HK t-60.....

I was using a Signet AM20 cart, and no, I don't own a test record. The table was sitting in the same place all of my tables sit and none of the others were so sensitive.

It originally had an Ortofon OM20 mounted, which is a super low mass cart and perhaps a much better match to the low mass arm of the HK. I'll put the Orto back on it and re-test.

Thanks.

You should check out the test record I mentioned. The resonance tests are pretty cool and I haven't found a better way to set anti skate. There's also a test for azimuth.

This link explains cartridge to tonearm matching better than I ever could..
http://www.theanalogdept.com/cartridge___arm_matching.htm
The test record can be used to verify the results

Heyraz, I took your advice finally and mounted the Ortofon OM20 on the T55c. You were right, the Signet was a bad cart/tonearm match. It's playing Alan Parsons Vulture Culture right now, and no issues with acoustic feedback or footfalls - just sweet analogue sounds :)

Wayside-Glad to hear that worked out for you. When I first got my T60 I tried mounting a Micro Acoustics cartridge and it simply didn't work. It skipped all over the place and sounded terrible when it did track. That's when I learned about things like compliance and resonance. The Microrace tonearm is considered lightweight, so not all cartridges out there will work with it. The info from the Analog Depot really turned my head. All these years I had no idea how complex the mating of a cartridge to a tonearm could be.