We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.

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Attachments - Josh

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Filename Downloads Message Posted
289KHz DGPS.jpg 850 Re: DGPS in longwave band 250 kHz (DGPS - Differential Global Positioning System) February 28, 2016, 0300 UTC
fcc rid mobile unit.jpg 301 Re: Inside an FCC DF van May 05, 2016, 1640 UTC
1_1.jpg 579 Hallicrafters distributed a free 45-RPM swl promotion record in the mid-1960s June 26, 2016, 2234 UTC
solar cycles superimposed.jpg 376 Re: NASA spots monster hole on the Sun July 03, 2016, 1625 UTC
comics-Pokemon-fandoms-blazersatdawn-2827015.png 328 Re: Children Tangled in Dipole After Special Event Station Becomes Pokéstop July 14, 2016, 1712 UTC
latex.png 442 Re: The perfect theme music for today... January 21, 2017, 1718 UTC
index.jpg 337 Re: Al, I've got my cap set on a Geek Goddess.... January 21, 2017, 1726 UTC
deity.jpg 398 Re: The Penguin Brief May 23, 2017, 1723 UTC
cbcsianmcfarland.jpg 319 Re: Unknown Name/Clever Name/Not a Clever Name Radio stations, WTF June 03, 2017, 0302 UTC
dagon.gif 481 Re: "Michael"-5200 USB 0002 UTC August 15, 2017 August 15, 2017, 1619 UTC
batfart.jpg 352 Re: Why can't a man find a good woman anymore? So I think August 18, 2017, 1623 UTC
Skull asteroid.jpg 346 Re: the Arecibo Observatory Planetary Radar has returned to normal operation December 23, 2017, 1940 UTC
screenie.png 1937 Re: SDR receiver basic questions March 03, 2018, 2011 UTC
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HFUnderground T-Shirt
HFUnderground T-Shirt
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