Thank you for visiting RF Cafe!

Your RF Cafe
Progenitor & Webmaster

Click here to read about RF CafeView the YouTube RF Cafe Intro VideoKirt Blattenberger
BSEE
KB3UON
EIEIO

Carpe Diem!
(Seize the Day!)

5th MOB:
My USAF radar shop

Airplanes and Rockets:
My personal hobby website

Equine Kingdom:
My daughter Sally's horse riding website

RF Cafe Software

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
RF & EE Symbols Word
RF Stencils for Visio

Sherlock Ohms: The Case of the Common Ground

Sherlock Ohms: Looking for Common Ground - RF CafeYou have probably heard the old (erroneous) adage, "Ground is ground the world around." That might have been true prior to the advent of electronics, but it certainly isn't so anymore. Even in the vacuum tube days it wasn't so. Once frequencies get high enough that reactance rivals resistance for dominance, you can forget about simple grounding concepts for anything other than providing a measure of safety against electrical shock. This latest installment of EDN's Sherlock Ohms series is an account by John Lombard on his experience in, "Looking for Common Ground." He begins, "The term 'ground' should be used more carefully. In our equipment, we distinguish between ground and DC common for good reason. Ground refers to chassis or safety ground to take errant AC voltage to ground instead of through an operator's body..."






Posted  September 19, 2013
 
Copyright 1996 - 2016
Webmaster:  Kirt Blattenberger, BSEE - KB3UON

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.