On Thu, 27 Jan 2011 21:09:38 -0500, Paul Christensen wrote:
>The Pin 1 problem discussed by Muncy and Brown refers to the incorrect use >of audio shielding when the cable shielding bypasses the equipment chassis >and relies only upon circuit ground. Audio is just ELF RF. :) >The inclusion of the coaxial braid onto the SO-239 has no relevancy in and >of itself to the Pin 1 audio problem. Although that's how it is addressed in the articles, it's not just an audio problem. When is a ground not a ground? Where do induced currents on the outside of the coax shield go? What can they couple to along the way? What sort of lumped impedances are in series? No need to bring Mil-spec into the discussion, we're talking Drakes here. 73 -Jim -- Ham Radio NU0C Lincoln, Nebraska, U.S.S.A. TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! "Give a man a URL, and he will learn for an hour; teach him to Google, and he will learn for a lifetime." HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ http://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
