Music in background of feed

N5JMC · Nov 20, 2015

I had a lot of hum in the background of my feed so I ordered a different usb sound card, the one in the wiki article to see if that would help. swapped it out and for some reason I'm able to hear what sounds like some type of mexican radio station in the background but at a low volume. Have you ever heard of this? Any idea what could be causing this? This is the soundcard I switched to: http://amzn.com/B000N35A0Y

I just turned off my scanner but left the audio cable hooked up to my scanner and usb sound card, and the music is still there? If I unplug the audio cable from the scanner with it off, the music goes away, then plug the audio cable back into the scanner with scanner still off and the music is back.

Do you want to listen to my feed to see if you hear it? Sherwood Police and Fire

I also tried a shielded audio cable from radio shack and the music is still there?

ka8zay · Nov 20, 2015

Sounds like you have a radio station close by that is overloading your equipment.

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N5JMC · Nov 20, 2015

I unplugged the power cord and it stopped. So something with the ac power cord and audio cables or what? I ran it on batteries for a little and no music. I am confused.

ka8zay · Nov 20, 2015

You are probably getting rf through the power cable. Try wrapping it around an RF choke.

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N5JMC · Nov 20, 2015

are you talking about something like this? Would I wrap my power cord around that a few times in between wall outlet and scanner?

https://www.radioshack.com/products/radioshack-100-h-rf-choke?variant=5717358789

ecps92 · Nov 20, 2015

Match the music to your AM or FM dial, as KA8ZAY indicates, likely RF getting into your power

ka8zay said:
Sounds like you have a radio station close by that is overloading your equipment.

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N5JMC · Nov 20, 2015

ka8zay said:
You are probably getting rf through the power cable. Try wrapping it around an RF choke.

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Local Radio Shack only has these 2 in stock. Would these work? If so which one would you recommend?

https://www.radioshack.com/collecti...radioshack-snap-choke-core?variant=5717355973

https://www.radioshack.com/collecti...ogether-ferrite-choke-core?variant=5717359621

ka8zay · Nov 20, 2015

I would try the first one.

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N5JMC · Nov 20, 2015

Thank you! I'll get it later today and let you know.

wtp · Nov 20, 2015

try

1350 A.M.
listed as a spanish station.

N5JMC · Nov 20, 2015

I thought the same looking at a list I found online, but I matched it on a little alarm radio with a dial but didn't give me the readout of station, so matched it in truck and it's 1380 which I can't find much info on. I found that there was a 1380 in sherwood ar where I live but it was contemporary.

N5JMC · Nov 20, 2015

Bought these and it didn't help at all. even put both on power cord and didn't help. took 1 off and put 1 on my 3.5 mm audio cord and left 1 on power cord and no change. Any other ideas?

https://www.radioshack.com/products/radioshack-snap-choke-core-1?variant=5717356421

ka8zay · Nov 20, 2015

It must be getting right into your scanner. Not much else I can think of other then putting everything in a metal grounded box except the antenna.

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N5JMC · Nov 20, 2015

The soundcard I was using before didn't do this, so I swapped it back out and it's gone now. Not sure why it's only with the new soundcard I ordered.

ka8zay · Nov 20, 2015

Okay well that is just weird since you said it went away when you unplugged the cable from the scanner. That made me believe it was coming from the scanner not the sound card.

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N5JMC · Nov 20, 2015

I know it's weird how the sound card played into it. And when on power I had music but when on batteries it didn't.

ka8zay · Nov 20, 2015

Must have created some weird induction loop, a perfect storm then. Did you try the choke on the audio cable as well?

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N5JMC · Nov 20, 2015

Yes. One on power cable and one on audio cable.

Do you think more power is pushed through audio cable when I have scanner plugged in wall vs batteries?

But that still doesn't explain the other usb sound card.

ka8zay · Nov 20, 2015

Yea that's just weird. Chalk that one up to strange events.

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N5JMC · Nov 20, 2015

I am but still curious about why it's broadcasting, especially Spanish music after looking at this site. I assume this pulls from FCC? I tried calling the number but fast busy tones. Think I'll make a trip to the address listed in Kiehl and see if they know what's broadcasting. It's right down the road from me.

http://radio-locator.com/info/KDXE-AM

Music in background of feed

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