Solder Prices

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I did the math and the cost of buying that in such a small quantity is over $92 per pound..........................YIKES!

Yes, that's true when any solder is packaged like this. However, it is very handy to hold, and to carry in the field.
Of course, you can make up your own tube dispenser from solder off a 1lb roll much cheaper.
Just find a small plastic tube suitable for this, or buy one tube of solder and keep refilling it from your roll.
 
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Sure, you can't remove it down to the plating. I never tried to do that, just get it clean and smooth.
Remember the metals in eutectic are the same, just present in slightly different proportions.
The old remaining solder will dissolve into the new stuff. Do try to get off the old flux residue, though.

On a related note, do you use added flux when you solder? Or, just rely on what's in the solder itself?
 
On a related note, do you use added flux when you solder? Or, just rely on what's in the solder itself?

Never add flux for thru-hole boards. If it seems you don't have enough flux, maybe you need
a larger diameter solder with more flux inside. Or, the parts are too oxidized.
You may need flux with smt boards, because you'll be using much smaller solder, with less flux in it.
 
On another related note, has anyone ever used Plato tips for their Hakko stations? I have a 936 and probably could stand to get some tips. I just wonder if they'll work as well as OEM Hakko tips? As it stands, I see that I can't even get the 900M tips anymore for my station from Hakko. They're discontinued and have been replaced by some other series.
 
Never add flux for thru-hole boards. If it seems you don't have enough flux, maybe you need
a larger diameter solder with more flux inside. Or, the parts are too oxidized.
You may need flux with smt boards, because you'll be using much smaller solder, with less flux in it.

Old stuff............all through-hole. I don't care for the larger diameter solder, though. Thanks
 
Is there something special about Kester? You can have a pound of Multicore 63/37 20 AWG for $26.30 from DigiKey. I've been using Multicore since 1972. I sometimes have to use Kester and I find nothing wrong with it but also nothing to justify the price.

I find a Metcal soldering iron to be FAR more useful to me. After a Metcal everything else is a soldering tusk.

 
Is there something special about Kester? You can have a pound of Multicore 63/37 20 AWG for $26.30 from DigiKey. I've been using Multicore since 1972. I sometimes have to use Kester and I find nothing wrong with it but also nothing to justify the price.

I find a Metcal soldering iron to be FAR more useful to me. After a Metcal everything else is a soldering tusk.


From what I hear, too, it probably is a better setup. But, I can't justify the cost of a Metcal setup for my limited hobby-type jobs. I bought a Hakko and it works fine for me.

The Kester 63/37 at Parts Express is $5 +change more than the Multicore price you quoted. Granted it's more, but it's not ridiculously more.
 
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The popularity of 60/40 beats me, but try it and see. The 63/37 has no plastic range, and a lower melting point.
The 60/40 is somewhat cheaper. http://www.farnell.com/datasheets/315929.pdf

When this question came up a couple years ago, I happened to be at a meeting with the technical director of Kester (they are owned by the company I work for). The answers to, "Why is there still 60/40 when 63/37 works better?" were:

1. Historical. If 60/40 was specified decades ago, getting a spec changed is a major hassle for very minor advantage. The qualification time and expense are enormous.

2. The viscosities of the melts are different, so 60/40 is used in dip or wave applications where the laydown is desired to be thicker.

3. There is a very slight difference in cost.

Reason 1 was 90% weighting, Reason 2 was 8%, Reason 3 was 2%. 😀
 
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