Solved Radio Playing at Startup

[Phredtx]

Sometimes when I start up my computer I here AM talk radio through the speakers. It starts when I power up the PC and stops when Windows starts.

Here's the setup between the PC and the speakers. The cable from the rear audio out jack goes to a RCA Audio/Video Selector. Two cables from the selector go to a Realistic SA-10 Amp. From the amp two cables connect to the speakers. Ther is no radio reciever on the circuit.

Anybody ever experienced this or have any idea what's going on? It's not a problem - I'm just curious.

 

[MisterEd]

This have been reported on for years even for people without computers. It usually related to powered speakers.

Here are a couple examples:

PC speakers also pick up radio
PC speakers also pick up radio | Computing | The Guardian

Why can I hear a radio station on my speakers even though they are not connected to an AM/FM receiver?
Why can I hear a radio station on my speakers even though they are not connected to an AM/FM receiver? - Quora

 

[file3456]

Try some of these. It may or may not work. It's basically intermod or harmonics. Intermodulation - Wikipedia


"snap on choke" in All Categories - PicClick

Also, make sure the equipment and computer are grounded.

Edit-


You may be near an AM station...

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Look here. AntennaSearch - Search for Cell Towers & Antennas

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Actually, go here. Find your coordinates here. Just enter 152 meters for the tower height.

This may be better, ASR Advanced Registration Search

 

[Phredtx]

Thanks for the info. I'm going to do a little research and check out my setup - especially the cabling. Of course, once I got interested in it - it stopped. I haven't heard anything since I posted here, but I think I found the culprit. I didn't mention an audio output cable from the RCA selector to a Sansui audio system. The power to the component is off. HOWEVER the cable is fairly long and it sometimes get into a loop. That sounds like an antenna.