Sunday, November 27, 2022

Mr. Carlson's New Lab and Workbench

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I am very glad to see that Mr. Carlson is NOT slowing down.  In fact he has built another lab and is ramping up.  FB!  
4 comments:
Saturday, November 26, 2022

Another Trivial Electric Motor

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The above video popped up on the BBC channel a few days ago.  Three cheers for the Beeb for doing this, but I'd like to point out that w...
Monday, November 21, 2022

The TinySA ULTRA: Audio out! 200 Hz Resolution! Works Up to 6 GHz! Bigger Screen! (Video)

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The improved resolution could be useful -- we may now be able to see the sidebands coming out of a mixer that is producing AF out (as in a D...
1 comment:

A Homebrew LM386 -- Does Anyone Want to Build It? Help Save Us All from the Indignity of ICs!

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  I recently commented that I was building a discrete LM386 for a Direct Conversion receiver.  I think I was exaggerating my project.  In fa...
8 comments:
Sunday, November 20, 2022

Watching Shortwave Broadcast Stations on the TinySA Spectrum Analyser

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November 18, 2022 1244 UTC. I was using a TinySA spectrum analyzer to look at noise levels on the 40 meter ham radio band. I also wanted t...
3 comments:
Saturday, November 19, 2022

A 1966 73 Magazine Article on a Homebrew Permeability Tuned Oscillator (PTO)

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In April 1966, Lewis Fitch W4VRV of Columbus, Ohio built a Permeability Tuned Oscillator.  It is remarkably similar to the devices we are bu...
1 comment:
Friday, November 18, 2022

The 2Q -- A Homebrew Solid-State Drake 2-B from 1967

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This is really an amazing project.  Way back in 1967 (that's 55 years ago) John Aggers W5ETT of Ponca City, Oklahoma decided to homebrew...
5 comments:
Thursday, November 17, 2022

SDR Direct Sampling: The End of Homebrewing (as we know it)

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I sometimes hear hams claim that our efforts to build simple direct conversion receivers are "very relevant" to modern technology ...
4 comments:
Tuesday, November 15, 2022

Amazingly Cool MONTV Video on Direct Conversion Receivers with Glue Stick PTOs

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I think this is one of Nick's best videos. And he has made a lot of good ones.  https://www.youtube.com/watch?v=xl9dnajkYO0 This is a re...

A Treasure Trove of Permeability Tuned Oscillator (PTO) Info and Links (Plus Info on Direct Conversion Receivers)

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There is really great info on this page , and even more in the links at the bottom of it.  While the page is about PTOs, the links often dis...
1 comment:

Dhaka Jack Moves to France

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Jack Welch AI4SV has been an important member of the SolderSmoke community for many years .  I remember fondly our Straight Key Night CW con...
1 comment:
Wednesday, November 9, 2022

Direct Conversion Receiver -- Simple 2-Diode Mixer Defeats Radio Marti, but Diode Ring is the Best

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  Here is another update on Direct Conversion receiver construction. In Northern Virginia we get very strong signals from the Radio Marti t...
1 comment: