heterodyne tones

[Dave K.]

Not sure if this is normal or not, but I hear what seems to be a heterodyne tone on mostly 20 and 15 meters, 14.000, 14.030, 14.091, also 21.022, 21. 053..(just a few freq examples) usually at S-9 levels. Can anyone explain, and should I be concerned?
Dave K.
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[John_N1JM]

If you disconnect the antenna, is it gone or reduced?

David Kowalewski wrote

Not sure if this is normal or not, but I hear what seems to be a heterodyne tone on mostly 20 and 15 meters, 14.000, 14.030, 14.091, also 21.022, 21. 053..(just a few freq examples) usually at S-9 levels. Can anyone explain, and should I be concerned?
Dave K.
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[K5DNL]

David,

I have found many devices in the shack that cause Birdies
1 - My new Laser printer
2 - The video camera on my EME tower.
3 - computer and computer monitors.

Try turning everything off in your shack and see if that helps.

73 HNY Ken K5DNL

---------------------------------------------------------------

--- On Fri, 1/1/10, David Kowalewski <[hidden email]> wrote:

> From: David Kowalewski <[hidden email]>
> Subject: [Elecraft] heterodyne tones
> To: [hidden email]
> Date: Friday, January 1, 2010, 10:00 AM
> Not sure if this is normal or not,
> but I hear what seems to be a heterodyne tone on mostly 20
> and 15 meters, 14.000, 14.030, 14.091, also 21.022, 21.
> 053..(just a few freq examples) usually at S-9 levels. Can
> anyone explain, and should I be concerned?
> Dave K.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

     
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[k1tl]

Dave,

I have similar "hetrodynes" on 15m and they are from my computer. When I
turn the computer off, they "disappear".

Tom/k1tl...
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