Through Hole vs. Surface Mount
in [Design]
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From: Robert Baer on 31 Mar 2010 01:25 Joerg wrote: > Robert Baer wrote: >> Joerg wrote: >>> Robert Baer wrote: >>>> Joerg wrote: >>>>> Martin Riddle wrote: >>>>>> "Chris" <christopher.maness(a)gmail.com> wrote in message >>>>>> news:fbd910e4-f10e-42d8-a193-bb9c7a1cd19f(a)c2g2000pre.googlegroups.com... >>>>>> >>>>>>> I have just completed a designing a board that has 5 16 pin ICs. I >>>>>>> was planing on etching and drilling myself, but after my last >>>>>>> project >>>>>>> took for ever to drill far fewer holes, I was considering going >>>>>>> surface mount. I am only planing to make three at first. Should I >>>>>>> stick to through hole for the ease of hand soldering, or should I >>>>>>> switch to decaf and wait a month and try my hand at surface mount. >>>>>>> >>>>> >>>>> A glass of Guinness works much better :-) >>>>> >>>>> >>>>>>> Comments Welcome, >>>>>>> Chris Maness >>>>>> >>>>>> I second the SMT try. It's not as difficult as it seems. Get a >>>>>> good magnifier , headband type. >>>>>> A good pair of tweezers, fine tips for your iron, and fine 0.015" >>>>>> solder helps too. >>>>>> >>>>> >>>>> I like 0.015" Kester No-Clean best. No mess. >>>>> >>>>> >>>>>> There are some good parts out there that only come in SMT. >>>>>> >>>>> >>>>> Yep, like tons of great RF transistors or fast opamps. >>>>> >>>> "No-Clean"? GACK! avoid that junk like the plague it is... >>> >>> >>> I've had no issues at all with it. Very clean solder joints, and they >>> stay clean. >>> >> 1) What do you use to clean the glop off? > > > There is no glop. * Interesting; Absolutely nothing but solder, nothing to remove oxides, etc?? Then it DOES NOT CLEAN and so that is why it is called "no clean"?? > > >> 2) What about leakage current issues? >> 3) What about high voltage issues? > > > Never had any. > > >> 4) What about reliability issues if glop is left alone? > > > I have test gear here that I built years ago. Totally reliable. In fact > I have to build some more today, need a variable frequency mains supply > to test for international voltages and also 400Hz aircraft stuff. >
From: Joerg on 30 Mar 2010 12:42 Robert Baer wrote: > Joerg wrote: >> Robert Baer wrote: >>> Joerg wrote: >>>> Robert Baer wrote: >>>>> Joerg wrote: >>>>>> Martin Riddle wrote: >>>>>>> "Chris" <christopher.maness(a)gmail.com> wrote in message >>>>>>> news:fbd910e4-f10e-42d8-a193-bb9c7a1cd19f(a)c2g2000pre.googlegroups.com... >>>>>>> >>>>>>>> I have just completed a designing a board that has 5 16 pin ICs. I >>>>>>>> was planing on etching and drilling myself, but after my last >>>>>>>> project >>>>>>>> took for ever to drill far fewer holes, I was considering going >>>>>>>> surface mount. I am only planing to make three at first. Should I >>>>>>>> stick to through hole for the ease of hand soldering, or should I >>>>>>>> switch to decaf and wait a month and try my hand at surface mount. >>>>>>>> >>>>>> >>>>>> A glass of Guinness works much better :-) >>>>>> >>>>>> >>>>>>>> Comments Welcome, >>>>>>>> Chris Maness >>>>>>> >>>>>>> I second the SMT try. It's not as difficult as it seems. Get a >>>>>>> good magnifier , headband type. >>>>>>> A good pair of tweezers, fine tips for your iron, and fine 0.015" >>>>>>> solder helps too. >>>>>>> >>>>>> >>>>>> I like 0.015" Kester No-Clean best. No mess. >>>>>> >>>>>> >>>>>>> There are some good parts out there that only come in SMT. >>>>>>> >>>>>> >>>>>> Yep, like tons of great RF transistors or fast opamps. >>>>>> >>>>> "No-Clean"? GACK! avoid that junk like the plague it is... >>>> >>>> >>>> I've had no issues at all with it. Very clean solder joints, and >>>> they stay clean. >>>> >>> 1) What do you use to clean the glop off? >> >> >> There is no glop. > * Interesting; Absolutely nothing but solder, nothing to remove oxides, > etc?? Then it DOES NOT CLEAN and so that is why it is called "no clean"?? > All I can tell you is that there is no glop. I just did a few more solder joints and held them under a magnifier -> nada, zilch, clean. Maybe you used the wrong temperature? My Weller is running at 640F right now. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Archimedes' Lever on 30 Mar 2010 19:19 On Tue, 30 Mar 2010 09:42:05 -0700, Joerg <invalid(a)invalid.invalid> wrote: >All I can tell you is that there is no glop. I just did a few more >solder joints and held them under a magnifier -> nada, zilch, clean. > >Maybe you used the wrong temperature? My Weller is running at 640F right >now. Most 'no-clean' hand operations I ever saw left the perfectly formed solder joint encapsulated in a thin flux film. Are you sure that you are not just too old or too non-detail oriented to 'see' it, even though it is there? The flux does not evaporate, and is, by design, meant to remain, so it *has* to be there... literally.
