If you are like me and sometimes forget if R=E^2/P or E^2P, this chart will help. Very useful.
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Wednesday, February 17, 2021
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Blogs and Websites and Groups
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FreeDV Sunday Morning Australian net - 10 stations - We've just had the FreeDV Sunday morning net (starts at 10:30am eastern time) and 10 stations were at least seen.We had VK3TPM, VK3RV, VK5KVA, VK2BLQ, VK3L...
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New 20M SSB Hybrid Wireless Rig Topology. - Following the decision to start another Hybrid SSB rig, it might be well to elaborate on some of the details. The first detail entails refining some of the...
16 hours ago -
QRP Signals, QRO Joy: A Grandfather’s Cross-Country QRP SOTA & POTA Tour - by Dan (NM3A) Life gives you presents! Our latest arrivals were twin granddaughters, who arrived in Los Angeles, CA, in mid-August 2024. So, of course, we ...16 hours ago
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Re: Poly Paks - Yes, brings back memories. I believe I ordered from them many times starting around 1973 I think. Also, Meshna of Lynn MA. I may be getting them mixed up a...1 day ago
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Carlos’ Illustrated Radio Listening Report and Recording of NHK (July 30, 2025 – Tsunami Coverage) - Many thanks to SWLing Post contributor and noted political cartoonist, Carlos Latuff, who shares the following illustrated radio listening report of a rece...2 days ago
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HRWB 242 - Zero Retries Newsletter & Radio Conference - In this episode we meet Steve and Tina Stroh. Steve is the editor of the Zero Retries newsletter where he writes about all things digital communications...4 days 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...
5 days ago -
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Agent Sonya, SolderSmoke, and Battery Operated High Voltage DC Sources - I knew I saw a video with 9 volt batteries used for arc welding! During the ongoing discussion about Agent Sonya, using 9 volt batteries as a vacuum ...1 week ago
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10m QRSS Challenge: - ON4CDJ in Belgium - 20th July 2025 - Since the start of 2024, I've been trying to see how many *QRSS* signals I could capture on the *28 MHz* band. The QRSS signals are just below the WSPR f...
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WA2TBQ - Episode 527 - Ron Demcko - WA2TBQ Ron Demcko, WA2TBQ, found his way into electronics—and later amateur radio—thanks to the early influence of his older bro...2 weeks ago
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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...
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A Real ZN414! - Recently, I built a simple little TRF receiver for the AM broadcast band using a TA7642, a modern equivalent for a chip that was quite popular with electro...
5 weeks 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...
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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...
4 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 ...
6 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...9 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...9 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 ...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 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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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
Blog Archive
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February
(25)
- Putting the Quarantine Hodgepodge Rig on CW (Video)
- Jean Shepherd Goes to a Hamfest -- And Much More
- Update from the Wizard of Wimbledon -- "Always lis...
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- James West, Inventor of the Electret Mic, has THE ...
- Phasors and the Propeller Analogy from Walla Walla...
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- My Current Rig: The Quarantine Hodgepodge
- Jean Shepherd Works Through a Satellite in a School
- Use Only Telefunken Tubes -- They Are the BEST!
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- Shuji Nakamura -- The Inventor of Juliano Blue LEDs
- The VFO that I am looking for: The Globe VFO deluxe
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SolderStats
Radio Inventor Stamps
On Page 39 of the Nov-Dec 2024 SARC newsletter "The Communicator"
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