KA7OEI's blog

Random musings - usually on a technical (nerdy) subject - perhaps related to amateur radio and things found at ka7oei.com and modulatedlight.org. No AI is used to generate this content.

Tuesday, March 10, 2015

Update on the mcHF - Adding more features (Part 2) - Implementing audio filters and fractional I/Q phase adjustments

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The front panel display of the mcHF SDR transceiver, an entirely self-contained all-mode HF transceiver based on open-source software. T...

1 comment:

Saturday, March 7, 2015

Using the "RTL.SDR" dongle (with HF port) as found on Ebay

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Some months ago I was perusing the wares of a seller on EvilBay and having decided to purchase one of those all-purpose component testers, I...

5 comments:

Friday, February 20, 2015

A "quiet" 5 volt USB car power supply

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For a previous, related article see the May, 2014 posting - "How USB car power adapters can ruin 2 meter mobile reception" - link ...

7 comments:

Friday, January 30, 2015

Updated version of the "Simple" PWM LED/Laser modulator

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A few years ago, for our friends in the Tucson area, I threw together a "simple" PWM circuit for audio modulation of high power LE...

2 comments:

Tuesday, January 27, 2015

Update on the mcHF transceiver - Adding features to the original code

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For an follow-up article, see this link . It has been a few months since I have posted anything on the mcHF transceiver (my previous post...

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