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Powdered graphite, obtainable in tube form from most auto stores, makes an ideal lubricant for panel bearings, rolling contacts of rotary inductors, and other control mechanisms that become squeaky or binding after a period of use. Graphite is also a good conductor and therefore will not adversely affect the operation of a circuit if, during application of the lubricant, it is allowed to make direct contact with capacitors, coils, etc.

Wm. C. Martin, W6PLS.