I saw one of those yesterday at a friend's house, in his giant stash of old cartridge bodies. I remember wondering what "dynetic" was supposed to mean. I could probably pick it up pretty cheaply, and compare it to my M7d that I recently picked up if I get new stylii for them.
I eventually did end up getting this cartridge and have had it since around just after the above quoted post. And every attempted use of it was a disappointment, until now. I found an N21 stylus for it, apparently NOS Shure though not labeled as such (in the little plastic pill container), and I don't even remember now where I sourced that from. I tried this on my Lenco, and the iffy arm condition on my L-70 (my suspicion, though it tracks ok) must have been holding it back. I tried it on a whim on my linear tracking table..also disappointing. I tried it on a Pioneer PL-630 ...arm was way too light, tracked with a lot of distortion. Tried it on my VPI, nope, didn't like that either. Always with the "shhhhhh" sibilant distortion.
On a whim I mounted it to my Sansui SR-929 last night and ....ok, I get it now. Tracking at around 2 grams with added headshell weight to raise the mass of the arm, playing some old jazz records, and wow..this is just what some of these old records need. And its finally tracking now for some reason...I'm assuming the arm mass. Big, open sound. Immediate and natural sounding. Not about detail and it's rolled off. It makes some very nice newer recordings sound blah, but on other stuff it just seems to be exactly the cart to run to.
It makes a good argument for running more than one turntable, or having interchangeable headshells (or both). It's going to stay on the SR-929 for awhile, making the perfect contrast to the AT OC-9mlII on the VPI.
Note that it sounded like crap...actual crap of the smelly kind... in nearly every context I tried it out in before. I'd get it working on one album and it would distort on another. I remember posting somewhere that I liked it, then that I hated it after an hour. But when it all worked, it worked out very nicely. I'm finally glad I bought this cart and the N21.