[Mobile-Portable] HTX-10 and speed limit light noise

Wed, 9 Apr 2003 21:55:48 -0700

California cities went almost all LED traffic signals two years ago when
electric prices went sky high.  I am sure a "Google" search on newsgroups
regarding "LED light interference" would find the references.

Dan KI6X

-----Original Message-----
From: paul goble [mailto:[email protected]]
Sent: Wednesday, April 09, 2003 9:22 PM
To: Dan Violette
Cc: 'Jeff, Julie, Annabelle, and Nicholas';
[email protected]
Subject: Re: [Mobile-Portable] HTX-10 and speed limit light noise

On a recent trip to Albuquerque, I found that transmitting on 2M with
400W SSB to a pair of KB6KQ loops, at certain (not most) intersections,
turned some LED traffic lights (both red & green, and not necessarily
all lights in the intersection) off, but I didn't have any interference
from them - the only interference was from me TO them!  Only time I've
ever run into THAT, but I don't normally run into LED traffic signals!!
2M signal reports from the local folks I was in contact with (S9+ signal
strength) at the time were clean, so it wasn't a "dirty" transmitter.

I didn't try 10m; next time in ABQ I'll check!  Haven't been
particularly bothered around Texas by anything other than straight line
noise except for occasionally hearing the relay spikes from flashing
lights signifying a school zone.

Interesting!!

73, Paul ND2X/5

Dan Violette wrote:
>
> I have seen a few messages regarding problems with the LED type lights.
If
> they are LED I think it had something to do with the power supply or the
> like controller.  Apparently some of the new red/green lights are bugging
> people with hash (yellow is not normally replaced since it is not on
much).
>
> Dan, KI6X
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Jeff, Julie,
> Annabelle, and Nicholas
> Sent: Wednesday, April 09, 2003 3:59 AM
> To: [email protected]
> Subject: [Mobile-Portable] HTX-10 and speed limit light noise
>
> Hello, all.  As I was driving around yesterday with my HTX-10, I came upon
> one of those speed limit warning signs.  It has 2 flashing yellow lights
> that activate when a vehicle comes close, over a 25 MPH sign.  The sign is
> here because the road goes from 40 to 25 very quickly.  The sign also has
> what I think are solar panels on top to keep the battery/ies
> recharged.  Anyway, as I approach the sign, the yellow lights start to
> flash, and at the same time, in sync with the alternating flashing yellow
> lights, I get loud bursts of static on the HTX-10!  It even continued for
a
> few seconds after I passed the sign.  I've never had any bursts of static
> or noise like this with any other traffic/signal/warning lights.  I
haven't
> come across any railroad crossings yet though, so I don't know if the
> alternating flashing lights there would cause the same thing.  Anyone got
> any ideas?
>
> Thanks and 73,
>
> Jeff, KF4KWO
>
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