Batboard

Has anyone had issues with their mobile radios after installing LED lighting? I have rear 3 head LED lights and a directional LED light bar in the rear window of a pickup. When I turn on either of the LED lights or the directional bar I cant hear our dispatch or they are so scratchy I cant understand them?

Need alot more info than this.

What kind of radio, band, frequencies, antenna location, mount, power...

Yep. It's the switching power supplies for the LEDS throwing off cacapoopoo. You could try doing a better job with the wiring, grounding, filtering the power, etc AFTER (emphasis on AFTER) you have determined the noise is not being radiated. They can do it both ways - trash the power line, and trash the air. You have to do some careful troubleshooting, and you may have to get rid of the lights.

KB2ZTX wrote:Need alot more info than this.

What kind of radio, band, frequencies, antenna location, mount, power...

AND what kind/brand/model "LED's" and their power supply.

Good power wiring practices are learned in Alternator Whine 102, AND BSP.

We have found Federal Signal LED's to produce near zero interference.

Whelen are considerably worse. Tomar are terrible. Knockoffs are generally poor.

I had a self-contained visor LED amber/wht pair, cheapie off Amazon, that was quite noisy on VHF.
No control box, just a button on the back to step through on/off & flash type.

I wrapped the housing in self-adhesive aluminum tape used for sealing HVAC ducting, and it cut the noise to a tolerable level. I was surprised at the effective impact, since the front facing light output remained uncovered, but without knowing how the circuit board was situated inside the housing I must have lucked out.

The thing crapped out soon after and was discarded, but the noise suppression technique might be helpful to others.