[time-nuts] the end of light bulbs as we know it was Re: Safe power-up. was (Solartron 7075 ...)

David VanHorn D.VanHorn at elec-solutions.com
Wed Oct 12 10:03:20 EDT 2011

A friend of mine runs a compliance lab locally, many LED products in the flow these days.
He has tested some "random" samples purchased at walmart and such, and his comment was "No way in HELL would these pass".

Might be time for some consumer action.

From: time-nuts-bounces at febo.com [time-nuts-bounces at febo.com] On Behalf Of Hal Murray [hmurray at megapathdsl.net]
Sent: Tuesday, October 11, 2011 11:37 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] the end of light bulbs as we know it was Re: Safe power-up. was (Solartron 7075 ...)

> Now to the negative part , noise floor from around 21MHz to well over 500MHz
> raised to a signal strength 5 to 6 across mid to upper HF / lower VHF to
> upper UHF with them switched on, otherwise my noise floor is Zero.

> Lower VHF  to UHF SSB/FM low level signal work is now not possible when LEDs
> are on, mostly at night when we enjoy the hobby.

What is causing that trash/EMI?  Switching power supplies?  PWM?

How much gets up to 1.4 GHz?  (GPS)

These are my opinions, not necessarily my employer's.  I hate spam.

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