Re: K1 U2 extraction help!

Posted by AD6XY on
URL: http://elecraft.85.s1.nabble.com/K1-U2-extraction-help-tp3537980p3671727.html

You probably made the best choice for you. If the chip is cheap - which it is just cut the pins and remove individually.

It is fairly easy to remove such a chip using hot air or thick tinned copper wire. You need to be careful with hot air but if you mask off the rest of the board with a piece of aluminium with a hole in it to view just the pins and heat from the bottom you can heat all pins at one and the chip will drop off. I have used this technique many times but usually I am interested in salvaging the component and not the PCB. If you get it too hot you can burn the PCB. I have an SMD hot air cun that makes this operation very easy. I assume you don't have one - so perhaps best to not try.

The other way is with copper wire. Solder a thick piece of copper wire to all the pins at the base. Small piece of copper shim wold do as well. Then heat this with a hot iron so all the solder for all the pins melts. The chip will drop out.  

I wish elecrat would start to go on the SMD route. Removing SMD components is much easier. When you learn how the larger sized SMDs so are much easier to work with than leaded parts.

Mike

Gary W. Marklund wrote

Thanks to all that replied on and off list. I've tried a wick and the RS
solder sucker and have the bottom clean and clear but there is still
just a bit but enough solder on the top of the board to hold the IC in
place. Think I'll go the safe route and order a replacement from
Elecraft and clip the leads on the existing one.

73,
Gary
KJ7RT

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