15 Sep
2014
15 Sep
'14
12:24 p.m.
On Sun, 14 Sep 2014, Noel Chiappa wrote:
It got hot enough to burn the tin plating (the black stuff) off the
terminal and flow the solder from the pc board onto the terminal. At some
point, it got very hot...hot enough where parts of it would have been
glowing orange.
From: Sean
Caron
Honestly it looks in pretty good shape to me ..
you are seeing some
discoloration on the insulating outer plastic on the spade lug.
Ah, there's also crusty black gunk on the spade lug, where the connector
slides onto it; and on the PCB around the outer perimeter of the solder
bead at the base of the lug. See the picture again:
http://ana-3.lcs.mit.edu/~jnc/jpg/PDP11s/SigmaBurnedConnector.jpg
Maybe this is just a sign of a connector running hot, but that sure
looks like it was running a _lot_ hotter than such a connector should. 