Jan 12, 2012

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  • How to get amateur radio license plates for your vehicle. This for California hams. Regulations may differ for your state. Check with your local DMV.
  • Understanding and Eliminating Groundloops: Many designers and installers of audio/video systems think of grounding and interfacing as a black art. How many times have you heard someone say that a cable is picking up noise presumably from the air like a radio receiver? Or that the solution is better shielding? Even equipment manufacturers often don’t have a clue what’s really going on. The most basic rules of physics are routinely overlooked, ignored, or forgotten.
  • Understanding How Ferrites Can Prevent and Eliminate RF Interference to Audio Systems: Over the past few years, we’ve been learning about some important mechanisms that can combine to cause radio frequency (RF) interference to sound systems. Analysis shows that RF shield current is a major contributor, so eliminating or reducing shield current should be the key to eliminating the interference. This document gives some suggestions.
  • ARRL map for WAS: If you are trying for a Worked All States certificate, this may be of help to you.
  • Grid map: ARRL map of North American Maidenhead grid squares. Lincoln is CM98iv, Rocklin and Loomis is CM98jt, and Roseville is CM98is.
  • Q-codes: These are short-hand signals used especially during CW transmissions (and to a lesser extent during voice transmissions) to help keep conversations short and convey as much information as possible in the shortest length of time.
  • Band plans: Listing from ARRL of all U.S. ham bands with suggest band usage.