to heat more of your silver and with a higher heat to get your
solder to melt.
For some reason, many people buying a torch for their studio will
buy the smallest (safest?), simplest (single gas?) easiest (portable,
hand-held?) and cheapest torch to do their soldering, annealing and
melting with. They will perform certain limited tasks, but not
everything you might want them to do.
I’d suggest buying a propane/oxygen torch, like a Meco Midget. By
changing out tips and adjusting pressure on the oxygen regulator, you
will then be able to solder the finest chain or even melt platinum
with it. In other words, there isn’t much you won’t be able to do
with a torch with that much heat potential and a variety of tips.
Many of us who make jewelry in a professional shop or teaching
facility have a number of different kinds of torches for different
jobs. So unless you have the money to buy a variety of torches to do
tiny repairs, solder large bracelets, or melt many ounces of silver,
I’d suggest a torch that has a wide potential of uses in the studio.
A propane/oxygen torch will fit the bill, I think.
Expect many different viewpoints on the subject of torches. Everyone
has their own personal take on what they prefer. Honestly, it’s what
works best for your particular needs and limitations.