Electronics Forum | Mon Jun 22 21:42:02 EDT 1998 | Dave F
| We are discussing the importance of pre-hating components or the pcb in order to repair the board. I am interested in other peoples opinions | on pre-heating. Bill: Some folks we talking about preheating capacitors earlier this month in the threa
Electronics Forum | Tue Feb 14 10:25:04 EST 2017 | swag
Pre-heat, pre-heat, pre-heat! Swap out your acetylene with some propane. Problem solved. Throw a potato in your solder pot while your at it...
Electronics Forum | Wed Sep 12 12:08:16 EDT 2012 | tkotwal
Thanks for the advice. We have only done one PCB with HMP solder and did not use preheating, but I've been wondering if it would have been helpful since we had some trouble getting the solder to flow. If you have any more specific advice about the te
Electronics Forum | Wed Sep 16 15:45:28 EDT 1998 | Rob Fischer
| | Dave, | | How thick are your PCBs? Do you have adequate topside preheat or are the bottom preheaters turned up to ensure proper filleting on the top side? | | Rob | Rob, The average PCB is .062". There is no topside preheaters on our
Electronics Forum | Thu Feb 21 14:40:42 EST 2013 | hegemon
My own preference in this arena is towards the forced air convection style preheat, the key being the forced air. Radiant preheat is too slow for some, and IR preheat can have other issues that convection (or radiant) will not. Zephyrtronics has bee
Electronics Forum | Thu Jun 22 11:09:11 EDT 2000 | C.K.
TYPE of Preheater makes a HUGE difference, as well. Infrared (IR) and convection, 2 of the most common types of preheaters, have very different heat transfer characteristics..... Convection heats your board more uniformly, so you'll see very small
Electronics Forum | Sun Oct 10 00:40:42 EDT 1999 | John
| I'm searching for a source for surface mount socket savers that accept a hand test socket (Yamaichi, Nepenthe etc...). Barring availibity of an SMT socket saver does anyone know a good technique for soldering socket savers into a .250" thick, 20+ l
Electronics Forum | Sun Jan 30 03:06:50 EST 2000 | Roni H.
Hi, The major reason is that the flux is still "wet", you should fix the temp. profile (specialy preheat zone) so the evaporation of flux carriers will be better (anyway not to much !). Recommended: 1st preheat zone heating to ~70C , 2nd&3rd prehea
Electronics Forum | Thu Aug 01 08:31:51 EDT 2002 | patrickbruneel
Christopher, It looks like you might be close to the solution for your problem because you mentioned that you can make the solderballing worse with lowering the preheat temp. This means that the preheating has a significant impact. I would suggest t
Electronics Forum | Fri Mar 28 09:44:11 EST 2003 | Claude_Couture
Your preheat temp seems excessive, what kind of solder paste do you use. can you try a max preheat temp of 140 degC? The reason for this is to let the solvents in the paste evaporate while keeping the activation of the flux for the very last moment b
