Hi Julian. This is why I stuck to the digital side of EE in college. RF is just damn black magic :)
Yes. Disconnecting everything and it's gone. Reconnecting just the center channel, and there's no sound. But as soon as I add the L and R fronts, it's back, very faint. Adding in the side surrounds makes it stronger, and then rears stronger yet. Seems without the side surrounds its very faint. Still there, but tolerable. Here's what I don't get. I made my front channels (L,R,C) all the same length, but they're not the same length as the surround sides, which themselves are a different length from the rears. So what are the odds that I made them all some resonance of 199.9 meters? Ideas for solutions? There's gotta be a way to filter this out? And yes, we've lived in the DC area since 2011. Moved to just north of Silver Spring about 18 months ago. Wife and I both work in DC. --------- Brian On Sat, Jan 6, 2018 at 11:42 AM, Julian Zottl <jzo...@radiantnetworks.net> wrote: > Hey Brian, > I take it the sound isn’t there when the speakers are not plugged in to > the receiver? > > There could be lots of reasons for it unfortunately. I would try (I know > it’s annoying) everything, then just plug in the F center speaker and turn > the receiver on with nothing else connected. If you hear something, then it > could be the receiver has an issue. Try plugging in one source and see if > there is sound. Then I’d add the speakers one by one and see if the sound > comes back. After that, I’d start adding in the sources. > > Hopefully that helps you track down the source of the issue. I know it > sounds crazy, but you might be hitting a harmonic on one of your cables. > 1500AM = 199.9 meter wavelength. If one of your cables is multiplier of > that, you could literally have set yourself up a nice antenna for that > station, which would feed back in to your receiver. > > Where in DC are you? I’m out in Ashburn :) > > Take care, > Julian > > Sent from my iProduct, cause I'm iSpecial.... But not in that iShort Bus > kind of way... > > > On Jan 6, 2018, at 10:45 AM, Brian Weeden <brian.wee...@gmail.com> > wrote: > > > > I know this isn't a computer question, but figured there might be some on > > the list who have some expertise that can help me figure out this pesky > > question. > > > > Two years ago we remodeled our basement, and I ran speaker cables for a > 7.1 > > setup. I used good quality 14AWG CL2 cable, and HDMI for the video. > > Everything goes back to a Yamaha A/V receiver. > > > > Almost immediately I noticed that there was faint sounds coming from the > > speakers unrelated to what was playing. It's gotten worse over time, to > the > > point where now it is clearly identifiable as WFED AM 1500 radio station, > > about 10 miles away. It's loud and clear to the point where the radio is > > just as loud as the source audio with volume set to -40 dB, and if the > > volume is set lower than that the radio is louder. The radio comes > through > > no matter what I seem to do. Muting the A/V receiver, switching inputs, > > it's still there. > > > > Clearly there's some sort of interference going on, but I can't seem to > > identify the source. It comes through all the speakers at about equal > > level, suggesting it's being broadcast and amplified from the receiver > and > > not just randomly being picked up by the wires. The wires are not > > extraordinarily long - about 20 ft for the rear surrounds. I actually had > > the same receiver in a previous house that was much closer to the radio > > station, but didn't have any problems. All the inputs to the receiver are > > HDMI (Fios TV box, HTPC, WiiU), so it's hard to see how they could be > > picking up interference. > > > > Thoughts? Suggestions? > > > > --------- > > Brian >
