Choke Coils
RRADIO-FREQUENCY choke coils, and similar units that must be kept dry, may be coated with a good grade of shellac, This may be slow in drying and in no case should it he used with high voltage until it is thoroughly dry, The drying process may be speeded up by suspending the coil in an oven in such a manner that it will not become scorched. Close the oven door hut open it frequently to, observe the condition of the coil. When it is thoroughly heated, and the smell of alcohol from the shellae is strong, remove the coil and allow it to cool. The heat drives out the alcohol and any moisture present, Dampness will often cause trouble and possible breakdown in radio receivers that have stood in fa damp place for any length of time. The set miy be quickly dried out by placing a lighted 75-watt bulb inside the sabinet near the chassis and closing the back and top temporarily,
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https://paperspast.natlib.govt.nz/periodicals/RADREC19320708.2.44
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Radio Record, Volume V, Issue 52, 8 July 1932, Page 23
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165Choke Coils Radio Record, Volume V, Issue 52, 8 July 1932, Page 23
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