[RFI] LED Replacement for T8 40 W Flourescent

[dalej]

So the ballasts do not have power going to them? Or do they? Still are powered?

Anyway, glad to hear of no noise from the LED’s.  

I just seen this morning early, on the way to the gym they have installed LED street lights in my neighborhood.  Seem to be a bit dimmer than the old lights, but so far I don’t note any extra noise.

73
Dale, K9VUJ


On 20, Nov 2016, at 16:11, Kim Elmore <cw_de_n5op at sbcglobal.net> wrote:

The magnetic ballast on a fluorescent fixture began to show signs of trouble. So, I replaced the two T12 40 W fluorescent tubes with Luceco LED linear tubes that are "bypass" units. This means that they receive direct house current and do not receive power though the ballast. Each is rated at 22 W instead of 40 W, and ae rated at 2400 lumens. The power supply (certainly a switching power supply) is integrated into one end of the tube. I'm happy to report that I can't hear any evidence of them on any of my antennas.

I have also replaced T8 32 W tubes that are drop-in replacements (no wiring around the ballast required). These are Phillips brand purchased at Home Depot.  These are also radio quiet at my stations.

I have a shunt-fed tower for 160 m about 60 ft from these tubes, an inverted V for 75 m with the apex at about 40 ft, and HF antennas for 40-10 m at about 50-60 ft. I have a  All HF bands are quiet and I cannot detect any change when the lights are operating. I also cannot hear it on my 80 m OCF vertical (a Force 12 Sigma 80) that is about 150 ft away.

Kim N5OP

-- 

Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)

/"In theory there is no difference between theory and practice. But, in practice, there is." //– Attributed to many people; it’s so true that it doesn’t matter who said it./

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