Michael Katzmann🐈
vk2bea@mastodon.radio
<p>Electronics engineer & radio amateur - NV3Z, VK2BEA & G4NYV.<br />ex ATN7 Sydney / Broadcast Sports Tech. / Library of Congress</p>
Posts
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The official White House Android app has a cookie/paywall bypass injector, tracks your GPS every 4.5 minutes, and loads JavaScript from some guy&#39;s GitHub Pages. https://thereallo.dev/blog/decompiling-the-white-house-app
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@samlitzinger@journa.host I remember a colleague who lamented that the real time commentary of the Space Shuttle Challenger disaster lacked the emotion of Herb Morrison's coverage of the demise of the Hindenburg. Without pictures if fell to the radio man to convey so much more.
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Upon checking a large electrolytic capacitor this morning, I was disappointed that it showed an ESR (25 mΩ) higher than spec (6mΩ) Upon further reflection I realized that although I had calibrated the instrument, I neglected to include the connecting wires. Sometimes every milliohm matters! It&#39;s not just an electrolytic - its an 622D &#39;Extralytic&#39;! (big thanks to @bitsavers for preserving the Sprague catalog!)
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@samlitzinger I&#39; think it&#39;s a bulk tape eraser. (but that is just an educated guess!)
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@samlitzinger mmm .. maybe I&#39;ll suggest that my friend de-Tesla his car (Tesla is the SI unit of magnetic flux - Gauss is the older MKS unit 😉 )
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Removal of the 15th Street bike lane stopped by the court. https://ecf.dcd.uscourts.gov/cgi-bin/show_public_doc?2026cv0988-33 …the Removal Project may not and will not proceed on April 23, 2026. #washingtondc #bike
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Oh, great.. another headache. Iran war disrupts the circuit board supply chain, raises costs for tech firms https://www.reuters.com/world/middle-east/iran-war-disrupts-the-circuit-board-supply-chain-raises-costs-tech-firms-2026-04-27/
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There is a pivotal scene in the 1959 movie &quot;On the Beach&quot;, where the submarine crew investigates the source of a Morse code transmission emanating from a post apocalyptic San Diego. On seeing this again today, I realized that the key is the same model as the one I have; a P.M.G. (Postmaster General&#39;s Dept) 1940 WT #2 The movie was shot in Melbourne, so these keys would have been even more common then than they were when I learnt Morse in the 70&#39;s.
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The GNSS spectrum... https://safran-navigation-timing.com/wp-content/uploads/2025/12/GNSS_Spectrum_POSTER_01-12-2025.pdf
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Tuesday tip..... How to clean the center pin socket of a BNC or N connector... Use a dental soft pick and contact cleaner (or IPA). Its cheap, fits perfectly and is non abrasive.