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"Tim Wescott" wrote in message
... Do you just sit the board on the bottom of the pan, or do you space it up? Can you do double-sided boards? There's just the slightest curve on the bottom of the skillet so it sits on its corners. I don't believe this is critical. Direct contact on the face will probably work just as well. Components on the top-side only. You'll need to use a different paste if you need to reflow top and bottom, and definitely need tighter control on the temperature for the second side. An uncontrolled skillet won't do for that. Use a tin/silver paste for the first side. Its higher reflow temperature will allow you to reflow tin/lead on the second side. You'll want to use stand-offs in a properly controlled oven for that. What else didn't I ask? Hot air is an alternative. I use a Weller Portasol with hot air nozzle for small rework. I hear of others replacing the rubber bulb on a Radio Shack desoldering iron with an aquarium pump. It takes longer to build a board, but might suit the pace of a homebrewer better. I've seen the web sites showing how to do toaster-oven reflow -- have you tried that? I haven't tried using a toaster oven. The concepts remain the same, however. There might be a difference between heating with IR elements and heating the board more or less directly. |
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