With reference to soldering without the use of your torch. Take a
look at your history books and see the jewellery that the Egyptians
made, without the use of gas or electricity, these items were
soldered using a blowpipe and oil lamp, or sometimes a charcoal fire.
When I was an apprentice back in the 60s, I was taught to solder by
means of a long, hooked tapering blowpipe which was held by my teeth,
with the small end in the flame, with this pipe I could solder small
items with the flame of a large candle, all you needed was a two inch
flame and by positioning the tip of the blowpipe in the flame, gentle
blowing gives you a needle point flame, which by manouvering the
blowpipe, can be directed anywhere.The item that I was soldering was
held on a “wig”, which was a bundle of steel binding wire, flattened,
like a small flapjack. The flapjack shaped wire was supported with a
handle underneath, this was to keep your hand away from the heat.
The only difference in the method of soldering was that I had to move
and rotate the item being soldered, as the flame was static. A
process easier to demonstrate than put into words.
I hope the above makes sense.
One last thing, have you tried the small hand size torches designed
for the catering trade.
James Miller in the UK