Fidelity Research FR-64x

And copper oxide is a poor conductor.  Whereas silver oxide conducts about as well as pure silver.

nandric

with SME 3009 and 3012. The first version was produced from steel

the later from aluminum.

Quite true and perhaps the reason for the fondness of the early
model.

I think the later R series revised the steel tube material
as an homage to the original?

@nandric what is the benefits of stainless steel ? 
I use inexpensive stainless steel PANs when i'm cooking on gas and i love it, but why it's better for tonearms? Just more weight?

My Lustre GST-801 also made of stainless steel, i believe. It was easy to rewire it with brand new discovery toneam copper wires (the original silver wire was broken and does not impressed me much, too old). 

    

Stainless steel is very heavy. Magnesium, Titanium, aluminum are all much better. 

Why are you guys guys interested in these super high mass tonearms?