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Blogs and Websites and Groups
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December 26, 2024. I got a SUV present for Christmas. - Another Christmas and another SUV present -- Sox, Underwear and Vitamins. I did get some neat presents though including a book by Mark Harmon (NCIS alum)....
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Texas Radio Shortwave’s January-March 2025 program schedule - Many thanks to SWLing Post contributor Terry Colgan of Texas Radio Shortwave, who writes: Hi – Here’s our program schedule for the first three months of 20...5 hours ago
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Re: REA Mod Monitor question for Steve, WA1QIX. - Quote from: KD1SH on *Yesterday* at 06:29:13 PM I do indeed know that, but I figured that not only does Steve view and post here regularly, but posing the...9 hours ago
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Slow TV: Portable POTA Hunting at Home - This afternoon, instead of venturing out to a local park, I decided to do a little POTA hunting from home—QRP portable style. It was a fun experience and f...1 day ago
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Manufactured PCB for Termination Insensitive Amplifier - The termination insensitive amplifier described by W7ZOI & K3NHI is a useful building block for the RF home constructor. I've been making these using coppe...
2 days ago -
Micropower AM Broadcasting – A Scratch-Built SSTRAN AMT3000 - 14 years ago (where does the time go?) I was looking for a way to broadcast very locally, to my neighborhood, legally. The operative word was legally and, ...
2 days ago -
Finding Your Best Crystal Radio 'DX Diode' (Part 2) - Readers may recall my summertime blog, "*Finding Your Best Crystal Radio ‘DX Diode'*". It described a theoretical method I tried in order to see which o...
3 days ago -
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Perplexity AI calculating Zo of a two wire transmission line – comparison with measurement – updated - During the process of writing the article Analysis of output matching of a certain 25W 144MHz PA an estimate was made of the characteristic impedance Zo of...4 days ago
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HRWB 225 - QRP Radio Design with Jonathan KM4CFT - In this episode we meet Jonathan Kayne, KM4CFT, the designer of a very popular new QRP radio called the CFT-1. Jonathan shares his journey from concept ...1 week ago
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QRP HomeBuilder rebrands to Popcorn Electronics - Greetings Friends! Well, it's time to re-imagine QRP HomeBuilder. I'm going back to the beginning and rebranding as Popcorn Electronics. This was the si...
1 week ago -
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6474km TEP contact on 144 MHz from Argentina to a ship off the coast of Florida - 9th Dec 2024 - Over the last few years, I've reported on many *Trans-Equatorial Propagation* (TEP) contacts from South America to the Caribbean on the *144 MHz* band......
2 weeks ago -
Frequency response of the RX-888 SDR at the high and low ends (above 30 MHz and below 1.5 MHz) - *Figure 1:* The RX-888 Mk2. The RX-888 Mk 2 *(hereafter referred to as the RX-888 or '888) *is a versatile device, essentially providing a means by which...
3 weeks ago -
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WA2JMG - Episode 524 - Charles “Pete” Corp - WA2JMG Charles “Pete” Corp, WA2JMG, operates simple rigs into wire antennas, using low power. His primary operating mo...5 weeks ago
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The November - December 2024 SARC Communicator - *Another BIG issue* The final issue of the year. The November-December Communicator, digital periodical of Surrey Amateur Radio Communications is now avail...1 month ago
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Hollow-State Design, 3rd Edition - Hollow-State Design, 3rd Edition is available from: Lulu Press: tinyurl.com/hollowstatedesign3 eBay: search for “hollow-state design” Electric Radio bookst...2 months ago
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I Finally Bought My Dream Airplane - Aviation has been a love of mine since I was a very little person. Living in Nevada, seeing posters and ads for the Reno Air Races, specifically the Texa...2 months ago
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2000 47pF Caps ... - An unexpectged package arrive in the mail today. Did you ever wonder what 2000 47pF NP0 capacitors look like? Thanks to John, AB2XT I will never run ...
3 months ago -
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January 13, 2024. Just Technical Stuff Today. - https://n6qw.blogspot.com Our New Home!11 months ago
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New QRP Cluster From OM0ET and OM6APN - By DX EXPLORER DX EXPLORER Paul OM0ET and Peter OM6APN recently launched a new cluster dedicated to QRP operations. Have a look and I hope you will enjoy...1 year ago
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Daylight Again – An all Analog Radio - What’s all this? In 10 seconds, A high performance, 7MHz, 5 watt SSB rig Draws just 24 mA of current 90 dB dynamic range, 80 dB close-in dynamic range 3D ...2 years ago
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New post: A “Walkie-Talkie” SSB transceiver for 14MHz or the higher RF bands - To access this article, please click link: A “Walkie-Talkie” SSB transceiver for 14MHz or higher rf bands2 years ago
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Other Electronic Projects • Re: Can I normalize both Mono Amp Outputs? - radm49 wrote: ↑ Mon Apr 25, 2022 3:56 am qmavam wrote: ↑ Thu Apr 21, 2022 8:57 pm Yes, you can use a wall wart for power, you might need to add a capacit...2 years ago
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Digi-chirp! Digital synthesis of ‘nostalgic’ CW - The bottom ends of 80, 40 and 20m are not what they used to be. For starters, the busiest part is the digital segment where computers talk to computers – l...3 years ago
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SMA Torque Wrench for the NanoVNA (uncalibrated) - I have been using SMA connectors on most of my projects, and have occasionaly gotten a slightly different reading than I had expected. Using the NanoVNA, ...
4 years ago -
40m SSB Tramping Rig - Please see my YouTube channel for details of the build. http://www.youtube.com/c/CharlieMorrisZL2CTM *2N3904 Antenna Amplifier (initial)* Voltage gain is ...
5 years ago -
Modifications to the Dayton/FDIM-2019 Antuino - The Dayton Antuino has sub-optimal performance. This is a short note on improving it to an 80 db range of measurements. The trouble with Antuino 2.0 (the o...5 years ago
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Raduino as NBFM TX - Here is a neat, 30 minute hack for your Raduino to turn the Si5351 into a pretty stable, solid NBFM transmitter. The hack is to add a varactor diode in ...
7 years ago -
QRP Labs shop! - [image: Shop] All QRP Labs kits may be ordered online securely at the shop, with PayPal payment. *Click here to visit the shop!* *Click!* *Shop! Order...9 years ago
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Hans Summers Homebrew Radio, Electronics and Computing - Radio, Electronics and Computing Projects by Hans Summers I make no claims for technical accuracy, good design, or necessarily even originality for the co...15 years ago
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E. Howard Armstrong on a Czech Stamp
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2011
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January
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- Great News! Internet outage!
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- Our Kind of Contest: "Eight Pins, One Shot!"
- NASA NANO-Sail Found by Hams!
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- Einstein and Lead-Acid Batteries
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- Grote Reber, Radio Astronomy, and Tasmania
- ECHOLINK and WINE: Works very well
- The Arduino Documentary
- SolderSmoke Podcast #129
- Black Boxes No More! Cracking Open CPU Chips!
- 10% Discount Coupon for SolderSmoke -- The Book
- Solar Flux Graph
- Propagation Improving
- More WSPR DX
- A Blast from the Past: THE HAMMARLUND HQ-100
- If You Could SEE The Night Sky at Radio Frequencies
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January
(22)
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Radio Inventor Stamps
On Page 39 of the Nov-Dec 2024 SARC newsletter "The Communicator"
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