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[Solved] Radio Interference from LEDs: Solving 230 Halogen, 12V LED Strips & KB Sound iSelect5 Issues

Kkkp1305 15618 11
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  • #1 17024535
    Kkkp1305
    Level 2  
    Posts: 4
    Rate: 1
    You can suggest how to solve the problem of radio interference. In short: in the suspended ceiling I have mounted 230 halogen leds, 12v led strips with transformer and ceiling radio (KB sound iselect5). When I start the radio by myself, it plays perfectly, turn on the halogen lights, still great, but as soon as I start the noise and noise. I guess it's a transformer issue. I will add that the ceiling is suspended from the table to drywall. You have an idea how to get rid of the problem. ? Change the tansformator? Onscreen what is it?
    Thanks for the help
    Christopher
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  • #2 17024561
    Rezystor240
    Level 42  
    Posts: 9241
    Help: 689
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    Kkkp1305 wrote:
    You have an idea how to get rid of the problem. ? Change the tansformator? Onscreen what is it?


    Shielding does not pay, outgoing and incoming cables do as an antenna.
    So the effect of shielding will be small.
    It is best to blow out the current `` transformer '' and replace it with a normal transformer.
    Halogens are normal filaments or LEDs?
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  • #3 17024649
    fzyga43
    Level 23  
    Posts: 479
    Help: 70
    Rate: 116
    Of course, it's about LED power supply. All cheap Chinese DC converters emit high intensity interference. Use good quality converters attached at zero. Shielding is not effective.
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  • #4 17024656
    Rezystor240
    Level 42  
    Posts: 9241
    Help: 689
    Rate: 1650
    fzyga43 wrote:
    Use good quality converters attached at zero


    I don't quite understand what this zero is about, please develop your thought.
  • #5 17024679
    Kkkp1305
    Level 2  
    Posts: 4
    Rate: 1
    fzyga43 wrote:
    Of course, it is about powering LEDs. All cheap Chinese constant current converters emit high intensity interference. Use good quality converters attached at zero. Shielding is not effective.


    Any example of a transormator? 20 m led, in cables of 5 m. 600 led per meter.
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  • #6 17024683
    fzyga43
    Level 23  
    Posts: 479
    Help: 70
    Rate: 116
    Switching converters in the mains voltage zero, do not generate interference.
  • #7 17024684
    elektryku5
    Level 39  
    Posts: 6299
    Help: 460
    Rate: 1053
    Kkkp1305 wrote:
    You can suggest how to solve the problem of radio interference. In short: in the suspended ceiling I have mounted 230 halogen leds, 12v led strips with transformer and ceiling radio (KB sound iselect5). When I start the radio by myself, it plays perfectly, turn on the halogen lights, still great, but as soon as I start the noise and noise. I guess it's a transformer issue. I will add that the ceiling is suspended from the table to drywall. You have an idea how to get rid of the problem. ? Change the tansformator? Onscreen what is it?
    Thanks for the help
    Christopher



    Transformer or power supply? If this is an ordinary tape, then the power supply probably also some typical 12V (in ready lamps - floodlights etc. there are also power supplies with stabilized current), in the case of an ordinary power supply it is best to simply replace it, the fight with these inventions is doomed to failure.

    Upload a photo of this "transformer" and the LEDs themselves.
  • #8 17024837
    Kkkp1305
    Level 2  
    Posts: 4
    Rate: 1
    This is how it looks
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  • #9 17025072
    Kkkp1305
    Level 2  
    Posts: 4
    Rate: 1
    Any suggestions ? What to buy ?
  • #10 17966546
    elektronikq
    Level 25  
    Posts: 3329
    Help: 70
    Rate: 614
    Does this inverter have a PE terminal?
  • #11 17988153
    Maharadzdza
    Level 9  
    Posts: 97
    Help: 4
    Rate: 20
    try to change the place for the power supplies (extend the cables and push them furthest from the radio and the antenna). Using the test method, check what disturbs the radio operation, whether the tape power supplies or halogen power supplies. Turn on one separately and check the radio and then the other and check the radio, then you will know which are interfering. Organize all cables, e.g. with a broomstick or make technical holes or get through the holes for the lamps.
  • #12 17988301
    diantus
    Level 32  
    Posts: 1446
    Help: 203
    Rate: 276
    fzyga43 wrote:
    Use good quality converters included in the kit
    fzyga43 wrote:
    Switching converters in the mains voltage zero

    You write nonsense here. The converters are supplied with DC voltage from the rectifier bridge and operate at a frequency of several kHz. There is no switching at zero here, moreover, it would not have any effect on the operation of the converter in the LED power supply.
    You confuse the concept of power supply with group power control.
    The source of interference are these converters - there are no suitable LC filters at the output.
    They should not emit radio interference, the cheapest Chinese LED with transformerless power (without inverter).
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Topic summary

