[NLRS] No contest...

[Dave Fugleberg]

There appears to be a lot of variation in the LED bulbs available for home
use as well. Last summer I started playing with linear satellites, and put
beams for 2m and 432 on a short mast in the backyard about even with the
roofline of the garage. Terrible racket on 2m, especially when pointed at
the garage.

I noticed that the noise dropped steeply when I turned off the lights in
the garage - six LED bulbs. So I turned up the receiver and started
unscrewing bulbs one by one, noting that the racket decreased as I went.
The only one that made NO perceptible difference was one of those super
bright three-panel LED bulbs I had recently bought at Costco.
I had expected that one to be the worst offender, but it turned out to be
the best by far.

The noisy bulbs don’t seem to be a problem on 6m and HF, but that might
also be partly due to the antennas being higher and further away.

One other observation- some time back, I replaced the light in my garage
door opener with a LED, and quickly found that I could not close the door
with the remote from the car. Apparently too much noise too close to the
door opener’s receiver. I replaced it with an incandescent and the problem
was resolved. Sometimes old school is the best.
73 de W0ZF

On Wed, Jan 19, 2022 at 12:53 PM Bruce Richardson <w9fz at w9fz.com> wrote:

> Speaking of LEDs and noise.  I noticed something a number of years ago
> while out in my rover while at stop-lights.
> I'd be sitting there monitoring 2m SSB.  When I pulled up to the
> stop-lights, the noise level would go up a bunch.  And the noise would
> change as the stop-light flipped from Green to Yellow to Red.  I had  a
> crunch-craft beam pointing right at the stop light.  It certainly raised
> noise from over 100 yards out.
>
> With the exponential rise in the use of LEDs it would not surprise me that
> the diodes and their power supplies are really adding a lot of noise to the
> VHF.
>
> 73
> Bruce Richardson W9FZ/R
>
>
> -----Original Message-----
> From: nlrs-bounces at mailman.qth.net <nlrs-bounces at mailman.qth.net> On
> Behalf Of Ray Gustafson via NLRS
> Sent: Wednesday, January 19, 2022 9:35 AM
> To: Mary Brown <maryalanab at gmail.com>; 'NRLS Reflector' <
> nlrs at mailman.qth.net>
> Subject: Re: [NLRS] No contest...
>
> Mary Does the street light cause noise during the day even when light is
> off?Maybe in standby mode ? I have noise 24 7.I have a lot more noise too
> for a while now , I notice the city is putting in LED
>
> <snip>
>
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