From: Joerg on 30 Mar 2010 19:43 Archimedes' Lever wrote: > On Tue, 30 Mar 2010 09:42:05 -0700, Joerg <invalid(a)invalid.invalid> > wrote: > >> All I can tell you is that there is no glop. I just did a few more >> solder joints and held them under a magnifier -> nada, zilch, clean. >> >> Maybe you used the wrong temperature? My Weller is running at 640F right >> now. > > > Most 'no-clean' hand operations I ever saw left the perfectly formed > solder joint encapsulated in a thin flux film. Are you sure that you are > not just too old or too non-detail oriented to 'see' it, even though it > is there? > > The flux does not evaporate, and is, by design, meant to remain, so it > *has* to be there... literally. Ok, but it hasn't corroded or otherwise tainted one lone solder joint in years. If it does cause a failure 300 years down the road I think I could live with that :-) -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Robert Baer on 31 Mar 2010 17:48
Joerg wrote: > Robert Baer wrote: >> Joerg wrote: >>> Robert Baer wrote: >>>> Joerg wrote: >>>>> Robert Baer wrote: >>>>>> Joerg wrote: >>>>>>> Martin Riddle wrote: >>>>>>>> "Chris" <christopher.maness(a)gmail.com> wrote in message >>>>>>>> news:fbd910e4-f10e-42d8-a193-bb9c7a1cd19f(a)c2g2000pre.googlegroups.com... >>>>>>>> >>>>>>>>> I have just completed a designing a board that has 5 16 pin >>>>>>>>> ICs. I >>>>>>>>> was planing on etching and drilling myself, but after my last >>>>>>>>> project >>>>>>>>> took for ever to drill far fewer holes, I was considering going >>>>>>>>> surface mount. I am only planing to make three at first. >>>>>>>>> Should I >>>>>>>>> stick to through hole for the ease of hand soldering, or should I >>>>>>>>> switch to decaf and wait a month and try my hand at surface mount. >>>>>>>>> >>>>>>> >>>>>>> A glass of Guinness works much better :-) >>>>>>> >>>>>>> >>>>>>>>> Comments Welcome, >>>>>>>>> Chris Maness >>>>>>>> >>>>>>>> I second the SMT try. It's not as difficult as it seems. Get a >>>>>>>> good magnifier , headband type. >>>>>>>> A good pair of tweezers, fine tips for your iron, and fine >>>>>>>> 0.015" solder helps too. >>>>>>>> >>>>>>> >>>>>>> I like 0.015" Kester No-Clean best. No mess. >>>>>>> >>>>>>> >>>>>>>> There are some good parts out there that only come in SMT. >>>>>>>> >>>>>>> >>>>>>> Yep, like tons of great RF transistors or fast opamps. >>>>>>> >>>>>> "No-Clean"? GACK! avoid that junk like the plague it is... >>>>> >>>>> >>>>> I've had no issues at all with it. Very clean solder joints, and >>>>> they stay clean. >>>>> >>>> 1) What do you use to clean the glop off? >>> >>> >>> There is no glop. >> * Interesting; Absolutely nothing but solder, nothing to remove >> oxides, etc?? Then it DOES NOT CLEAN and so that is why it is called >> "no clean"?? >> > > All I can tell you is that there is no glop. I just did a few more > solder joints and held them under a magnifier -> nada, zilch, clean. > > Maybe you used the wrong temperature? My Weller is running at 640F right > now. > I do not and have never tried "no clean" as there were too many horror stories. |