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.

Wednesday, June 21, 2017

Odd differences between two (nearly) identical PV systems

I've had my 18-panel (two groups of 9) PV (solar) electric system in service for about a year and recently I decided to expand it a bit ...

Tuesday, June 13, 2017

Adding a useful signal strength indication to an old, inexpensive handie-talkie for transmitter hunting

A field strength meter is a very handy tool for locating a transmitter, but a sensitive field strength meter by itself has some limitations...

Wednesday, May 17, 2017

Teasing out the differences between the "AC" and "DC" versions of the Tesla PowerWall 2

Being naturally interested in such things, I've been following the announcements and information about the Tesla PowerWall 2 - the follo...

Saturday, April 29, 2017

An RV "Generator Start Battery" regulator/controller for use with a LiFePO4 power system

I was recently retrofitting my brother's RV's electrical system with LiFePO 4 batteries ( ReLi 3 on RB-100's). This retrofit...

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