Thursday, March 16, 2023

A Very Cool Video with NanoVNA, FFT, LC circuits, W2AEW, CuriousMarc, Back-to-Back 1N4148s, and String-Powered Gyroscopes

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Don't let the scary nuclear chemistry title put you off -- there is a LOT of very familiar homebrew stuff in this video.  You will feel ...
1 comment:
Wednesday, March 15, 2023

Listen to Pete Juliano on His Daughter Gina's Podcast -- Pete Discusses Rock Music and Life

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https://podcasters.spotify.com/pod/show/gina-juliano/episodes/Mission-To-Music-This-Is-What-You-Need-To-Do--Episode-2-e20a6bs/a-a9ft547 This...
1 comment:
Tuesday, March 14, 2023

Fixing the Tuning Problem in the High-School Direct Conversion Receiver (with video)

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Here is the problem:   For the capacitive element in the LC circuit we have essentially two 660 pF caps in series.   This results in a tot...
10 comments:
Saturday, March 11, 2023

A Great Lecture on Calculus -- With Discussion of Maxwell

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1 comment:
Friday, March 10, 2023

Troubleshooting an Intermittent with Mr. Carlson. And Troublesome Tube Re-Branding.

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This is a really great video on how Mr. Carlson (VE7ZWZ) did troubleshooting on a tube-type receiver. The problem was an intermittent.  They...
3 comments:
Tuesday, March 7, 2023

SolderSmoke Podcast #244 PETE IS BACK! TR-7, CK722, BFR106, HP8640B, High-School Receiver, 10 Min TX, MAILBAG

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SolderSmoke Podcast #244 Is available: http://soldersmoke.com/soldersmoke244.mp3 Video version at: (118) SolderSmoke - YouTube HE’S BACK! ...
1 comment:
Monday, March 6, 2023

Pictures from Farhan's Hyderabad High-School Direct Conversion Workshops

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  Farhan came up with the idea of having high school students build their own receivers.  We followed his lead -- there are now several such...
Sunday, March 5, 2023

Farhan's High-School Direct Conversion Receiver Workshops in India

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Farhan sent this picture yesterday.   If you look closely you can see the students holding their homebrew 40 meter Direct Conversion receive...
7 comments:
Saturday, March 4, 2023

Fourier Analysis Explained (video) -- Understanding Mixers

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Over the years we'vE had a lot of posts about Joseph Fourier:  https://soldersmoke.blogspot.com/search?q=Fourier Recently I've found...
Friday, March 3, 2023

My HP8640B Signal Generator Lives Again

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I'd really come to like this old signal generator.  The construction is superb.  It was built to be repaired.  As you open it up you fin...
9 comments:
Tuesday, February 28, 2023

A Couple of New Digital Multimeters: a Fluke and an AstroAI

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Our high school direct conversion project made me realize that I really need to upgrade my digital multimeter. I've been using an old Ra...
5 comments:
Sunday, February 26, 2023

First QSO with the High-School Receiver -- 100 mW to Dipole. (with videos) -- Homebrew to Homebrew!

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   Alan W4AMV in Raleigh NC Dean KK4DAS and I have been working with a local high school.  The students are building a direct conversion rec...
7 comments: