Showing posts with label mixer theory. Show all posts
Showing posts with label mixer theory. Show all posts
Tuesday, October 14, 2025

Radio Shack, Mixers, Terman

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T his morning while looking to an old book that is still a favorite, I found a footnote to an even older book that is also one of my favorit...
Sunday, October 12, 2025

Understanding Mixers -- A Free Book Excerpt -- Enlightenment from SPRAT

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https://soldersmoke.com/book.htm      We've recently been talking about mixers, and it has become apparent to me that there is a big gap...
6 comments:
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, January 30, 2025

Diode Ring VFO Part II: How Much LO into a Diode Ring?

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Last week we were trying to determine how much LO injection we really need in the SolderSmoke Direct-Conversion receiver .  The answer seeme...
2 comments:
Sunday, January 26, 2025

SolderSmoke Direct Conversion Challenge The Mixer and Diplexer

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SolderSmoke Challenge – Direct Conversion Receiver – the Mixer   The mixer is the heart of the direct conversion receiver.  It’s the circuit...
3 comments:
Thursday, November 21, 2024

Basic Radio Circuitry -- a 1971 film

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This 1971 training film is pretty good.  I like how they break the RF circuitry into just four components, then describe the AM receiver sta...
1 comment:
Monday, October 16, 2023

Does Matching Matter? (Diode Matching for Diode Ring Mixers) -- Nick M0NTV Finds the Answer (Video)

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I n this video, Nick M0NTV takes on a hot topic in ham radio homebrewing:  The matching of diodes in diode ring mixers.   How should the mat...
6 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...