Showing posts with label TJ DC RX. Show all posts
Showing posts with label TJ DC RX. Show all posts
Sunday, February 4, 2024

Scott KQ4AOP Successfully BUILDS a Receiver (Video) -- This is the Homebrew Spirit at its Maximum

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This is just so cool.  Scott KQ4AOP has successfully homebrewed a ham radio receiver.  He used the circuit Dean and I developed (with a lot ...
12 comments:
Friday, February 2, 2024

First Light! First Signals received on Version II of Homebrew 15-10 Transceiver

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Ianis S51DX in Slovenia was the first call sign heard. Some peaking and tweaking remains to be done, but the receiver is working. Congra...
4 comments:
Saturday, October 14, 2023

Paul VK3HN's Video on Scratch-Building and SOTA

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It was great to get a comment from Paul VK3HN -- this led to a re-establishment of contact.  Apparently Google knows who I have been e-maili...
Sunday, September 17, 2023

"The Art of Electronics" Post #2 Interview with Lady Ada (Video)

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I posted this video back in 2015 ,  but it is so good that it is worth watching again.  This is especially true now that I have the second e...
Monday, June 12, 2023

Germany: Direct Conversion Receiver Success!

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Dear Bill, Please my apologies for my late update on our DCR project. We started with the course in the semester break and once the semester...
14 comments:
Thursday, June 8, 2023

Canadian Build of the Direct Conversion Receiver -- Do This in Your Town! (Video)

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This is so cool.  We have been getting reports from Daniel VE5DLD up in Regina, Saskatchewan, Canada.  Daniel is a teacher and he has been b...
Wednesday, May 24, 2023

Farhan Speaks to Students about Satellites and Direct Conversion Homebrew Receivers (audio)

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In our talks at the local high school we have frequently mentioned Ashhar Farhan, his Cubesat experience, and his use of a direct conversion...
Friday, May 19, 2023

Two Videos from Farhan's Visit (more to follow)

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Wednesday, May 17, 2023

Farhan Visits Northern Virginia En Route to FDIM (Videos to Follow)

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Mike KD4MM, Farhan VU2ESE and Dean KK4DAS Farhan VU2ESE was in Northern Virginia this week, on his way to the Four Days in May Event at the ...
4 comments:
Friday, April 28, 2023

High-School Students Successfully Avoid THE SHELF OF SHAME -- Update on the Direct Conversion Receiver Project

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One of the first finished receivers Dean KK4DAS, Mike KD4MM, and I had a good day at the local high school yesterday, even after a month of ...
3 comments:
Saturday, April 1, 2023

SolderSmoke Podcast #245: Cuban DSB, DC Receiver?, Can you spot the AI? (Prize), Winterfest Loot, Gina's Podcast, 6BA6 buy, MAILBAG

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  DC RX Example by KK4DAS SolderSmoke Podcast #245 is available for download:  Audio Podcast:   http://soldersmoke.com/soldersmoke245.mp3   ...
12 comments:
Thursday, March 30, 2023

An Antenna for the High-School Direct Conversion Receiver (and Next Steps in the Project)

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We have reached the point where we have to decide on an antenna for the high-school  direct conversion receiver.  It needs to be simple and ...
Saturday, March 25, 2023

Update on the High-School Direct Conversion Receiver Project: Board #4 Completed

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One of the receivers. (l to r) AF, PTO, Mixer, BP filter The students continue to make great progress on their direct conversion receivers. ...
2 comments:
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:
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...
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:
Saturday, February 25, 2023

Video by KK4DAS on Progress in High-School Direct Conversion Project

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More info in blog post below.  
1 comment:

Progress Report: High-School Students Build Diode Ring Mixers (Board #2 of 4). Hyderabad Soul Added to the New Machines

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Dean KK4DAS works with students A team from the Vienna Wireless Society was back in the local high school Thursday and Friday of this week,...