On Tue, 24 Feb 2004 12:54:26 -0800 (PST), sirish minapalli
<
sirish4jobs@...> wrote:
> Hello everybody...
>
> I hope somebody could solve my problem with regards to soldering and
> desolderin a transistor. i'm currently workin on building a s-parameter
> test board for measuring the s-parameters of transistor. the plan is to
> hav a single board and make all students put their transistors on the
> board, measure s-parameters and then take it off. at first i thought
> solderin wud b good...but wats happening is while desoldering atleast
> one of the pins is getting broken . and by the time i melt the solder on
> all the 4 pads having 4 pins in order to remove the transistor, they
> become cold and i'm not able to take the transistor off...So i was
> wondering there shud b another way to do it. if nebody could come up
> with a suggestion, it would b gr8. thanks
> regards
> chris
>
well, you heat one leg, just pull as much as the other legs will flex,
then do this with every
leg in turn. after some rounds (depending on how many legs the part has)
it comes off.
for temporary mounting it is much faster if you don't put it through a
plated hole but on solder
pins or such.
you coud use a solder sucker (please the expensive heated version).
you could use a iron big enough to heat all pins (special shape).
you yould use hot air to heat all pins.
you could use a socket (which is the best idea if you want not to teach
them soldering)
ask if you have further questions
st