A very nice shot of the James Webb Space Telescope, nearly 1 million miles away, taken from Rome.
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Blogs and Websites and Groups
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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...
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Local ham catchup including Peter, VK3YE - Yesterday, in a Melbourne park, I had the pleasure of a catch up with a bunch of old friends. Ham Radio Home brew hero, Peter, VK3YE, was there and of cour...
6 hours ago -
December 22, 2024. So how do you turn a Direct Conversion Receiver into a Transceiver? - Friends and colleagues, Bill, N2CQR and Dean, KK4DAS, developed a Direct Conversion Receiver project that was featured in "hackaday" and the subject of a l...
13 hours ago -
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Cape Lookout Activation: A Family Adventure and Saltwater Experiment - Last Sunday, my family set out on a trip across North Carolina, from the mountains to the coast. Our destination was Beaufort, a charming coastal town I ha...14 hours 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...1 day ago
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Re: Receiver Mica Disease - You might be seeing the effects of bad silver-mica capacitors. Apparently silver can migrate thru the mica insulation forming little fingers (dendrites) wh...2 days ago
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WI2XLQ: Brian Justin’s annual longwave broadcast starting Christmas Eve and New Year’s Eve - Many thanks to SWLing Post contributor Brian (WA1ZMS), who writes: What has now become an annual LF listening event, WI2XLQ (an FCC Experimental Callsign) ...2 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 ...5 days 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......
1 week ago -
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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...
2 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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The SW200 – A Budget AM Broadcast Processor for LPAM – and Hams Too? - Note that although the audio processor described in this article is intended primarily for Part 15 AM broadcasters, and perhaps also low power licensed AM ...6 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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January
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- Image of James Webb Space Telescope In Position at L2
- "From Crystal Sets to Sideband" -- A Great Book a...
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- Looking at the Galaxy's Spiral Arms with a Dongle,...
- Exorcism Not Quite Complete -- Thinking of Other O...
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Radio Inventor Stamps
On Page 39 of the Nov-Dec 2024 SARC newsletter "The Communicator"
OK as a photographer and space nerd I am impressed! Wow. How cool is that? I was at JPL when the Hubble "contact lens" fix designed and deployed. So excited to see the James Webb taking up its station.
ReplyDeleteAnyone not excited by this project cannot have a drop of geek blood in their body. This is amazing stuff that was only dreamed about a few years ago.
ReplyDelete