Showing posts with label TJ DC RX. Show all posts
Showing posts with label TJ DC RX. Show all posts
Wednesday, December 11, 2024

An Evening Bandscan on 40 Meters using the High-School Direct-Conversion Receiver

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This video shows how useful this receiver really is.  Build one of these!
2 comments:
Monday, December 9, 2024

Listening to 40 meters on the DC Receiver -- And I Heard a Distinguished Homebrewer!

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I made the video above to show postential builders how useful our Direct Conversion receiver really is.   Late in the video (starting at 11:...
1 comment:
Sunday, December 8, 2024

"The Build Is the Initiation" -- KQ4AOP Offers Encouragement and a PTO Coil Form for Receiver Builders

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Scott KQ4AOP put a comment on a recent SolderSmoke Blog post that I found especially encouraging and apprportiate. He was writing about his ...
Wednesday, December 4, 2024

Challenge Accepted! Why we Designed the High-School Direct-Conversion Receiver the Way we Did

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Dean KK4DAS's Beautiful DC Receiver The folks over at Ham Radio Workbench have graciously accepted the challenge issued in our last podc...
2 comments:
Friday, November 22, 2024

Tezukuri and Chappy Happy -- Amazing Videos on Homebrew Radio (from Japan?) - Another 40 Meter Direct Conversion Receiver

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So around the time we were building 40 meter direct conversion receivers, someone else was doing something similar.  His product (above) is ...
3 comments:
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...