The transistors were already at the limit of what steady hands and tiny tweezers could handle. So, scientists wanted to make a whole circuit -- the transistors, the wires, everything else they ...

[Martin] seems to have a knack for locating lightly damaged second-hand audio gear ... The multimeter showed them as an open-circuit, indicating that they had likely been burned.

As a piece of work it’s a deceptively straightforward yet extremely fiddly piece of soldering that requires a steady hand for even the most skilled of solderers. What takes it beyond the norm ...