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Trinity County Amateur Radio Club

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Home→Categories HF

Category Archives: HF

World Radiocommunication Conference Approves Global 60 Meter Allocation!

Posted on November 19, 2015 by adminNovember 19, 2015

11/18/2015 The Plenary Meeting of the 2015 World Radiocommunication Conference (WRC-15) in Geneva has approved an allocation of 5351.5-5366.5 kHz to the Amateur Service on a secondary basis with a power limit of 15 W effective isotropic radiated power (EIRP). … Continue reading →

Posted in ARRL, HF, News | Tagged ARRL News, FCC, Ham Radio, News

X2-class solar flare causes radio blackout

Posted on May 6, 2015 by adminMay 6, 2015

Emerging sunspot AR2339 unleashed an intense X2-class solar flare on May 5th at approximately 22:11 UT. Radiation from the flare caused strong radio blackouts on the Pacific side of Earth, interfering with communications at frequencies below ~20 MHz. The blast … Continue reading →

Posted in General Information, HF, ionosphere, Propagation | Tagged CME, Solar Flare, Space Weather

Armed Forces Day 2015 Crossband Communications Test to Offer New Modes

Posted on April 30, 2015 by ARRLApril 30, 2015

The annual Armed Forces Day Crossband Communications Test set for Saturday and Sunday, May 9-10, will offer Amateur Radio operators a chance to try their hand at using more modern military communications modes, such as MIL-STD Serial PSK. Also new … Continue reading →

Posted in ARRL, HF, News | Tagged ARRL News, Ham Radio

An Amateur Radio Operator’s Guide To Understanding HF Propagation

Posted on March 19, 2015 by adminMarch 22, 2015

There are many websites offering charts and graphs related to HF propagation conditions http://www.swpc.noaa.gov/. These display measurements of solar activity and their impact on Earth’s magnetosphere, ionosphere and atmosphere. On NOAA’s web site, there is a tremendous amount of information … Continue reading →

Posted in HF, ionosphere, Propagation | Leave a reply

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  • Forum
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  • Knowledge Base
    • Amateur Radio Related Organizations
    • An Amateur Radio Operator’s Guide To Understanding HF Propagation
    • Build an Inverted Vee Antenna
    • Cal Fire Frequencies
    • Calling Frequencies Commonly Used by QRP Amateur Radio Stations
    • ITU Phonetics for Net Use
    • JT65-HF JT65A JT65 HF Frequency Information Digital Mode LF-MF-HF-VHF
    • Net Script
    • Nets
    • Q-Signals Commonly Used On HF
    • Scanner Frequencies
    • VHF/UHF/HF Emergency Frequency List
  • Trinity County ARES Contacts
    • ARL Numbered Radiograms

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