Happy Hopping Posted November 15, 2004 Report Share Posted November 15, 2004 I gave my Cordless infrared red headphone to my dad. His house is near a radio station who boardcast radio signals. Playing this unit on the main floor works fine. But playing this unit in his bedroom upstairs doesn't work. It receives a lot of interference, at least 3 different radio station signals are jamming into the head set. But the "supposed" output from the CD player is not coming out at all due to those radio freq. interference. We even try to use Insulation R10 (pink wall) to block some parts of the windows. Any suggestion to fix this? Quote Link to comment Share on other sites More sharing options...
Bananatree Posted November 16, 2004 Report Share Posted November 16, 2004 Infrared wireless doesn't work through walls. Infrared works the same as a TV remote, and won't work unless you point the headphones at the transmitter. Quote Link to comment Share on other sites More sharing options...
jadeclaw Posted November 16, 2004 Report Share Posted November 16, 2004 I gave my Cordless infrared red headphone to my dad. His house is near a radio station who boardcast radio signals.You already know, that base and headphone must be in the same room to work. If you still hear only the radiostations, when standing directly in front of the transmitter, then filtering the cables could work: These Clip-On filters should be available at Radio Shack. Quote Link to comment Share on other sites More sharing options...
Happy Hopping Posted November 16, 2004 Author Report Share Posted November 16, 2004 Infrared wireless doesn't work through walls. Infrared works the same as a TV remote, and won't work unless you point the headphones at the transmitter.Okay, I re-read my mesg., it wasn't very clear. When both tests were conducted, on ea. test, the base unit and the headphone are in the same room, and in the direct line of sight from the headphone to the main unit. What I was trying to say is, I was trying to eliminate the possibilities that the headphone is defective. So basicially: Test 1) Base unit and headphone upstairs--doesn't work, receiving radio signal interference Test 2) Base unit and headphone downstairs--works very nicely, absolutely no radio signal interference =============== Jadeclaw: I can try that radio shack trick, and see what happens, the original boss unit kit doesn't c/w those filter, I can put one on to the main unit and go from there. Thanks for the tip. Quote Link to comment Share on other sites More sharing options...
Happy Hopping Posted November 26, 2004 Author Report Share Posted November 26, 2004 Okay, I have tried out the above, put the ferrite choke on either end of the input to the per-amp. It does reduce a bit of those noise, but the noise is still there. i.e, RFI still exists to the pt. that it is still annoying. Any one else has some other ideas to add to the above? Something else better than ferrite choke? Quote Link to comment Share on other sites More sharing options...
jadeclaw Posted November 27, 2004 Report Share Posted November 27, 2004 Time to narrow it down: Disconnect the audiocable from the base station, if the cable cannot be removed from the base, disconnect it from the stereo and wind it into a small roll. If the interference is gone, another clip-on can help. Or alternatively, use a ferrite bar and wind the audio cable 5 to 8 times around it. If not, a wire-mesh cage around the base station can help. Connect the cage to the ground of the audio input of the base. Another possibility: The interference is not in the base, but it is in the headphone itself. Btw, setting the base to the floor could help as well. Lying down too. What helps, gives a clue, where the problem really is located. Getting rid of RF interference can be a tedious task... Quote Link to comment Share on other sites More sharing options...
Happy Hopping Posted November 29, 2004 Author Report Share Posted November 29, 2004 Time to narrow it down: Disconnect the audiocable from the base station, if the cable cannot be removed from the base, disconnect it from the stereo and wind it into a small roll. If the interference is gone, another clip-on can help. Or alternatively, use a ferrite bar and wind the audio cable 5 to 8 times around it. If not, a wire-mesh cage around the base station can help. Connect the cage to the ground of the audio input of the base. Another possibility: The interference is not in the base, but it is in the headphone itself. Btw, setting the base to the floor could help as well. Lying down too. What helps, gives a clue, where the problem really is located. well, I give up. I have already tried to put that box sitting at the floor, and let the cordless headphone sits at the carpet as well. Still got noise. The cable can't be disconnected, but I did pull it off the pre-amp and try the above, same thing, just noise. the last chance is to try the wire cage idea. If I can find one lying around, I'll do it. it is possible the headphone is picking up those noise, but I don't think so. When I try the whole kit downstair, connected the same setup to a cheap kenwood CD player, the cordless box connected to the cd player, and walked 5 ft. away from the box, the headphone works fine. Now, when it works, there is a on-going blinking red light on the main box, showing it is sending the signal correctly. But when I take the whole kit upstair, connected to the DVD/CD player upstair, or the pre-amp upstair, that light in the main box didn't blink. So it knows it is not sending the signal to the headphone. So the box is picking up too much noise from RFI near the radio station a few km from here. Regardless, I appreciate your help in this matter. Quote Link to comment Share on other sites More sharing options...
jadeclaw Posted November 30, 2004 Report Share Posted November 30, 2004 The I say, sell it off on ebay and get a diferent one. And of course, when buying a new one, make sure, that you can return it, if it doesn't work. Quote Link to comment Share on other sites More sharing options...
Happy Hopping Posted December 4, 2004 Author Report Share Posted December 4, 2004 thx. I got this free anyway. So biggie. I got it via using visa card, accumulate pt. gives me this free gift anyway. Quote Link to comment Share on other sites More sharing options...
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