Vland T6 LED Projector Headlights
- Thread starter Jimmy123
- Start date
I agree about the light and quality,mine started out as minior interference on the dab, but after a week it started to effect the fm, I contacted the seller and they offered some money off or a refund as they said they don’t have a solution, so I am sending them back after trying the beads as they had no effect,and I can’t live with out radio
Yes, I've lost all DAB radio.
The DAB signal isn't strong on the south coast, but I've now lost it all. I'm going to try a ferrite core or add a DAB antenna in the rear.
Headlights look great and are really bright. As a headlight only, they are brilliant.
The DAB signal isn't strong on the south coast, but I've now lost it all. I'm going to try a ferrite core or add a DAB antenna in the rear.
Headlights look great and are really bright. As a headlight only, they are brilliant.
Sounds like a case of do you want to see what's in front of you or listen to Kisstory as you drive into a dark oblivion?
In my case I've still got H4s and spotty DAB coverage so the best of both worlds.
Having just come back from a few days in Lymington I can confirm O2 coverage isn't brilliant either.
In my case I've still got H4s and spotty DAB coverage so the best of both worlds.
Having just come back from a few days in Lymington I can confirm O2 coverage isn't brilliant either.
My DAB has taken a bit of a hit also.
In regards to the ferrite cores, is it a case of fitting these on all the wires as they leave the headlight assembly?
I would think around the DAB antenna coax to the head unit as you're trying to choke off the RF being produced by the LED drivers and that's going in all directions.
I put them round the wiring into the headlights as everything I found on line said to put them as close to the source as possable
That’s what I do, my phone reception is shit too round here so doesn’t always make it that much better
My dab isn’t too bad when the dipped beam is on so there’s ways round it I guess
Adding a ferrite around the DAB coax cable into the head unit won't do anything. It would probably make it worse.
The ferrites can be added in 2 ways, depending in if the EMC interference is between cables, or along way (simple explanation). Adding a ferrite over the bundle of wires to the headlight is one way and reduces radiation along the cable. But if the interference is between cables, you need to add the ferrite to just the power line. Sometimes looping it twice helps.
I've order some 9mm ferrites to try. Unfortunately Bognor Motors has my van to fix an oil leak, but hopefully I get it back soon.
The ferrites can be added in 2 ways, depending in if the EMC interference is between cables, or along way (simple explanation). Adding a ferrite over the bundle of wires to the headlight is one way and reduces radiation along the cable. But if the interference is between cables, you need to add the ferrite to just the power line. Sometimes looping it twice helps.
I've order some 9mm ferrites to try. Unfortunately Bognor Motors has my van to fix an oil leak, but hopefully I get it back soon.
I wasn't too sure about the size too get so I opted for the 13mm based on some comments on another thread. I'm not expecting miracles TBH. Might visit a local ICE installer and ask for suggestions.
Really you need to know what frequency RF you're trying to choke off to reduce the spurious radiation that's swamping the DAB signal frequency.
UK DAB uses frequencies around 225 MHz so ideally you would want a ferrite that would effectively act as a bandpass filter and provide a much higher choking impedance on the radio coax either side of 225 MHz although there would still be interference RF that happens to also be on 225 MHz just hopefully at a lesser amplitude than the desired DAB broadcast signal.
I joked earlier about a roll of tin foil but that's pretty much what RF screening is in say a laptop case, sometimes it's just a layer of conducting spray paint but either way it's a rudimentary Faraday cage to try and contain spurious RF shizzle.
How To Remove Radio Interference Using Ferrite Coils For Hid And Led Headlights - better automotive lighting
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gavinstours
Member
I have emailed VLand and they have asked for a video of the issue, what I have just noticed is that with the lights on, there isn’t much of an issue, it’s when the lights are off that it really struggles.
Anyone have any suggestions as to what might cause this?
I will leave the lights on for now and see what happens.
Anyone have any suggestions as to what might cause this?
I will leave the lights on for now and see what happens.
Any pictures of the VLand headlights prior to installation just to see if there's a separate led driver like you get with some led halogen lamp replacement lamps.
Just wondering if they have an external constant current/constant voltage driver to maintain lighting level output as the led chip temperature rises and resistance alters, this is guessing that such a driver is a switch mode PSU like a B2B charger?
Just wondering if they have an external constant current/constant voltage driver to maintain lighting level output as the led chip temperature rises and resistance alters, this is guessing that such a driver is a switch mode PSU like a B2B charger?
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