Archive for May, 2020:

2020-05-22 PIM Passive InterModulation Explained

Good article on passive intermodulation, AKA the Rusty Bolt Effect. https://www.electronics-notes.com/articles/radio/passive-intermodulation-pim/what-is-pim-basics-primer.php

2020-05-19 Transistor Tester And Other Components

Here is a writeup from another radio enthusiast about his newly purchased Mega 328 uC based component tester. They come in handy for testing electrolytic capacitors especially for ESR – equivalent series resistance. The tester will also test silicon and germanium transistors, handy for making a judgment on how leaky it is. I have a

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2020-05-14 Low Quality LEDs From Small Vendors

from FB comment in Vintage Transistor Radios Pablo E. Laredo I used to buy LEDs from small vendors on eBay. I found that most of the 5mm LEDs that I got from the small vendors were seconds, the chip wasn’t centered so the beam was off center, or there were bubbles in the clear epoxy

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2020-05-16 Renewables

The actual costs of the new NPPs (Vogtle in the US and Okiluoto in Finland) have gone far overbudget – tens of Billions of dollars, plus years of delays. It’s not antinukers, it’s huge cost overruns and delays that are preventing investors from building new NPPs. NPPs are not capable of competing against renewables. The

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2020-05-10 Mail-in Ballots And Voter Fraud

The claim that mail-in ballots help voter fraud is a false pretense. The reason why people (mostly Republicans) don’t want states to allow mail-in ballots is because it makes it more difficult for low-income, disabled, minority and hourly workers to cast their ballots. It is an attempt by the mail-in opponents to tilt the playing

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2020-05-08 Complex Relationship — What Things Really Are

I’m reading ’The Gene’ by Siddharta Mukherjee, an excellent book about how we are made — what makes us. I read the following paragraphs and it occurred to me that people don’t understand the importance of this. ******************* p.196 “The geneticist Antoine Danchin once used the parable of the Delphic boat to describe the process

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2020-05-04 Windows Backwards Compatibility With MSDOS

This 8 min YouTube video talks about why you can’t name a file CON in Windows 10 but after the 4 minute point he talks about being backwards compatible with earlier versions of Windows and even MSDOS which had to be used with Windows 3 and earlier. He points out that Excel still has a

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2020-05-03 Testing For Fake UV-C Sterilizing Lamps

There are lots of UV lights being advertised on social media that use LED lights and claim to sterilize the Corona Virus. These are not putting out UV-C light which is necessary for killing germs. This video shows that the LED lights put out no UV-C, but put out UV-A or UV-B. Beware, bbecause these

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2020-05-01 UFO Detector And Sighting!

Photo from ?? Thanks, Mike Guerrucci. This is a simple device. That means it’s just a buzzer and a battery. And it has a super sensitive magnetic switch. This detector is always open until it is disturbed by a magnetic field. They call it a magnetometer. One way to make this is to use a

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