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A Secret Little Adventure Ham Radio Blog

Koolertron For The Win, Or How My Cruddy Understanding Of Signal Generators And Oscilloscopes Led Me To Believe Mine Was Messed Up…

March 31, 2024 by KM1NDY

The mark of an expert is knowing not simply what you know, but knowing what you don’t know. There are things in life I am truly an expert in. Electricity is decidedly not one of those things. For every new tidbit I learn, a door opens to reveal a seemingly infinite number of topics I …

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Generating Bad Signals And The Story Of The Poorly Tested Butterworth Bandpass Filter

March 31, 2024 by KM1NDY

(New follow-up post here!) How hard could it be to construct a little band pass filter, throw a signal through it, and see if it properly attenuates? A breadboard, a small handful of components, an online filter design tool. Fifteen minutes, tops? I was longing for the pleasurable jolt of satisfaction that one only gets …

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How To Do Vector Calculations With Polar Coordinates On The TI-84 Plus CE Calculator

March 3, 2024 by KM1NDY

I would be absolutely lying if I told you that the polar coordinate functions of my beloved TI-84 Plus CE calculator were anything less than horribly annoying. Like a lot of math, and math calculators, there are roughly 3312 (that’s considered the “KM1NDY number”,i.e., K#, for those learning the most avant garde methods of mathematics) …

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Five Years Of Electromagnetic Bliss! Happy Ham Birthday To Me!!

February 20, 2024 by KM1NDY

Sending out a flurry of sinusoidal waves to those important people who share this lovely day with me! Love you guys!

Thirteen Points: Tecumseh

February 11, 2024 by KM1NDY

Solidly in the back nine now…

How To Analyze A 49:1 Impedance Transformer (Unun) Using A NanoVNA For An End-Fed Halfwave (EFHW) Antenna Build

February 7, 2024 by KM1NDY

Along my journey on understanding radio, electronics, and in particular, the magic of baluns, ununs, and other transformers, I came across this helpful video on how to analyze a 49:1 unun with a NanoVNA. I replicated it with the the “Alleyway Antenna” transformer. This one below…unfortunately I did not take a lot of pictures of …

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How To Upload Files To An Arduino Uno Using The Linux Terminal With Vim, GCC, and C-Programming: Classic Blink Without The Arduino IDE

January 23, 2024 by KM1NDY

These are the written steps and code necessary to upload C programs to an Arduino Uno through the Linux terminal without needing to use the Arduino IDE. I am most certainly NOT the originator of this, and proper credit goes to the “Low Level Learning” Youtube channel, and specifically this video entitled “Getting Started with …

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Another Girls Getaway – The ARRL SSB Sweepstakes!

December 11, 2023 by KM1NDY

Well it wasn’t the CQWW SSB, but it was another girls getaway nonetheless. Though this time, it was without my beloved sweet pup Nellie, who passed away last spring. Georgia, who does her very best to constantly remind me she’s not Nellie, and I gathered up our gear and headed off to the Salisbury Beach …

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Alleyway Antenna Analysis: The Ever-Present Trials Of The Urban Ham

December 11, 2023 by KM1NDY

It certainly feels a bit like I am going back to my roots lately with scrappy little antenna projects strung up along the fence in my alley. Yup, that is a giant trash barrel I am using as a table top. A lady ham’s gotta do what she’s gotta do, ya know? If you are …

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Clean-Up Duty At The Folks’ Homestead…TIMBER!!!

December 11, 2023 by KM1NDY

About the only thing I like more than chainsawing is chipping wood. So it is always a pleasure when my parents find me even a little something to cut down.

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