Preheating that area of the board with ie a hair dryer works wonders, especially the top 2 pin jst connector. The copper pour around the connector makes them harder to solder.
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@benvelvet the TS100 is a great soldering iron, thatās good to hear. The shiny-ness isnāt everything, but it can be a good indication of a quality solder joint. A rough finish joint is harder to inspect and verify itās not a cold solder joint. You can get shiny joints with tin solder, youāll just have to have your technique and temps perfectly dialed in. Leaded is way more forgiving. Itās also more toxic, but as long as you wash your hands after touching it, and donāt put your fingers in your mouth it canāt enter your blood stream. Can also just wear some gloves. The burning flux when you melt solder is something to be more worried about in my opinion
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63/37 is king over 60/40. But Iāve had way better luck using brandname solder vs generic stuff from China, some of the stuff Iāve gotten is borderline unusable!
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The satin finish is common for a lead free joint. Leaded solder has a good indicator where it will be shiny when itās properly heated and dull when itās a cold joint.
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Yes, i ordered leaded solder from china once it was crap(probably lead free). I could not find a big diffrence between 63/37 and 60/40. The integrated flux is way more important (amount and type). Also for me 1mm diameter works best. I tried 0.8mm but thats already to small.
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The big difference between 63/37 and 60/40 is 63/37 is eutectic. Youāre a lot less likely to get a cold joints. And a slightly lower melting point is nice,
Thats interesting, sadly 63/37 is quite hard to find.
How can it have a lower melting point when there is less lead and more tin in it?
Edit: Got it, Tin has a lower melting point than lead, my bad.
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Ahhh damn thatās to bad itās slightly more expensive in Canada but easily available on Amazon. Worth the extra cost in my experience!
This one seems interesting, it almost cost double maybe because of the added silver?
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Hmmm I donāt think Iāve ever seen a leaded solder with silver, not that Iāve looked. Gotta wonder why/what for
@doomy hey didnāt you ship this from cz? I got a damn customs fee from our postal carrier that says itās from a none EU country and they aināt getting any money if I can avoid it cause they are scums ā¦ Want to check before I pay.
EDIT: no idea where I got cz from lol says Swiss everywhere when I look again 
Nwm will have to pay themā¦ damn lol
Oh no, thats too bad. I ship from switzerland, but i declared a really low value (7ā¬ per focer). How can they still cash in on customs fees?
8$ in set fees for handling the package 
3euro 25% tax. Sweden sucks 
worst part is that instead of getting the focers today it will take them another week or two to process it and send it outā¦
Ohh well all I can do it wait even tho its hard
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Iām in Sweden too but my FOCers slipped through customs. Two packages, no handling fees or toll. 
Is anyone from EU still waiting for their FOCers? Iām starting to worry that my got somehow lost by post office.
I just got them on the mail!
Iām from Poland and also still waiting for my FOCerā¹ļø
Some of the national post services seem to be very slow (2-3 weeks) so far they seem to be portugal, poland, danmark and all oversea countrys.
The packages always arrive very quick (3-5 days) in germany and the netherlands.
Spain, france, sweden and belgium take around 5-10 days.
I have 8 tested focers with imu left for sale if anyone is interested.
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I received them. I am from Romania.
The postman threw them over the gate, i thought iāll have a nervous breakdown.
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