✨ The discussion revolves around resolving radio interference issues caused by 230V halogen lights and 12V LED strips connected to a KB Sound iSelect5 radio. Users suggest that the interference is likely due to the low-quality LED power supply, particularly cheap Chinese DC converters, which emit high levels of electromagnetic interference. Recommendations include replacing the existing transformer with a better quality power supply, ensuring proper shielding is ineffective, and relocating power supplies away from the radio. Users also discuss the importance of testing each component separately to identify the source of interference and the need for suitable LC filters in the power supplies to mitigate radio noise.
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FAQ

TL;DR: LED switch‑mode supplies run at several kHz; "The source of interference are these converters." Replace poor drivers, separate them from radios, and avoid shielding. This FAQ helps ceiling‑radio users and installers fix LED‑related crackle quickly. [Elektroda, diantus, post #17988301]

Why it matters: It preserves clear reception and audio on in‑ceiling units like KB Sound iSelect5.

Quick Facts

What’s causing the radio interference when my LEDs are on?

Switch‑mode LED converters switch at several kHz and spray broadband noise. The noise couples into nearby radios through wiring. Cheap units often lack adequate LC output filtering. "The source of interference are these converters." Replace noisy supplies with better filtered models. [Elektroda, diantus, post #17988301]

Will shielding cables or the PSU stop the crackling?

Not effectively. "Shielding does not pay." The outgoing and incoming cables behave like antennas. They radiate and receive interference. Shielding the box leaves the cables unaddressed. Replace or relocate the supply instead. [Elektroda, Rezystor240, post #17024561]

Should I replace my “electronic transformer” for the LED strips?

Yes. Swap out the current electronic "transformer" for a normal transformer or quality LED supply. "The fight with these inventions is doomed to failure." A proper replacement cures the source, not the symptom. [Elektroda, elektryku5, post #17024684]

How do I pinpoint which device is causing the interference?

Use a simple A/B test.
  1. Power the radio and turn off all lighting supplies.
  2. Turn on only the LED strip supply; listen for noise.
  3. Turn that off, then turn on the halogen/other supply; compare.
This isolates the culprit. [Elektroda, Maharadzdza, post #17988153]

My KB Sound iSelect5 crackles when LEDs turn on—what’s the quickest fix?

Increase separation. Extend low‑voltage leads and move LED power supplies far from the radio and its antenna. Neatly route and secure the cabling. Test each supply individually to find the worst offender. Replace that unit with a filtered model. [Elektroda, Maharadzdza, post #17988153]

Does zero‑cross or “attached at zero” help with LED noise?

No. LED supplies rectify AC then run a high‑frequency converter. "You confuse the concept of power supply with group power control." Zero‑cross control does not stop the converter’s switching noise. Focus on filtering and placement instead. [Elektroda, diantus, post #17988301]

What should I look for in a replacement LED power supply?

Choose a quality switch‑mode supply with proper EMC filtering. Units without adequate LC output filters radiate noise. Prefer models advertised for low interference. Replace electronic "transformers" with these filtered supplies. Keep leads short near the supply and away from antennas. [Elektroda, diantus, post #17988301]

Do any LEDs avoid interference altogether?

Yes. Transformerless LED designs that omit an inverter should not emit radio interference. This is an edge case and depends on the product. Most strips use switch‑mode supplies, not transformerless circuits. Confirm the design before relying on this. [Elektroda, diantus, post #17988301]

Does moving the power supplies away from the radio really help?

Yes. Extend the cables and push supplies as far from the radio and antenna as practical. Organize and secure all cabling. Test one supply at a time and compare reception. Keep the worst offender farthest from the radio. [Elektroda, Maharadzdza, post #17988153]

Do long cable runs make interference worse?

Often, yes. The outgoing and incoming cables act like antennas. They couple switching noise into the air and the radio front end. Shorten exposed leads near the supply when possible. Prioritize clean routing over ad‑hoc shielding. [Elektroda, Rezystor240, post #17024561]

What type of supply should a typical 12 V LED strip use?

Use a typical 12 V constant‑voltage supply for ordinary LED strips. Many finished lamps use constant‑current drivers instead. Mismatching type causes issues or interference. Replace inadequate supplies rather than trying to fix them piecemeal. [Elektroda, elektryku5, post #17024684]

What should I share to get better troubleshooting help?

Provide clear photos of the "transformer" or power supply and of the LEDs. Show labels, terminals, and wiring. Include distances, cable lengths, and where the radio and antenna sit. This enables precise advice and replacements. [Elektroda, elektryku5, post #17024684]
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