Showing posts with label math. Show all posts
Showing posts with label math. Show all posts
Saturday, March 11, 2023
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Blogs and Websites and Groups
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Travelog: A visit to the Academy Museum 0f Motion Pictures - A non-radio day yesterday, the local family, son Tim, his XYL Amy and daughter Gina had a local outing in LA. The first stop was lunch at the Farmers Marke...
5 hours ago -
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Icom Announces the IC-7300MK2: Improved Performance and Enhanced Connectivity - Icom has unveiled the long-anticipated IC-7300MK2, the next generation of its popular IC-7300 HF transceiver. The new model was officially introduced at th...8 hours ago
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The Power of Shortwave Radio. And, What Gets Lost with Voice of America? - A terrific edition of the "On the Media" program from WNYC Studios about shortwave radio and what we've lost, not just from the cuts to the Voice of Americ...
17 hours ago -
Re: Online Circuit Sim - No, it's not any sort of AI, and can't "design" anything for you; not even the simplest circuit. It still requires you to know how the components functi...18 hours ago
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Mexico on Shortwave – Then and Now - by Dan Greenall Back in the early 1970’s, a wide variety of Mexican stations could be heard on shortwave as evidenced by the loggings columns in the SPEEDX...1 day ago
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Project TouCans Back on the Air on the San Juan Bautista National Historic Trail - Project TouCans made it back on the HF airwaves last night! I had forgotten that urban POTAs are kind the epitome of luxury here in San Francisco. On ...2 days ago
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Return of F2 layer propagation to the 28 MHz band - Aug 2025 - For the last few weeks, I have been hearing nothing but European signals on the *28 MHz* (10m) band. This is pretty normal as we're in the Summer Sporadi...
3 days ago -
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N0LX - Episode 529 - Jake Groenhof - N0LX Jake Groenhof, N0LX, discovered amateur radio in the 1960s thanks to his uncle’s impressive home station and his father’...1 week ago
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HRWB 243 - Building Go Kits with Vince VE6LK - In this episode, our very own Vince, VE6LK, walks us through the process of figuring out how to build your go kit. Whether your are building a kit for m...1 week ago
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Reducing RF susceptibility for the HamGadgets "Ultra Pico Keyer" - and mimizing RF issues on portable HF stations in general - *Note: * While this article describes a modification of the Pico Keyer to reduce RF susceptibility, it also talks about methods to minimize/reduce RFI-re...
3 weeks ago -
The Communicator July - August 2025 - *A Big One to Last the Summer* We're coming up to our club's 50th Anniversary and this is another big issue, with a look back at our history, great article...
1 month ago -
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The "George Batterson 1935 CW QSO Party" - Summary - The first *George Batterson CW QSO Party* has concluded and the results are in! The "*GB*" was introduced to honor George Batterson (W2GB), who along wi...
3 months ago -
KK4DAS MB 20 Transceiver Complete - The MB 20 transceiver is now complete. The rig is a homebrew 10-watt 20-meter SSB transceiver. The VFO module was an ebay purchase of a salvaged Yeasu...
3 months ago -
A Curious 9 MHz Crystal from Mouser Electronics - Just a quick post to share info about a good 9 MHz crystal sold by Mouser Electronics. I last purchased batches of crystals for xtal IF filters back in 2...
5 months ago -
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40m Pelican Case SSB Transceiver - See YouTube channels for details: http://www.youtube.com/c/CharlieMorrisZL2CTM *Test code for the LCD and Si5351* #include ...
7 months ago -
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...10 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...10 months ago
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Landscapes - %BLOGLNK% Landscapes The post Landscapes appeared first on 28° North Sailing.11 months 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 ...3 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 bands3 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...3 years ago
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A battery powered 50W 160m AM transceiver for your backpack - This project is a compact 160m AM transceiver capable of up to 50 watts of fuly modulated carrier, designed for portable use. The transmitter portion uses...3 years ago
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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...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...10 years ago
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A 2 Transistor Transmitter Powered From a 9V Battery - A couple of days ago I built a simple 2 transistor transmitter on a small piece of PCB material. I used the style of construction that seems to be becoming...14 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...16 years ago
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E. Howard Armstrong on a Czech Stamp
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On Page 39 of the Nov-Dec 2024 SARC newsletter "The Communicator"