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buserror

Trick to desolder thru holes?

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I've desoldered my thru hole caps, but the hole is now 'full' and no amount of heat and manual desoldering pump seems to help. Do I have to re-drill the center with one of these tiny bits? Seems some of the holes are straight onto a power plane, so they act as heatsink...

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8 minutes ago, dzog said:

Try adding some fresh solder and a bit of flux when heating it up for removal. Braid may also prove helpful. 

Thanks, I do try all of these, add solder, add flux, use 400C on the iron etc etc not much luck. Well i cleared about 2/3 of them using various combination of these, but some are just... tough!

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On 5/22/2020 at 11:28 AM, buserror said:

Thanks, I do try all of these, add solder, add flux, use 400C on the iron etc etc not much luck. Well i cleared about 2/3 of them using various combination of these, but some are just... tough!

I have an 858D clone hot air gun that I use in conjunction with the iron when I have to deal with a ground plane soaking heat up. If the iron isn’t enough, usually adding the hot air will provide enough heat to clear things out. In my experience, copper wick will just soak up even more heat, which is a problem if the ground plane is posing an issue on its own.

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1 minute ago, Michael_b said:

I have an 858D clone hot air gun that I use in conjunction with the iron when I have to deal with a ground plane soaking heat up. If the iron isn’t enough, usually adding the hot air will provide enough heat to clear things out. In my experience, copper wick will just soak up even more heat, which is a problem if the ground plane is posing an issue on its own.

Ah good tip, in fact, excellent idea! I also have hot air so I'll try that next. I've been sulking for a day or so because of that problem so it gives me "options" :-)

 

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I've managed to clear stubborn thru-holes by using a bare piece of solid CAT5 wire. Heat up the thru-hole with hot air, cut a wire out of the cable several inches long, strip it, and pull it straight through. It's helped me get thru-holes clean enough where I can stick other components in.

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