Author Topic: Soldering DIN connectors - Solder will not tin --Any tips?  (Read 1537 times)

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Offline jstarr

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Soldering DIN connectors - Solder will not tin --Any tips?
« on: December 30, 2016, 02:59:21 am »
I have been struggling to solder DIN 8 pin microphone connectors.  Admittedly I bought these from a variety of unknown vendors on Ebay and I cannot get the tiny hollow wire sockets to tin or to hold solder.  I am using a fine tip medium power iron with Kester 60/40 tin-lead.  I tinned the wires and tried to use a liquid flux on the DIN socket holes but the the solder just wont bind to the DIN wire hole.  I insert the pretinned wire into the hole, apply heat to the either the wire or the socket hole and try to flow some solder.  My iron temp is around 325C.  If I spend to much time the DIN plastic melts.  Would I have better luck with a low temp solder- are they better at wetting these kind of metal surfaces?

happy new year...
john
 

Offline Fortran

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Re: Soldering DIN connectors - Solder will not tin --Any tips?
« Reply #1 on: December 30, 2016, 03:13:28 am »
My guess is that your problem is either oxide, too small tip, or not enough wattage. You shouldn't need to go above 300C.
Try scraping/roughing the sockets first and see if the solder flows then.
 

Offline ataradov

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Re: Soldering DIN connectors - Solder will not tin --Any tips?
« Reply #2 on: December 30, 2016, 03:33:23 am »
1. Scrape the surface. Chinese manufacturers like to apply this shiny coating that does not wet properly.
2. Insert the connector into a spare receptacle. This removes some of the heat from the other side of the connector and keeps pins in alignment, so connector can survive slightly higher temperatures.
Alex
 

Offline neil t

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Re: Soldering DIN connectors - Solder will not tin --Any tips?
« Reply #3 on: December 30, 2016, 03:37:51 am »
either oxide or a oily coating (manufacturing process) most likely perhaps run a jet file/cleaner or fine rats tail file and plenty of cleaner/ isopropol or pcb cleaner
hope this helps.
 

Online KL27x

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Re: Soldering DIN connectors - Solder will not tin --Any tips?
« Reply #4 on: December 30, 2016, 05:52:31 am »
Forget the wire, for now. Try fluxing and tinning just the solder tail, alone, first. Until you can do that, you won't get anywhere. Turn UP the temp, if you need to. All the way to 400C! You need to get it to temp faster to not melt the plastic.

Also RA flux. Not the low solids no clean stuff, which is no clean due to barely doing anything.
« Last Edit: December 30, 2016, 05:54:19 am by KL27x »
 


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