[bars] Noise

[Leandra MacLennan]

End fed antennas will cause this problem if the coax feeding the antenna is too short. End fed antennas should always be fed with at least 20 feet of coax. If your radio is indoors the 20 feet minimum of coax is the length of the coax outdoors. Use more than 20 feet of coax with end fed antennas if possible. Better yet, try a dipole antenna to see if that reduces the problem.

If your speaker wires are parallel to your antenna they will pick the RF energy from your antenna. Reorient the speaker wires to be perpendicular to your antenna and see if that reduces the problem.

-Leandra AF1R

> On May 31, 2023, at 9:24 AM, gmm via bars <bars at w1hh.org> wrote:
> 
> 
> Common problem.
> Chokes can help.
> Its hard to tell how the RF is getting into which part of the audio system.
> 
> Speakers:
> Use the shortest amount of cable for speakers.
> Take excess cable and roll it in a loop and attache a choke around the loop.
> 
> Add chokes to computer AC cable, etc.
> 
> 
>> On 5/31/2023 10:53 AM, KC1SOZ wrote:
>> If i am getting noise on my computer speakers when i transmit on my HF radio, and I don't want to move the speakers because I use them daily, is the solution to put a choke on the coax?
>> 
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> 
> 
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