Perhaps the radio is a mono output and the headphones are stereo...when used
with a mono jack you may be shorting one side to a ground loop... try
getting a mono to stereo converter jack.
73,
dave
wa3gin
----- Original Message -----
From: "Gary Smith" <Gary@doctorgary.net>
To: <rfi@contesting.com>
Sent: Tuesday, January 13, 2009 11:09 PM
Subject: [RFI] Hum in Bose QC2 headphones
> Though not a RFI issue, perhaps someone has the solution?
>
> When I connect my Bose QC2 noise cancelling headphones to my K3 I get
> a hum which is only heard in the right headphone. It sounds like a 60
> cycle hum and touching anything metal in any way connceted to the
> radio resolves the problem completely.
>
>
> I've turned off all the different pieces of gear associated with the
> radio and I can get some reduction, just not an elimination of the
> buzz. If I were to say attach a wire to my wrist while at the
> station, it would be perfect. Of course that's not a good option for
> several reasons but it does resolve the issue.
>
>
> I remember this being an issue when I tried these with my laptop. The
> headset works great with my MP3 player with no hum. The hum is only
> when plugged in & when used strictly for noise cancelling, they work
> great. These headphones are awesome for CW and I would like to find a
> workable fix if possible.
>
> Idears?
>
> Thanks,
>
> Gary
> KA1J
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>
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