High altitude soldering

David Thank you for your reply. We presently receive funding from
the UN and the Govt of Finland. Our funding is adequate, however
because of the remoteness of the location (no electricity or
motorized vehicles technologies based upon electricity or
petrochemicals) high tech solutions perhaps not work for the
near future. I am afraid that if we do set up a generator nobody
will be able to maintain it and then all jewelry making will
come to a halt. Hydrogen and oxygen is a good idea does the
torch rely upon electricity can it be powered by a solar cell
and how much does a unit cost.