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Radio Record, Volume II, Issue 32, 22 February 1929, Page 30

A NEGLECTED soldering iron which has become "scaly" can easily be cleaned by heating the iron until it is red hot and then plunging it into eold water. . HEN a water-pipe earth is used,, and a clip is placed round this to earry the contact, it will ‘often bo found that a few sharp blows on a nail so as to form projecting points, will cut through any small film that may have formed, and so ensure better contact.