Browse Forums Lighting + Lighting Design Re: Help! 12v LED downlight globes = TV interference 9Mar 29, 2010 8:38 pm Hi all I have the exact same problem. I just invested in $600 of LEDs bulbs (MR16 9W 3x3w) LED and drivers and apart from the flickering, its the reception interference that is most annoying. I have tried all sorts of combinations with the drivers but to no avail. I bought my bulbs from a Queensland distributer. Re: Help! 12v LED downlight globes = TV interference 10Mar 29, 2010 9:12 pm Masada, do you know what certifications the globes have? I've googled the certifications my globes have... CE = http://en.wikipedia.org/wiki/CE_mark RoHS (Restrictions of Hazardous Substances) = http://www.rohsguide.com/rohs-faq.htm I am not surprised about the possible confusion between "CE" and "China Export" using almost the same logo, as mentioned in the wiki page... The CE logo on the packaging with my globes is in fact the correct one, and not the "China Export" copy Re: Help! 12v LED downlight globes = TV interference 12Mar 29, 2010 9:39 pm borg what could be making things worse is that you have a near by amplifier. This will make noise a even greater issue. I assume you're referring to the TV-antenna amplifier and not the stereo amplifier... The only way I could move the Tv-antenna amplifier further away would be to enclose it in a weatherproof case and mount it on the wall at the back of the house. Not exactly practical, but doable. I wonder if it's the antenna cabling that is picking up the interference and not the amplifier itself. The cabling is clipped to the beams under the timber floor. It is fairly new cabling (I put it in a few years ago). I wonder if it's worth trying to shield the amplifier by placing a sheet of metal between it and the timber beam it's mounted on (to possibly reflect any interference back up, away from the amplifier)? Doing the same for the anetanna cabling would take a long time. I could also re-route the cabling around the house so it's away from the lounge-room floor. Re: Help! 12v LED downlight globes = TV interference 13Mar 30, 2010 8:22 am The coax cable should have some level of protection. It may also be the connectors. Are there any corroded connectors?? Are they installed correctly. Are there any or where there any kinks in the cable. Can you adjust the gain of the amplifier? if so reduce rather than increase it. If not then add a splitter on input of the amplifer to reduce the power by 3dB approx half. Trouble is with amplifers is that they amplifiy good signal as well as bad. Re: Help! 12v LED downlight globes = TV interference 14Mar 30, 2010 4:10 pm The connectors should be fine as I only installed them about 6-9 months ago, but will check. Cabling is all OK too. I can adjust the amplifier gain so will give it a try. It might be up too high to compensate for the number of outlets I have. Re: Help! 12v LED downlight globes = TV interference 17Mar 31, 2010 6:28 pm Progress this afternoon after finding a torroidal transformer in the garage (salvaged from an old Crompton surface-mount halogen fitting) and picking up four GU10 globe-holders from the wholesaler... The torroidal transformer made no difference; the interference is still present with only two 12v LED globes connected to it. The four GU10 globes however, was a success. I still have to try winding down the gain on the TV amplifier which I hope to try tomorrow, but I don't think it'll make any difference, as the interfering signal is probably already stronger than the TV-station broadcast signal and I suspect both signals will go up and down proportionally with adjustment of the amplifier gain. No response from the eBay seller since I emailed him with the link to the PDF document above... Re: Help! 12v LED downlight globes = TV interference 18Mar 31, 2010 6:34 pm ended up a jaycar today to get the ferrite chokes and whilst buying them the sales assistant was very sincere in suggesting that I was barking up the wrong tree and what I should be doing is just earthing the antenna as he says this is a common issue with digital TVs and the solution is earthing so will try that because the ferrite chokes didn't help Re: Help! 12v LED downlight globes = TV interference 19Mar 31, 2010 7:37 pm This is some great info guys! Re: Help! 12v LED downlight globes = TV interference 20Mar 31, 2010 8:36 pm I would be interested to see the response from reducing the gain. There is a small possibily that the amplifier is going into current limiting if it is picking up to much signal meaning that all the signal in the band is not being amplified correctly. This is a stab int he dark as you should always get rid of the source first. Thankyou so much 😀 I've decided on White on white for doors and trims, White on white 50% on ceiling and Mt buller for walls. Fingers crossed it will look OK 😀 2 7608 brokers will also be in a position to get you a better rate than the advertised rate most times. 6 7860 |