I've been running mine at 750 and I don't ever get any cold solder joints but it seems to look a little darker then some jobs I've seen.Hot one works the best.
Might be your solder or solder flux.I use Kester 60/40.it seems to look a little darker then some jobs I've seen.
Ya I've been using flux core leaded solder. here is a pic of what I mean by darker. it seems like the flux is what burns to me see arrows..Willy, The more heat you use the greater the chance of lifting the traces off old Sansui boards.
This is why most people suggest avoiding the new lead free solder as it takes more heat to flow
thus increasing the chance of smoking components and/or accidentally lifting the trace from the circuit board.
675-700 as Conrad suggested above.
Also, the craptastic idea of a tree hugger friendly solder leads to uglier joints as it flows/melts somewhat poorly.
Stick with lead/tin mix to help keep board, components and iron temps down.
Just my 2 cents.
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Ya i may be holding the iron on the pad to long.Remember heat and temperature are not the same thing.
I'll try that avionic..I know i can solder and make things work but I was trying to figure out why mine wasn't as pretty as some I've seen here on AK..Clean the boards with acetone and a acid brush after soldering. Will definitely improve the aesthetics of the board if you remove the excess flux. And make your solder connections shine.
I found this paper on soldering by a recently deceased industry expert; a good read... http://www.kester.com/Portals/0/Documents/Knowledge Base/Lead-free-Handsoldering.Final_.4.19.06.pdf
I am using a tip temperature of 750F 400C on my Weller WSD81, good quality lead-free solder and genuine Weller tips but I have trouble with persuading the solder joints to melt when de-soldering. Not sure what I am doing wrong so I will keep monitoring this thread for ideas.
I found this paper on soldering by a recently deceased industry expert; a good read... http://www.kester.com/Portals/0/Documents/Knowledge Base/Lead-free-Handsoldering.Final_.4.19.06.pdf
I am using a tip temperature of 750F 400C on my Weller WSD81, good quality lead-free solder and genuine Weller tips but I have trouble with persuading the solder joints to melt when de-soldering. Not sure what I am doing wrong so I will keep monitoring this thread for ideas.