NorthernLightX Posted January 18, 2004 Report Posted January 18, 2004 Hi,I've done almost all the boards now (3xCore, 3xSID, and others), and want to put them to work. Only thing is, when I started soldering them, I equipped each one with the needed power regulating stuff. Now that the C64 PSU with some mods will take care of the entire power distribution, will some parts need to be removed from the Core & SID boards?Also, the oxidation on Mikes boards does not go away when rubbing it with a soft eraser, can I just spray Reichelts Lotlack over it to stop spreading or do i need to remove the oxidation first? Can I put the boards in an acidious solution, to let that react with the oxidation, or will it eat the pertinax?Thanks for your advice.NLX. Quote
doc Posted January 18, 2004 Report Posted January 18, 2004 Hi,you can leave some parts out. Just look at:http://www.ucapps.de/mbhp/mbhp_4xsid_c64_psu_optimized.pdfThe regulators of the cores are replaced by a bridge.You can leave several parts of the core out, also. But If you already soldered it, it doesn't matter. ::)Your oxidation problem:I don't know how hard the oxid is. If it's not so strong, just clean it with pure alcohol (no, don't use your best brandy on that - just take "Spritus" ;D)After that you can spray it with Loetlack. In fact, the pertinax will never be eaten up (except you take a byte of it). But after using "Loetlack" your soldering is a bit easier. Hope this helps you ...DOC Quote
pay_c Posted January 19, 2004 Report Posted January 19, 2004 Oxidation: If doc´s recoms don´t help (which means it´s a really thick oxid cover), just take a sandpaper and lightly go over the PCB a bit. Then Lötlack again. Worked out well for me. Quote
NorthernLightX Posted January 19, 2004 Author Report Posted January 19, 2004 Thanks, i will try that tonight, first i'll use some spiritus, and if that doesn't work i'll go for sanding. That will be a bit tricky, because i already have al the parts stuffed...What happens if some oxidation remains under the Lotlack? Will it spread, or is it no problem to have a little oxidation? I think it can not spread if I spray it, because there's no more oxygen reacting with the copper right? Quote
pay_c Posted January 19, 2004 Report Posted January 19, 2004 That´s correct.But also the flux is there to take away *small* amounts of oxide within the soldering process (it gets the oxid away when it´s getting hot). That helps !alot! doing nice soldering. Quote
doc Posted January 19, 2004 Report Posted January 19, 2004 Just a tip for the future...Clean your boards BEFORE soldering and then spray it with Lötlack. You won't have any trouble with oxid again ... ;)doc Quote
Nomical Posted January 19, 2004 Report Posted January 19, 2004 I just recieved my Loetlack too ;DI got the same problem with some pcb's that have all the parts already soldered onto, but i haven't tried the pencil eraser idea yet. I will try it as soon as possible.I think using acidic solutions wouldn't be wise because of possible problems with the pH. Quote
doc Posted January 19, 2004 Report Posted January 19, 2004 spiritus is not acidic. It's pure alcohol. Theres no problem with that ;) ...don't drink it! :P Quote
NorthernLightX Posted January 20, 2004 Author Report Posted January 20, 2004 Ok, Spiritus didn't do a thing. I hate to try the sanding paper, because i've already stuffed all the parts. Will covering the board in Lotlack stop all further oxidation, or do I have to remove the oxidation first? Quote
pay_c Posted January 20, 2004 Report Posted January 20, 2004 Yepp, it will stop any further oxidation.Greetz Quote
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