Ya man I sold a bunch of Ruby and a few Diamond back in the golden age. Ran a 17D3 for 3 years or so recently. It’s now making a serious analog dude in Colorado happy :-)

 

It is interesting how Dynavector adopted the MC technology by paying license fees to Ortofon and possibly Grado, and when up and running, were producing its own patents which other Companies are adopting as their own versions, especially Ortofon.

It does suggest that a magnetic field interface that is controlled does have beneficial properties in how the end sound being produced is assessed. 

It also suggests the designs are linear and quite predictable when control measures are undertaken with very tight tolerances.  

I always wondered why the 17D3 gets so little love around here.  I am very fond of mine and rank it very high among cartridges I own.

 

I was a Dynavector dealer for many years.  Always has been my favorite cartridge manufacturer.  It was one of my top cartridge sellers.

I still have in my stable a 23RS, 17D2MKII, 17D3, 19A and a couple of 20X series that need repaired.

Back in the day, Dynavector was pretty much the king...