On Tue, Jan 16, 2018 at 10:48 AM, Jim Brown <[email protected]> wrote:
> The nature of the shield matters a lot. Back in 1994, Neil Muncy, ex-W3WJE > (SK), published the landmark AES paper in which he exposed both The Pin One > Problem and Shield Current Induced Noise (SCIN). The Pin One Problem is > > I also tested the RF rejection of quad cables, including Canare, and found > that they were inferior in that regard to a good braid-shielded cable like > Belden 8412. Gotham Audio cable (an EU cable then imported by the Neumann > distributor) also performed quite well. > > All of that work was published as AES papers. > I looked at your paper "Common-Mode to Differential-Mode Conversion in Shielded Twisted-Pair Cables (Shield-Current-Induced Noise)" The cables are not identified by name. Is there a cross reference you can provide? I try to use double shielded cables or hardline in my RF installations. I have seen leakage on the order of -40 dB on crappy cables. I did use a knockoff Star Quad cable for my microphones but have no data to substantiate using it. Reading your info, it may not be the best choice. I had to add a braid from the mixer chassis to the microphone mounting for a good ground to eliminate my RFI problems. Connecting the braid to the shock mount inner ring did not work. The Metal shock mount inner ring was not connected to the metal microphone body! It looked connected, but must have a painted plastic part or non conductive paint. Thanks for all the info, Mark W7MLG ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
