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The music of reason

on May 22, 2015

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Mathematics is the music of reason. -- James Joseph Sylvester

Famous Quotations Science Friday

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What is the schematic symbol for a ferrite bead?

This is a ferrite bead. Ferrite Bead - through the hole variety So what is the schematic symbol for a ferrite bead? According to the IEEE 315 standard for Graphic Symbols for Electrical and Electronics Diagrams, the ferrite bead schematic symbol is: IEEE 315 Ferrite Bead Schematic Symbol Additionally, there are several other ways commonly used to denote a ferrite bead on a schematic: Ferrite Bead Ferrite Bead Ferrite Bead Ferrite Bead Good DX and 73, NJ2X Subscribe to the NJ2X Kindle Edition

Quick Guide To Common Multimeter Symbols and Abbreviations

Ever wonder what all the symbols and abbreviations mean on your multimeter? Here is NJ2X's handy quick reference guide to help you decode some of the more common symbols and abbreviations appearing on multimeters. Capacitor Diode AC Alternating current or voltage ~ Alternating current or voltage •))) Audible Continuity DC Direct current or voltage ⎓ Direct current or voltage V Volts mV Millivolts (1 x 10 - 3 volts) A Ampere (amps). Current ⏛ Fuse ⏚ Ground mA Milliampere (1 x 10 -3 amps) uA Microampere (1 x 10 -6 amps) nS Nanosiemens (1 x 10 -9 siemens). Conductance (1/W) Ω Ohms. Resistance kΩ Kilohm (1 x 10 3 ohms). Resistance MΩ Megohm (1 x 10 6 ohms). Resistance Hz Hertz (1 cycle/sec). Frequency kHz Kilohertz (1 x 10 3 cycles/sec). Frequency mF Microfarads (1 x 10 -6 Farads). Capacitance nF Nanofarads (1 x 10 -9 Farads). Capacitance - Negative + Positive Good DX and 73, NJ2X Other related articles on NJ2X.COM : Using

Migrating Ham Radio Deluxe to a New Computer

I have been migrating my applications and data to a new computer. My old computer served me well for many years and has been exhibiting a growing number of issues indicating it was time to be retired. The next step in the transition process was to migrate Ham Radio Deluxe (version 5.24.0.38) to the new computer running the latest version of Ham Radio Deluxe (version 6.7.0.301). I am very excited about this upgrade to HRD as I am looking forward to running a well supported high-quality application and discovering new features and enhancements. HRD has been the rug that really tied the shack together. This will also be the first version of HRD that I have had to pay for as I have always relied on the free version. My strategy was to migrate my HRD log using a backup as well as custom DM780 macros and then manually configure the application. I chose this strategy since it was straightforward and would assure a clean migration. This strategy would also afford me the opportunity to rev

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