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.

Friday, January 30, 2015

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

›

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

›

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...

Wednesday, December 24, 2014

Noisy fan on my Owon DS7102V Digital Oscilloscope

›

A bit over two years ago I got one of those inexpensive, Chinese-made digital oscilloscopes to supplement my old, trusty (and still working!...

4 comments:

Sunday, November 23, 2014

My first coherer

›

Recently the topic of the meeting of the Utah Amateur Radio Club was on "old" radio. Really old radio, which is to say "rad...

2 comments:

Wednesday, October 15, 2014

The "Pointless" 10 meter DSB QRP transmitter

›

Figure 1: The slightly-modified "Shake Light" and the "pointless"transmitter. The flashlight portion still works! C...

1 comment:

Wednesday, October 1, 2014

What to do if your IFR 1200 Service Monitor display just shows "@" signs on the display - and if your deviation meter goes non-linear...

›

Figure 1. A properly-working IFR-1200 in receive mode. A few months ago the old IFR FM/AM-1200S service monitor on the bench at work st...

18 comments:

‹

›

Home

View web version