UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Sony WM-D6C Hi-freq sound of motor heard recorded on tape

TIMTAPE · 25th Mar 2020, 7:54 am

Also, generally, a motor which is labouring under excessive load (although perhaps still maintaining correct speed) can transmit increased interference through modulation of the power supply rail and even interference through sparking at the brushes and commutator.

Good service manuals sometimes quote an acceptable motor current draw figure in normal conditions.

25th Mar 2020, 7:54 am	#3
TIMTAPE Octode Join Date: Jul 2006 Location: Perth, Western Australia Posts: 1,973	Re: Sony WM-D6C Hi-freq sound of motor heard recorded on tape Also, generally, a motor which is labouring under excessive load (although perhaps still maintaining correct speed) can transmit increased interference through modulation of the power supply rail and even interference through sparking at the brushes and commutator. Good service manuals sometimes quote an acceptable motor current draw figure in normal conditions.