Friday, October 10, 2025

Does a simple, single diode envelope detector function the same way as a product detector does?

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Mike WU2D has an interesting series of videos on the simple detectors used in crystal radios.  Mike's videos touch on a discussion that ...
8 comments:
Thursday, October 9, 2025

Why I can listen to both sides of VK-G Long Path QSOs in the Dominican Republic

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Bottom line:  I think when Australians talk to Brits via long path,  in the Dominican Republic I am between the two. Both have their beam an...

So Where is My Dominican Antipode?

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There you have it.  I like the icons!   Here is the site:  https://www.antipodesmap.com/#coordinates-converter
Wednesday, October 8, 2025

An Australian Perspective on AI's Impact on the Internet

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https://www.abc.net.au/news/science/2025-10-08/how-googles-ai-overviews-are-affecting-australian-news-websites/105839588 Thanks to Paul VK3H...
6 comments:
Monday, October 6, 2025

Spark Plugs -- With Polonium!

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  Hack-A-Day has an interesting post about how they put Polonium in Firestone spark plugs in the mid 1950s.  Yikes, this is some really dead...
Saturday, October 4, 2025

Faraday Cages and the Square Kilometer Array

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  https://www.theregister.com/2025/10/02/ska_datacenter_construction_progress_report/
1 comment:
Friday, October 3, 2025

More Silicon Valley -- Apple, Microsoft, and IBM (video)

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  More interesting computer history.   -- Visicalc and importance of spread sheets. (I remember when I first learned to use one).  -- Amazin...

Silicon Valley -- The Hippies who Built the First PC (full video)

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Computers are not really my thing, but the discussion of California culture and how it led to the home computer revolution is very interesti...
Tuesday, September 30, 2025

Coronal Mass Ejection Causes Storm -- But I Still Hear DX in Hi7

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  So the A index is 27 and the K is 7.  That's pretty bad right? See below.  Lots of red.  Well maybe not so bad in the tropics.  This m...
4 comments:
Friday, September 26, 2025

Maybe it is Tropospheric Ducting After All -- 99.5 FM WIDI Puerto Rico Received in the Dominican Republic

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  Invest 94L moved arcoss the Mona Passage yesterday, lowering temperatures, bringing lots of rain and relatively high winds to the area.   ...
3 comments:
Thursday, September 25, 2025

GQRP Convention 2025 -- SolderSmoke Direct Conversion Receiver Presentation

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We were really pleased to have been invited to speak to the GQRP club's 2025 convention.  We talked about the SolderSmoke Direct Convers...
4 comments:
Tuesday, September 23, 2025

Flying in the U-2

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So cool.  This was always one of my favorite planes.   
1 comment: