Browser on computer causes interferance for low bandwith fm stations

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SUMMARY

The discussion centers on the interference experienced by low bandwidth FM radio stations when a computer browser is opened, specifically with a KVM switch setup. Users reported that the interference occurs in the 80 MHz range and is exacerbated by the KVM switch, which may enhance the computer's video cables as antennas. Suggested solutions include using snap-on ferrite toroids to mitigate the interference and testing by unplugging the monitor to confirm the source of the problem.

PREREQUISITES
  • Understanding of KVM switches and their impact on signal transmission
  • Knowledge of FM radio frequency ranges, particularly 80 MHz
  • Familiarity with electrical interference concepts and shielding techniques
  • Experience with ferrite cores and their application in reducing electromagnetic interference
NEXT STEPS
  • Research the use of snap-on ferrite toroids for cable interference reduction
  • Explore methods for shielding cables and devices from electromagnetic interference
  • Investigate the effects of KVM switches on signal integrity and interference
  • Learn about the principles of radio frequency interference (RFI) and mitigation strategies
USEFUL FOR

This discussion is beneficial for electronics enthusiasts, radio hobbyists, IT professionals managing KVM setups, and anyone experiencing interference issues with FM radio signals due to computer usage.

DavoMarc
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Hi,

I have a computer set up with a KVM switch.
When using the computer and not opening a browser, IE or Firefox, the radio is fine.
When I open a browser I get interference on the radio ... Low frequency on the fm bW in the 80 Mhz range. If I open both browsers it completely kills the signal with noise. Upper frequencies past the 90 Mhz range are not effected. I am wondering as a curiosity what is happening and how the opening or use of ports on a computer can do this. Also, for giggles I'd like to know what the fix is for something like this.

Thanks in advance.

D
 
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Does it matter which website you are visiting?
 
Hi, Thanks for the quick response.
No it doesn't matter.

-D
 
All I can think is that whenever you are using a browser, there is electrical network activity - whether it's wifi or ethernet - and that's causing the interference.
 
Yes, that makes sense. This didn't happen until the KVM switch was installed. Some how that exacerbated it. Maybe I can somehow shield it. Thank you appreciate the information.
 
its radiation from your video signal or screen I would guess, set up the web page, and unplug your monitor and turn it off.
The interference will probably go away, the extra wires from the KVM switch is making your video cable a better antenna.
 

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