Saturday, February 8, 2025

SolderSmoke Challenge -- Direct-Conversion Receiver Video #5 -- Building the Audio Frequency Amplifier

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  SolderSmoke Challenge – Direct Conversion Receiver – the Audio Amplifier Build and Receiver Demonstration   In this episode Dean, KK4DAS w...
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Thursday, February 6, 2025

SolderSmoke Direct Conversion Receiver Challenge: A Short Video from Dean about the Virtues of Building the AF Amplifier ONE STAGE AT A TIME

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  Dean will soon post his longer video on how to build the fourth and final board of the SolderSmoke Direct Conversion Challenge receiver, b...
1 comment:
Tuesday, February 4, 2025

Mr. Carlson Restores a BC-348 -- But 40 Meters Sounds Very Weak. Why?

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Mr. Carlson mentions that he is a ham radio AMer.  He is also on SSB, but AM is, he says, his preferred mode.  FB.  I got a real chuckle abo...
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Saturday, February 1, 2025

SolderSmoke Challenge – Direct Conversion Receiver – the Band Pass Filter

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  The SolderSmoke DCR challenge is going well.  Our Discord server is bustling with activity and we are impressed that several intrepid home...
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USAF Video: Why SSB is Superior to Ordinary AM

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OK, the title of this blog post has an element of click bait in it.  Just this morning I was listening to the Old Military Radio Net on 3885...
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Friday, January 31, 2025

Update from KK4DAS on the SolderSmoke Direct Conversion Challenge: BP Filter Added to Circuitry -- Full Video on BP Filter Soon

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Dean now has the PTO, the Diode Ring, and now the 40 meter bandpass filter.  Dean fires up his signal generator and, using his 'scope we...

Radio Antenna Fundamentals Part 1 -- 1947 USAF Film

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Lots of good info in this 1947 film.  But... At the end they say that an impedance mismatch between the line and the antenna will result in ...
Thursday, January 30, 2025

Video of images and Data Stream: Huygens Probe Parachuting onto Titan

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This happened back in 2005, but I saw this video for the first time this morning.  I really like the display.  I frequently see Titan next t...
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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:
Tuesday, January 28, 2025

Other Workshops: Making The World's Smallest Motor

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When I watched this very cool video, I thought of all those hams who complain so bitterly about how difficult it is to wind a toriod on a T-...
Monday, January 27, 2025

First 10 Meter AM Contact from Hi7/N2CQR

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I threw this in the bag on the way to the DR, almost as an afterthought.  But I am glad I did.  Today, watching reports on my 10 meter CW be...
1 comment:
Sunday, January 26, 2025

Fireball (Meteor) Over the Dominican Republic

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Click on the link below to see the video https://www.tiktok.com/@william.de.jesus01/video/7464040455185993002 I had been telling Mike WN2A h...
3 comments: