[RFI] LED lighting fixtures -

[Gary]

Don,

                I will be the first to admit I may have gotten lucky with my LED tube purchase. I have not done an intensive study, but the little AM radio parked under the tubes works fine, and I did not notice anything on HF, but my antenna is outdoors. The ones I am using are called Werker and they sell for $6.99 each.

                I would recommend doing a couple and testing before I replaced a whole bunch.

73,
Joe kk0sd



From: Don Kirk <wd8dsb at gmail.com>
Sent: Monday, May 24, 2021 9:37 AM
To: Gary <gary_mayfield at hotmail.com>
Cc: rfi <rfi at contesting.com>
Subject: Re: [RFI] LED lighting fixtures -

Hi Gary,

My following comments don't answer Hank's question, but they are related to your topic of LED tube lights.

I replaced my magnetic ballast driven tubes that hang over my electronics workbench in the basement with LED tubes that operate directly off of 120 Vac, and now I pick up all kinds of trash on my oscilloscope display when making low level signal measurements on my testbench, and I now often work in the dark (:

I also hear the RFI from these tubes when testing antennas (testing small DF loops, etc.) inside the house in a room on our second floor above the basement and on the opposite side of the house and I'm at least 40 feet away from the LED tube lights, and some of the RFI is likely conducted through the house wiring.

Can't find a manufacturer's name on my LED tube lights, but the model number is WENT84SUA-18WB-50CF, and I still see them being sold online.

Just FYI, and YMMV.
Don (wd8dsb)

On Mon, May 24, 2021 at 9:48 AM Gary <gary_mayfield at hotmail.com<mailto:gary_mayfield at hotmail.com>> wrote:
Hank,

        I have had nary a problem replacing mine with L.E.D. tubes that work from 120 Volts. I have been using tubes from 'batteries plus bulbs'. You do have to remove/bypass the ballast.

        I have no interest in the company other than being a customer, and your mileage may vary.

73,
Joe kk0sd

-----Original Message-----
From: RFI <rfi-bounces+gary_mayfield=hotmail.com at contesting.com<mailto:hotmail.com at contesting.com>> On Behalf Of HP
Sent: Monday, May 24, 2021 1:40 AM
To: rfi <rfi at contesting.com<mailto:rfi at contesting.com>>
Subject: [RFI] LED lighting fixtures -

I have 4 two tube 50+ year old T12-30 36 inch fixtures that have the old magnetic ballasts - one has a failed ballast and looking for magnetic replacement ballasts looks like they are close to non- obtainium. There are plenty of "electronic" replacement ballasts -

Philips Advance Ballast RELB-2S40-N
3.6 Ballast shall comply with the requirements of the Federa l Communications Commission (FCC) rules and regulations, Title 47 CFR part 18, Consumer (Class B) for EMI/RFI (conducted and radiated)
2.5 Ballast shall be high frequency electronic type and op erate lamps at a frequency above 42 kHz to avoid interference w ith infrared devices and eliminate visible flicker.

I read the paper by W1MG on Home Depot selling "industrial " ballasts vs "residential" but nowhere does it say a "residential" ballast is in fact RF quiet in our uses.

Anyone know if if this Phillips RELB-2S40N is quiet . Are there any brands/part numbers of "electronic" ballasts known to be RF quiet ?


Hank K7HP


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