Dave,
Radio shack used to sell small isolating transformers and I thought
about trying that earlier. That might be a good work-around.
Odd it's only the one headphone and notshowing up on both sides. I'd
disassemble the thing but I can't see how to separate the different
parts of the ear piece itself and I'd hate to damage it, it's pricey.
Hmmm, I wonder if maybe the problem is in the cable?
More digging around like a badger...
Gary
KA1J
> Yes,
>
> A couple of decades ago I had the same set up almost with an FT1000. The FT
> power supply didn't like the the fact that I using a DSP599 with a
> difference power supply...different issue but similar symptom.
>
> Interesting problem....wonder what the matter is... could be a wiring defect
> in the headphones. You might try isolating transformers.
>
> 73,
> dave
> ----- Original Message -----
> From: "Gary Smith" <Gary@doctorgary.net>
> To: <Rfi@contesting.com>
> Sent: Wednesday, January 14, 2009 12:16 AM
> Subject: Re: [RFI] Hum in Bose QC2 headphones
>
>
> > Hi Dave,
> >
> > No, these are stereo jacks, the K3 is a dual receiver radio with
> > identical receivers which are a true diversity ensemble with one
> > receiver using one antenna and the other receiver using a different
> > one but simultaneously. (Check out the Jan 2009 QST). Having dual
> > receivers is an option but I have all the options (It is an
> > absolutely killer radio). FWIW, even when using the base K3 with none
> > of the options, you use stereo headsets and there is an audio effects
> > option you may select which sends the signals to each ear a bit out
> > of phase. It's actually a plus in copying weak signals But the
> > Diversity using my K9AY on one receiver and the Inverted L on the
> > other is nothing short of magic.
> >
> > Thanks for the thought though, I appreciate it.
> >
> > Gary
> > KA1J
> >
> >> 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
> >> > _______________________________________________
> >> > RFI mailing list
> >> > RFI@contesting.com
> >> > http://lists.contesting.com/mailman/listinfo/rfi
> >> >
> >>
> >> _______________________________________________
> >> RFI mailing list
> >> RFI@contesting.com
> >> http://lists.contesting.com/mailman/listinfo/rfi
> >>
> >
> >
> > _______________________________________________
> > RFI mailing list
> > RFI@contesting.com
> > http://lists.contesting.com/mailman/listinfo/rfi
> >
>
>
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|