What you want is called brazing, not soldering, and it will cause the silvering of the parts to be burned off so you'll have to re-silver it (assuming a silver plated trombone).
After reading this page, I think my answer is 'not much'!
Hmm. News to me - I've never heard this before. Got any references on that? Annecdotally I can only think of one person I vaguely know who liked playing keyboards. Again annecdotally one of my parents is a professional musician so you'd imagine some of that would run off and perhaps I'd be more likely than the average to be musically inclined having grown up in a house full of instruments and music, yet I have absolutely zero interest or inclination.
Sure people listen to music a lot, but never seen any other connection beyond that?
I'm currently working as a software engineer, but I made my living as a musician (jazz, blues, piano bar) for several years.
I could see jazz especially being interesting to tech folks. There's a fantastic mixture of theory and logic and puzzle-solving mixed with creativity and expression that meshes very well with hacker culture, at least to me. I personally know quite a few people who are into both.
It's also something that can be largely self-taught, which mean a lot of the people who are into it are into it because they're passionate about it.
Coding video tutorials - never understood it. Car repair video’s: very hard to follow because most of the time the lightning is bad and the camera is shaky. A few good pictures with descriptive text. Perhaps a movie if you have to do something which requires a specific kind of move.
That said: instruction movies about sports are pretty useful.
There are no advertisters paying for anything, and yet the content exists and is available.
If there was such a thing as "free" content on the web then this page seems to represent that idea better than the pages of today.
While today's pages may be more technically impressive by showcasing browser "features", they also pose more potential risk to users on several fronts. There is a cost.
I'm restoring a 25 year old car, and discovered that new heater cores for it are no longer available. Both my original and the used spare I got were crushed on the tube ends (from people using vice grips to remove stuck hoses). I never had much luck reshaping aluminum or brass, but I had recently read about the process of annealing (which restores plasticity to a work-hardened metal piece) so decided to give it a try. (As for how someone can be in the habit of attempting to reshape metal and NOT know what annealing was: such is the life of a self-taught DIYer.)
I used propane with a turbo-torch tip to heat the ends of the brass tubes cherry red, and let them cool. Then, in a process very similar to page 2 on the linked website, I used an internal mandrel (a thick steel pin) and gentle taps with a flat hammer to reshape it. It was amazing to see the capital letter "B" shaped crushed tube ends become round again. The first few strikes move the metal easily; after that each tap makes the metal harder. I could fix any mistakes by re-annealing and starting over.
It's interesting that a lot of people would be surprised at just how fragile a brass instrument is, given that the things they usually have experience with which are made of brass are much stronger --- plumbing, doorknobs, etc; you really have to experience one in person to feel the thinness of the material (and they're already pretty heavy, which makes them even more fragile.)
He has no competitors. Good instrument repair technicians are pretty rare. These guys could be making a lot more money repairing things like high-tech medical equipment.
Context: This site was linked in a comment the other day in the "Lesser-Known Search Engines That Are Worth Checking Out" thread . It's a search engine for "old internet" style sites such as this one, and the S/N ratio is so high they even have a "surprise me" button that more often than not gets you something interesting.
In a way, it has the effect of being something like "AMP" before that project was started: a way to encourage or filter for smaller, faster webpages (but even better, without the injected advertising).
On the other hand, if you don't restrict your search to "instrument-oriented" suppliers...
Now I wonder if anyone has made a trombone (or other brass instrument) from plumbing supplies. That would be more in line with the "hacker spirit"!
: https://pbone.co.uk/ I think the only non-plastic bits are the spring and a cotter pin that make the spit valve work