IBM 1620

Chuck Guzis cclist at
Fri Aug 28 11:01:05 CDT 2015

On 08/28/2015 07:42 AM, Tothwolf wrote:

> 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?

That's actually a little puzzling.  1401 core frames have survived well 
(got one in my desk drawer).  You'd expect that the same process would 
be used for equipment that's pretty close to contemporary.


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