Dan
  • Member for 8 years, 3 months
  • Last seen this week
  • Hoosier in Chicago
Is there a way to listen to live HF communications using the internet?
21 votes

My two favorite locations for listening online are: http://websdr.org/ WebSDR was first conceived as a means to make the 25 m radio telescope at Dwingeloo available to many radio amateurs for EME ...

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OK to use any repeater?
Accepted answer
16 votes

Do you have to get permission? No. Few have issues with guests on a repeater (think of travelers passing through, for instance). In the U.S. they can legally prevent someone from using their repeater (...

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Calculating Antenna Length on the FCC Exam vs. in Reality
4 votes

Legend $c$ = velocity of propogation = speed of light (299,792,458 meters/second) $f$ = frequency $\lambda $ = wavelength Formulas The basic formula for calculating wavelength is: \begin{equation} ...

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How do sunspot numbers (SSN) affect radio operations?
Accepted answer
3 votes

It refers to 'smoothed' sunspot number, and is needed by many software utilities to calculate optimal propagation. This refers to the current number of dark spots on the sun associated with high ...

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What nations do not grant an amateur radio licence?
3 votes

There are numerous regions of the world where there are not well-established governments (some where various competing regimes continually overturn one another or a region is in a state of civil war). ...

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