background preloader

ARRL - The national association for AMATEUR RADIO

ARRL - The national association for AMATEUR RADIO

http://www.arrl.org/

Related:  Amateur Radio IN2BHA Ham RadioAmatuer \ Ham Radiorod57Ham Radio

Ham Radio Homebrew EI9GQ homebrew radio page Green Bay Professional Packet Radio -- Loaded With GHz projects and much more. Grid Dip Oscillator -- From Harry Lythall - SM0VPO Harry's Homebrew Home Page -- Transmitters, Antennas, Receivers, Lots More Make PCBs at home with magazine paper and your laser printer How to make PCBs at home in 1 hour & W I T H O U T special materials What you need You need also: a blade cutter, scotch tape, sandpaper, kitchen paper, cotton wool, vice, hacksaw. How it works Ham Radio The ARRL Repeater Directory® ...Powered by TravelPlus™NEW 2014-2015 Edition One for the Road... Now the best directory of frequencies for the 23,000+ Amateur Radio repeaters around the country is available to you…anytime…anywhere. Containing the entire ARRL Repeater Directory and powered by TravelPlus you can now...

Amateur radio An example of an amateur radio station with four transceivers, amplifiers, and a computer for logging and for digital modes. On the wall are examples of various awards, certificates, and a reception report card (QSL card) from a foreign amateur station. Amateur radio (also called ham radio) is the use of designated radio frequency spectra for purposes of private recreation, non-commercial exchange of messages, wireless experimentation, self-training, and emergency communication. The term "amateur" is used to specify persons interested in radio technique solely with a personal aim and without direct monetary or other similar reward, and to differentiate it from commercial broadcasting, public safety (such as police and fire), or professional two-way radio services (such as maritime, aviation, taxis, etc.). History[edit] An amateur radio station in the United Kingdom.

Kenwood TS-140S Transceiver - RigReference.com (5.0/5) Add a review / View all reviews Desktop Shortwave Transceiver The Kenwood TS-140S is a high performance HF transceiver designed for SSB, CW, AM and FM modes of operation on all amateur bands (160-10 Meters). This compact, lightweight unit features an outstanding 500 kHz to 30 MHz general coverage receiver with superior dynamic range. The dual 10 Hz step digital VFOs operate independently of each other. 31 Memory channels can store frequency, mode and narrow-wide information at CW mode. 10 Memory channels (CH10 to CH19) store transmit and received frequencies independently allowing repeater or split frequency operation. 11 Memory channels (CH20 to CH30) establish the upper lower limits for band scanning. The scanning speed is adjustable.

North American 50 Mhz Beacon Map by K9MU Map DataMap data ©2014 Google, INEGI, Inav/Geosistemas SRL Map Data Map data ©2014 Google, INEGI, Inav/Geosistemas SRL Capacitor uF - nF - pF Conversion Chart Capacitors and Resistors for Tube Electronics - JustRadios Capacitor uF - nF - pF Conversion Chart When reading schematics, repairing radios and buying capacitors, you often must convert between uF, nF and pF. Paper and electrolytic capacitors are usually expressed in terms of uF (microfarads). Short forms for micro farad includeuF, mfd, MFD, MF and UF. Ham Radio Glossary Safety interlock -- A switch that automatically turns off ac power to a piece of equipment when the top cover is removed. Schematic symbol -- A drawing used to represent a circuit component on a wiring diagram. Selectivity--The ability of a receiver to separate two closely spaced signals. Sensitivity--The ability of a receiver to detect weak signals.

NOVA The 100-Year-Old Idea That Could Change Flight Inspired by birds, bats, and the Wright brothers, engineers are building the next breakthrough in aviation. From NOVA Next | Feb 22, 2017 Key Brain Regions Found To Be Smaller in People With ADHD In the largest study of its kind, research shows people with ADHD have smaller brain regions—including the amygdala, which is responsible for regulating emotions. From NOVA Next | Feb 17, 2017

Minima The Minima is an amateur radio transceiver designed by Ashaar Farhan. Characteristics Its main characteristics are: General coverage: 0 to 30 Mhz Single Side Band modulation and CW Output power of about 1 W with the original amplifier (more on that later) The frequency is set by a Si570 Digitally Controlled Oscillator An Arduino-style micro-controller is used to control the front-panel and drive the oscillator which makes the entire project very easily hackable If you are interested in this project:

Electronics Contents of Electronics section My Audio Sweep Generator Article from "Electronics World and Wireless World" My "Circuit Ideas" from "Electronics World and Wireless World" A few notes about 555 timers Ham Radio Jargon, Abbreviations and Terminology This is an informal listing of Ham Jargon -- The opinions of AC6V Only. Not to be used as a definitive source. Caveat Lector.

How to Remove Trovi / Conduit / Search Protect Browser Hijack Malware If your computer has been hijacked with an obnoxious malware that won’t let you change your home page, there’s a strong chance you’ve been infected with the Trovi Search Protect malware, which used to be known as Conduit. Here’s how to remove it. How do you know this is malware? Instead of installing like it should, as a Google Chrome Extension, you’ll probably see that your extensions list doesn’t mention Trovi or Conduit at all.

Related:  RécupérationHAM OR, AMATEUR RADIORadio amateursham radio