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Re: smoldering irons



Two old names in soldering irons are Ungar and Weller. These are now
combined under the Cooper Tools group.

At the Cooper web site is some good information. In particular you may wish
to download and print a brochure called "Better Soldering." The direct link
to this is http://www.coopertools.com/literature/weller/55578.pdf

The construction of good tips is complicated. Weller starts with a copper
core, then clads this with iron, then plates the working end with tin (which
is wettable with solder) and the non-woring end with nickel (which is not
wetable with solder).

Additionally, some tips have a construction such that part of the tip alloy
has its Curie temperature at the temperature we want to maintain. Circuitry
in the iron senses the change in magnetic susceptibility when the tip hits
the Cuire temperature and cuts back the power. This allows temperature
regulation "right at the tip."




Michael D. Edmiston, Ph.D. Phone/voice-mail: 419-358-3270
Professor of Chemistry & Physics FAX: 419-358-3323
Chairman, Science Department E-Mail edmiston@bluffton.edu
Bluffton College
280 West College Avenue
Bluffton, OH 45817