Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => AmpTools/Tech Tips => Topic started by: PRR on March 12, 2023, 06:42:25 pm
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“Hand Soldering” is a 1944 US Office of Education black-and-white training film providing theories of soldering including how to prepare soldering irons and torches, how to clean and prepare the works, and details on how to fasten joints, solder wire and lug joints, as well as ways to seal seams. Opening with an explanation of what is soldering and a scene of a worker in action, the film features an animation (mark 01:10) detailing the changes occurring to metal during the process. Various types of soldering irons and solder (a fusible metal alloy used to create a permanent bond between metal workpieces) are introduced at mark 02:37 while a factory worker is shown properly securing a soldering iron before going to work. The film continues as workers perform various tasks with soldering irons as the narrator offers detailed explanations for each step of the process. Near mark 08:00 we’re presented with safety tips such as the importance of wearing safety glasses, when to wear gloves, and how to keep an iron in a safety cage when not in use, as those steps also play out on the screen and additional soldering techniques are illustrated. Methods for soldering with a torch play out starting at mark 11:09 and continuing through the end of the training film.
YouTube (https://youtu.be/wvl_KYif9zA?t=29)
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I always got a kick out of seeing the tinsmiths in Sturbridge Village making those pierced tin lamps with no electricity. Fire heated irons.
The side bar on youtube then lead to this film where we learn proper PCB soldering to NASA spec in the later 50's.
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