[Amps] World's worst coax connectors

[Jim Brown]

On 4/23/2023 9:43 AM, jim.thom jim.thom at telus.net wrote:
> ALL of my XLR cables I fabricated myself, were 1 pair, twisted, and teflon
> insulated..and a woven braid, then the outer pvc sheath...(surplus telco
> cable we tossed at work).

Jim,

AES Standards, like all REAL Standards, are produced by engineers 
working in a very broad cross-section of the industries who will use 
those Standards. Your application is but a pimple on the elephant. The 
company whose advice you quote, while the designer of truly 
excellent-sounding dynamics processing (for its time) for broadcasting 
and broadcast production, also sells products with SCREAMING Pin One 
Problems, one of which was among several I tested in the VHF-UHF-rich 
environment of downtown Chicago. With properly wired test cables, its RF 
susceptibility made it un-useable. This 2003 AES Paper documents that 
work.   http://k9yc.com/AESPaperNYPin1-ASGWeb.pdf

This AES Paper documents corresponding work on condenser mics from 
Neumann, AKG, Sennheiser, and Shure. Although not identified by name, 
the worst offender was Neumnann, the best was Sennheiser. When I showed 
this to  the AES Standards Working Group on mics, which included members 
from those companies and others, I did identify them. The amusing part 
was that Sennheiser had by then acquired Neumann, but their engineering 
groups were independent operations.
http://k9yc.com/AESPaperNYPin1-ASGWeb.pdf

The digital revolution has drastically changed audio signal distribution 
for large scale production in the years since AES analog Standards were 
written, but the stated practice was absolutely essential when, for 
example, in medium to large scale music performances two 32-64-input mix 
desks, usually at widely separated locations, are producing separate 
mixes from the same mics -- one for the audience, another for performers 
on stage. And there are direct feeds from amplified instruments like 
keyboards, guitar, and bass, that feed their own amps running on stage 
power. If the production is being broadcast or recorded, a third mix in 
a truck is producing that mix. In addition to their physical separation, 
the truck will have it's own power feed. Those separate mix desks within 
the facility, or with a touring company, were often NOT from transformer 
isolated splits. AES Standards are written so that those applications 
are viable.

73, Jim K9YC