On 2019-09-21 4:34 p.m., Blair & Rasa wrote:
Well, so far, no answer from Ross.
I'll answer that: It makes no difference. All copper wire is "oxygen free", because if there is too much oxygen, you can't draw it into wire as it is too brittle.
I regularly make measurements with an uncertainty of 20ppm.
Using regular wire, be it welding cable or 12AWG, even with off
the shelf coax and instrument wire in the mix. If using an exotic
wire would make any difference, that would have been discovered
When making current measurements, I can magically make my secondary leads have zero impedance. But the wire itself isn't magical.
The oxygen free idea is really designed to lighten the wallets of
silly audiophools, who believe that it will improve their
experience. They also believe that 4AWG welding cable is better
and will improve their audio.