[AMRadio] Coil

[Donald Chester]

Re removing enamel insulation from fine enamelled wire.

Scraping fine enamelled wire is apt to damage the strand and may not clean off all the insulation.  Heating with a flame will leave the copper so brittle that it will break easily.

The following method is described in a 1949 publication "Electronics manual for radio engineers":

Apply a small quantity of a paste of zinc chloride and water to the strand and heat with a soldering iron, immediately followed by tinning with rosin core solder while the resulting mixture of zinc chloride and enamel is still boiling. Wipe off the residue and excess solder with a damp rag quickly, while the wire is still hot.


Don k4kyv