[Elecraft] Weird Ticking QRM

Steve Reed ai7az at arrl.net
Tue May 15 10:42:35 EDT 2012


Question:  what item in my household emits so much broadband QRM that my K3
is completely useless on 80 meters?

Answer:  the Toyota Prius in my garage.  Turned "off" and not moving!
Seriously!

:-)

73,

Steve, AI7AZ


On Tue, May 15, 2012 at 7:27 AM, Bob K6UJ <k6uj at pacbell.net> wrote:

> Jim,
>
> I discovered the same thing from my Makita battery drill charger in the
> garage.   As you, I was very happy to discover this
> annoying noise maker.
>
> Bob
> K6UJ
>
>
>
> On May 15, 2012, at 7:07 AM, Jim Sheldon wrote:
>
> > Shortly after loading the latest version (4.51) I was occasionally
> getting a continuous tick-tick-tick signal on the higher bands that was
> very annoying.  It also showed on the P3 as a very low amplitude,
> approximately 2 per second swept line (on the waterfall).   It disappeared
> with the antenna disconnected.  Thinking it was my new laptop, I shut that
> off to no avail.  This had been going on for several days now, and I was
> almost ready to tear what's left of my hair out.  The power company had
> installed one of those new "smart" radio controlled meters on a neighbor's
> house (I refuse to let them change mine out) and I suspected that too, but
> this morning I FINALLY found it!  Turns out that 4.51 firmware was not the
> problem at all!
> >
> > I have a Black & Decker 18 volt battery drill that I use almost every
> day for some sort of project and I have been working on installing a new
> Yaesu 7900 2/440 rig in the wife's car.  I had the spare battery sitting on
> the rapid charger and it appears the charger is one of those "pulse" types.
>  Just a few minutes ago, it all of a sudden dawned on me to remove the
> battery from the charge slot and instantly the ticking noise disappeared!
> >
> > Just goes to show you that sometimes it's the simplest things that
> create the most complex problems - ;)  Boy, I won't ever forget THAT noise
> source!
> >
> > Jim - W0EB
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