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Discussion of precise time and frequency measurement

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I love the smell of tantalum in the morning

MS
Mark Sims
Sat, Nov 5, 2016 9:56 PM

Tom's method is what I use when replacing commodity parts that I don't care about salvaging.  Much less chance of damaging anything.  Hack the part apart,  cut the leads on gull wing packages, etc.  Don't waste your time with tweezers,  lifting one end, etc.  I have a very nice set of hot tweezers and almost never use them.

And for DIP packages cut the package free from the leads first...  even though I have a $6000+ vacuum desoldering station,  trying to get all the leads unsoldered cleanly and prying out the chip always risks tearing out a feed through... particularly on multi-layer boards with out thermal isolation vias on power/ground connections.


I usually nibble away at the center of the part until it is two separate

pieces. Then unsolder each piece. Clean the pads off with wick then install
the new part.

Tom's method is what I use when replacing commodity parts that I don't care about salvaging. Much less chance of damaging anything. Hack the part apart, cut the leads on gull wing packages, etc. Don't waste your time with tweezers, lifting one end, etc. I have a very nice set of hot tweezers and almost never use them. And for DIP packages cut the package free from the leads first... even though I have a $6000+ vacuum desoldering station, trying to get all the leads unsoldered cleanly and prying out the chip always risks tearing out a feed through... particularly on multi-layer boards with out thermal isolation vias on power/ground connections. ----------------- > I usually nibble away at the center of the part until it is two separate pieces. Then unsolder each piece. Clean the pads off with wick then install the new part.
CJ
Clint Jay
Mon, Nov 7, 2016 7:47 PM

Definitely, for a proven bad or dirt cheap leaded part when the board is
valuable cut the legs. gives you an added advantage when removing the part
as well as you can apply heat to both sides of the leg if it's through
hole.

On 5 November 2016 at 21:56, Mark Sims holrum@hotmail.com wrote:

Tom's method is what I use when replacing commodity parts that I don't
care about salvaging.  Much less chance of damaging anything.  Hack the
part apart,  cut the leads on gull wing packages, etc.  Don't waste your
time with tweezers,  lifting one end, etc.  I have a very nice set of hot
tweezers and almost never use them.

And for DIP packages cut the package free from the leads first...  even
though I have a $6000+ vacuum desoldering station,  trying to get all the
leads unsoldered cleanly and prying out the chip always risks tearing out a
feed through... particularly on multi-layer boards with out thermal
isolation vias on power/ground connections.


I usually nibble away at the center of the part until it is two separate

pieces. Then unsolder each piece. Clean the pads off with wick then install
the new part.


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--
Clint.

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of electrons were greatly inconvenienced.

Definitely, for a proven bad or dirt cheap leaded part when the board is valuable cut the legs. gives you an added advantage when removing the part as well as you can apply heat to both sides of the leg if it's through hole. On 5 November 2016 at 21:56, Mark Sims <holrum@hotmail.com> wrote: > Tom's method is what I use when replacing commodity parts that I don't > care about salvaging. Much less chance of damaging anything. Hack the > part apart, cut the leads on gull wing packages, etc. Don't waste your > time with tweezers, lifting one end, etc. I have a very nice set of hot > tweezers and almost never use them. > > And for DIP packages cut the package free from the leads first... even > though I have a $6000+ vacuum desoldering station, trying to get all the > leads unsoldered cleanly and prying out the chip always risks tearing out a > feed through... particularly on multi-layer boards with out thermal > isolation vias on power/ground connections. > > ----------------- > > > I usually nibble away at the center of the part until it is two separate > pieces. Then unsolder each piece. Clean the pads off with wick then install > the new part. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > -- Clint. *No trees were harmed in the sending of this mail. However, a large number of electrons were greatly inconvenienced.*