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, November 17, 2020

Interesting signals on the 20 meter band: Probable Radio Habana Cuba transmitter malfunction - not jamming

›

I happened to be looking at the various receivers at the Northern Utah WebSDR - as I'm wont to do (since I maintain them!) and noticed...

2 comments:

Saturday, November 14, 2020

A high-current DC (and AC) noise filter for UPS or RV use

›

A friend of mine (Glen, WA7X) acquired a 16 kVA UPS (for free!) a year or so ago - a commercial system consisting of four hot-swappable 4 k...

Thursday, October 22, 2020

Using the jt9 executable to receive FST4W signals

›

Note: Since originally posted, WSJT-X v2.3.0-rc2 was released, adding a feature to the "JT9" executable that simplifies this p...

2 comments:

Saturday, September 26, 2020

Revisiting the "Limited Attenuation High Pass" filter - again.

›

In several previous posts (See: " A Limited Attenuation High Pass Filter " and " Revisiting the Limited Attenuation High Pas...

Tuesday, September 15, 2020

Comparing the "KiwiSDR" and the "RaspberrySDR" software-defined receivers

›

Updates: The RaspberrySDR schematic and a fork of the source code is now available - see the addendum near the end of this article for comm...

21 comments:

‹

›

Home

View web version