sleepysurf Wrote: > I posted my doorbell chime extender observation solely because, IMHO, it > offers *objective* proof that *something* has changed.
Yep. To tell the truth, when I first read your post, I thought the whole situation was extremely bizarre. But after thinking about it for a while, I realized that there is physically verifiable evidence here. And physically verifiable evidence, no matter how bizarre the circumstances is to me worth more than audiophile hearsay. That's why this whole thing is worth investigating further. I did look up these remote doorbells, and it appears some work at 400 MHz or so, and some work at 2.4 GHz (which begins to make sense). So a hypothesis might be that conducted EMI at around 2.4 GHz is getting into the system and radiating (via speaker cables?) and getting picked up by the doorbell receiver. That was why I suspected there might be a cable from SB analog out to preamp. The 63 dB attenuation at audio won't attenuate 2.4 GHz by nearly that much, but maybe by a few dB. If it's a conducted EMI problem, there's really only two paths originating at the SB - the analog output cable and the S/PDIF. If it's not a conducted EMI problem, I must admit I'll be lost at that point. But disconnecting the analog cable and replacing the S/PDIF cable with TosLink (one at a time) will eliminate conducted EMI originating with the SB. One reminder, but I'm sure you already know this. Before changing anything, be sure to repeat the problem with the remote doorbell, just in case something else has happened in the meantime to change things. -- andy_c ------------------------------------------------------------------------ andy_c's Profile: http://forums.slimdevices.com/member.php?userid=3128 View this thread: http://forums.slimdevices.com/showthread.php?t=26332 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
