[NLRS] No contest...

[Mary Brown]

I have tested a BUNCH of LED bulbs, the name brand like GE, Sylvania(best) seem to have the least amount of noise. Sylvania bulbs have zero hash on 2m or 6m... a tiny bit on HF but mostly on 160m where I don't have a real antenna. The cheap store brand bulbs are horrible!

Mary
W0AAT

-----Original Message-----
From: nlrs-bounces at mailman.qth.net [mailto:nlrs-bounces at mailman.qth.net] On Behalf Of Dave Fugleberg
Sent: Wednesday, January 19, 2022 5:49 PM
To: Bruce Richardson
Cc: NLRS Reflector
Subject: Re: [NLRS] No contest...

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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