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Heybrook TT2 - Turntable Earthing and Hum Issues; Earthing Procedure; Motor Vibration and Hum

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1.8 The TT2 should always be earthed to your mains supply earth, either through the mains plug or via your amplifier through
the pick-up arm earth lead. If a loud hum is noticed when turning up the volume of your amplifier it may result from the
earth loop caused by "double earthing" your turntable. Check that this is the case by removing EITHER the arm lead earth
from the amplifier, OR the mains earth green lead from the plug. The hum should then disappear. If it does not refer to the
FAULTS section after replacing the mains earth.
1.9 The motor is fitted firmly to the plinth to conduct away vibration which might otherwise find its way into the platter and
record. A slight hum may therefore be audible from the plinth with your ear held close to it, but this is normal and will not
be transmitted through your amplifier to your speakers.