Your iron is too cold, Gerhard!
I never solder below 375C to 400C. What's happening to you is that any pads
that are attached to the ground plane like the ones in your photo are losing
too much heat to the ground plane for solder to flow.
Ron AC7AC
-Original Message-
Hi again,
just took a photo. You see it seems to affect only a special kind of hole
(see picture). You can see on the picture that other holes work well.
http://www.gs-roboter.de/problem.htm
Iron is temp regulated at 330 deg C. Same like before. I already changed
iron and solder. To no avail.
73 again.
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