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An alternative method for soldering through-hole components

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David Hess:

--- Quote from: tooki on March 14, 2019, 09:29:18 pm ---Many cheap components use tinned steel leads. Take a magnet to them sometime, you'll be surprised. Similarly, see how some rust...
--- End quote ---

Kovar and alloy 42 are also magnetic.

tooki:

--- Quote from: David Hess on March 15, 2019, 01:13:17 am ---
--- Quote from: tooki on March 14, 2019, 09:29:18 pm ---Many cheap components use tinned steel leads. Take a magnet to them sometime, you'll be surprised. Similarly, see how some rust...
--- End quote ---

Kovar and alloy 42 are also magnetic.

--- End quote ---
Sure, but how often is one soldering those to a PCB??

David Hess:

--- Quote from: tooki on March 15, 2019, 02:18:01 am ---
--- Quote from: David Hess on March 15, 2019, 01:13:17 am ---
--- Quote from: tooki on March 14, 2019, 09:29:18 pm ---Many cheap components use tinned steel leads. Take a magnet to them sometime, you'll be surprised. Similarly, see how some rust...
--- End quote ---

Kovar and alloy 42 are also magnetic.
--- End quote ---

Sure, but how often is one soldering those to a PCB??
--- End quote ---

Ever solder a 1N4148 diode or a film resistor?

Axial power diodes use pure copper leads for lower thermal resistance even in glass packages.

The only time I have run across steel leads which rusted is with cheap power resistors.

MarkF:

--- Quote from: austfox on March 14, 2019, 11:19:58 pm ---Wow, 11 minutes in and he’s still on the first resistor. He should be finished that board by 2021.

--- End quote ---

We now know why it costs so much to send anything into space.  Of course, repairs are pretty much impossible.

There are a few other NASA soldering videos if anyone is interested.

intabits:
Of course I expected my video to elicit some negative comments, but I was surprised to see almost *only* negative comments.
Surprised, because this is a good method, and one that I see no negative downsides to.

The advantages I mention (assembly speed, better contact area, smooth result, protection from oxidation, reduced shock stress), are all true.

Some comments indicate that I may not have gotten my point across clearly, for example that the lead barely protrudes past the hole and/or that the lead is buried under a blob of solder and thus good contact with the solder cannot be assured. No, there is ample lead exposed to the solder, and an observable solder fillet, indicating good wetting, is formed:-



On the subject of removability, the video shows how easily I removed the resistors soldered in what I termed the "bad way". Not to mention, the part being removed is likely suspect anyway, and causing damage to remove it (if required) should not be a problem, especially for cheap parts like resistors.

I concede that the video title may be somewhat misleading and presumptuous (though not actually incorrect) and will change it to "An alternative method for soldering through-hole components". (and the subject/title of this thread also)

To the criticisms relating to the more general aspects of video production (length, quality, etc), I say "Let he who makes perfect YouTube videos cast the first..."

The PACE soldering videos mentioned above are indeed excellent. In places their examples have clinched leads as I advocate, though I cut them shorter than they show (which would make removal easier). 

And finally, I say "don't knock it 'till you've tried it".
Almost everyone will have a never-to-be-used PCB lying around, and be able to sacrifice a dozen resistors for science.
Please try out what I've described, and see if I'm full of crap...

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