25-Nov-2014, 00:07
(24-Nov-2014, 02:01)IanG-UK Wrote: There is a note on a possible approach here:
http://www.rane.com/pdf/ranenotes/Interf..._SPDIF.pdf
More interesting is the Blue Jeans note:
http://www.bluejeanscable.com/articles/75ohmrca.htm
As Pim says, pertinent issues are those of attenuation and interference from outside (I guess neither should be a problem) but the shortcomings of the impedance mismatch might be usefully explained, if anyone knows.
Ian,
Thanks for the supplied links! For me this was a decider. In a mix of views and information I'll drop the 110 ohm lead and i will use my 75 ohm cable but as reported before I will use a Lundahl transformer inside the Neutrik XLR meaning 75/110 conversion will be at the plug and not on the cable. Despite Devialets view on this I feel this is better than just running a 110 ohm cable with a so-so 75 ohm signal into the 110 transformer in the Dev.
Will report back when done!
Tanks/Mike
Ex D400 Now Aavik U-300/Feickert Woodpecker2-Kuzma 4P-Kondo silver-Benz LPS-Teddy Pardo PSU/Naim Unitiserve-Teddy Pardo PSU/SF Guarneri Homage/Whole system decoupled by Ansuz DTC/Cables from Ansuz, DYI and other commercial/Dedicated mains and spur-Lampizator SILK