Soldering chips easy electric soldering iron with special tip (see figure). For this presleyana copper rod of diameter 4-5 mm drill hole Ø 0,8 mm at the depth of 6 mm. Drilling is necessary, be careful, as copper is a viscous material and sloppy work is easy to break the drill bit. Perform soldering using rosin varnish. V. MOLOCHKOV, G. Novgorod
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