[time-nuts] the end of light bulbs as we know it was Re: Safe power-up. was (Solartron 7075 ...)
hmurray at megapathdsl.net
Wed Oct 12 05:37:38 UTC 2011
> 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)
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