tothwolf at concentric.net
Fri Aug 28 09:42:42 CDT 2015
On Thu, 27 Aug 2015, Lyle Bickley wrote:
> The IBM 1620 at the CHM is a running computer. There were two teams that
> worked on the 1620 at the CHM. The first Team got it running.
> Unfortunately, IBM used the wrong kind of solder on the core memory and
> so the wires of the core memory literally "dissolved".
With all the different solder alloys I work with regularly, I have to
ask...what type of solder caused that sort of damage? Was it the alloy
itself, or did IBM use a flux which was too active and then failed to
clean away all the residue? If they used a rosin-based flux, was it due to
the specific activator used in the flux?
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