KM1NDY
A Secret Little Adventure Ham Radio Blog
Someone mentioned working on a remote control battery on/off switch project. Oh boy! What a darn rabbit hole that sent me down. It seemed quite simple to send a radio controlled signal to a relay, nothing novel really. And of course, I liked the idea of an analog device. Perhaps even operating on 27MHz just …
Hint: The transmission gets built tomorrow!
If my friends jumped off a bridge would I? Well, this is such a nuanced question. First, how high is the bridge? Next, what is under the bridge? Third, who was going to go first? And when someone declares a Summits-On-The-Air “Winter Bonus and Summit-to-Summit Weekend Event” as Bob AC1Z has now done for three …
Much like many items on this secret little site, there is no particular purpose to writing this laboratory report. Often these posts are simply mental exercises, helping me work through concepts, ideas, and projects. This website exists exclusively for my own pleasure. The ability to construct words on a page, arrange photographs at will, and …
Hoping my radio waves make the most of the salt water tomorrow on their way off to foreign lands. I’ve heard the sun may be coughing up a fireball (a.k.a. a coronal mass ejection). This picture shows the stations receiving my 200mW 20M WSPR signal from my home QTH from 1:00 to 4:00 UTC (9pm …
I lost my Nellie eighteen months ago. We had our secret spot along a tidal river. Perhaps you remember some of the old stories I told? Nellie learned a lot about life on these banks. And so did I. My new canine pal came into our life very shortly after the passing of Nellie. A …
From Top to Bottom: Not shown are my RigExpert VNAs, the NanoVNA, the Koolertron 60MHz function generator, the Tacklife 30V 5A variable DC power supply, and handheld digital multi- and LCR meters. On the bench is the Weller WE1010NA soldering station. Oh yeah, and my Elegoo 3D printer. I think its turning into a proper …
It was not all that long ago that I tried unsuccessfully once again to make an AM radio receiver from discreet components and an LM386 low voltage power amplifier. Well, apparently the fifth time is a charm…because THIS ONE WORKS!!! As you can see in the video and pics below, there are only really a …
This was a little rabbit hole. On some amateur radio forum somewhere someone mentioned the MFJ-802B RF Field Strength Meter. This piqued my interest because I had not realized that a field strength meter was a consumer accessible device. Turns out there are all sorts of RF meters and detectors available to purchase. Who knew? …