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Ditto on the mica-compression trimmers. They cannot be contaminated by lubricants, but must remain dry to do their job.
When cleaning the rotor/stator assembly of a tuning gang use compressed air only. Be sure to apply the jet of air straight on the edge rather than at an angle to avoid bending the plates, which can lead to rotor-stator contact. Staticky action of a tuning gang when moved means the ground brushes at each partition that ride grooves in the gang shaft should be hit with DeOxIt. But application should be sparing, and to the brushes only. Lavish application of any tuner lube to a tuning gang will only lead to heartache.
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