I am not in the financial position to buy a new low output mc cartridge and I spoke with Mike at VPI and he said the cartridge is NOT a mismatch for my JMW9 arm, especially since I had the new and heavier counterweight. I purchased the cartridge from Audiofeil and he has assured me that he has sold many of them to people with VPI Scouts. Since the problem happened when the volume was up after a certain level, tells me it is more acoustic feedback than anything else. Relocating the turntable or putting it on a shelf on the wall wasn't/isn't an option since I share the living room with my wife. She has been really good about my sound system, so why rock the boat?
I tried many different tt isolation tweaks: I removed the turntable off the slab of granite it was sitting on, I tried a friends Black Diamond shelf, I put tennis balls under the tt, I tried a Townshend seismic sink (borrowed from a friend), I tried my Big Rock setup (box filled with sand and floating shelf on top, and NOTHING helped. So
Dougdeacon, why do you have the audacity to say I didn't try other posters suggestions????? Stop trying to read between the lines.
The KAB rumble filter did it's job, I am happy, end of story.
Bob