So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2
I observed the weirdest thing I have ever seen in audio. With the cartridge positioned above the record, tone arm locked up and platter spinning, the woofers were pumping on my system. I googled every permutation of query I could think of but came back with no hits. That’s when I decided to video the problem- link below:
I could type out all the details but the video pretty much covers everything. I thought ya’ll might be interested in this.
Maybe I can pick up some cheap XLR to RCA adapters just for fun and see if it repeats. I think the problem is stored energy in the vinyl and the mat- either separately or combined. I’m not sure if an earth grounded chassis would help. This TT is not earth grounded. The motor power is a 2 prong feed from a 120/100 volt step down transformer. The native power being Japanese 100v 60hz.
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One or several points on the platter that are magnetic, not the whole platter. The effect would be a similar to a Hall effect sensor. Your MC cartridge is acting as the pickup. Yes, the platter needs to rotate to make it work. I’d venture a guess that you would see the woofers pulsing just by turning the platter slowly by hand. |
Plastics can hold and build a charge see the OSHA Warning https://www.osha.gov/publications/hib19880930 |
