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Rigid G10 PCB


The holes were used to hang the parts while cleaning

Ultrasonic Frequencies used. 40/80/120 khz

Temperature 40 degrees C

Alkaline Cleaner (highly concentrated)

Cleaning time 3 hours

Power: AC 120 50/60 Hz

This cleaning required using high frequency first to loosen up the carbon and use highly concentrated alkaline cleaner in a beaker and rotating between all 3 freqencies 40/80/120. Stacking these parts did not work. They needed to be strung up on a wire.

Notice on the top right clean part the heat stain on the nickle. Gentle polishing removed this stain.