Apprently, this is a common problem with FT-920's and their mic inputs.
I don't know the resolution.
============================================================
From: "Magnus A" <sm6wet@telia.com>
Date: 2004/04/06 Tue AM 10:13:00 CDT
To: <writelog@contesting.com>
Subject: Re: [WriteLog] Hum in Audio
I tried that too, and I tried with only 5 watts, still the same problem.
Could it be that the problem goes away if I trancieve thru the comp (connect
the mike to the computer instead of radio)????
Anyone knows?
73 Magnus
----- Original Message -----
From: "Bob Naumann - N5NJ" <n5nj@gte.net>
To: "Magnus A" <sm6wet@telia.com>; <writelog@contesting.com>
Sent: Monday, April 05, 2004 12:29 PM
Subject: Re: [WriteLog] Hum in Audio
> I suspect that the patch input is connected in "parallel" (at the same
time) and may be the cause of the problem. If you use the data input, it
might not cause the same problem. Worth a try.
>
> > ------------Original Message------------
> > From: "Magnus A" <sm6wet@telia.com>
> > To: <writelog@contesting.com>
> > Date: Sun, Apr-4-2004 10:56 PM
> > Subject: Re: [WriteLog] Hum in Audio
> >
> > I have it connected to Patch in and AF out.
> > Maybee the datajack will work better???
> >
> >
> > ----- Original Message -----
> > From: "Bob Naumann - N5NJ" <n5nj@gte.net>
> > To: "Magnus A" <sm6wet@telia.com>; <writelog@contesting.com>
> > Sent: Monday, April 05, 2004 1:51 AM
> > Subject: Re: [WriteLog] Hum in Audio
> >
> >
> > > Where do you have the computer audio connected to on the radio?
> > >
> > > > ------------Original Message------------
> > > > From: "Magnus A" <sm6wet@telia.com>
> > > > To: <writelog@contesting.com>
> > > > Date: Sun, Apr-4-2004 4:51 PM
> > > > Subject: Re: [WriteLog] Hum in Audio
> > > >
> > > > Hello Irek!
> > > >
> > > > I do use a transormer!
> > > >
> > > > 73 Magnus
> > > >
> > > > ----- Original Message -----
> > > > From: "VE4COZ" <ve4coz@shaw.ca>
> > > > To: "Magnus A" <sm6wet@telia.com>
> > > > Sent: Sunday, April 04, 2004 7:09 PM
> > > > Subject: Re: [WriteLog] Hum in Audio
> > > >
> > > >
> > > > > Hello Magnus
> > > > >
> > > > > You need to use transformer between sound card and radio input.
> > > > > {Ground loop}
> > > > >
> > > > > Good luck
> > > > > 73, Irek VE4COZ
> > > > >
> > > > > _______
> > > > > _________________________________________________
> > > > >
> > > > > R 73 de Irek VE4COZ ex SP6COZ
> > > > > T Winnipeg, MB. The RF black hole and aurora zone.
> > > > > T Noise, Noise. Solid noise even s9 sometimes !!!!
> > > > > Y Email - ve4coz@qsl.net or ve4coz@rac.ca
> > > > > Amateur Homepage - http://www.qsl.net/ve4coz
> > > > > ________________________________________________________
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Magnus A wrote:
> > > > >
> > > > > >I recently purchased Writelog but is not yet been using it as I
been
> > > > > >experimenting geting everything working.
> > > > > >One thing is though that I have to get fixed before I can use it.
> > > > > >
> > > > > >It a bad hum/distortion on my transmitted audio but it does not
come
> > from
> > > > > >computer audio.
> > > > > >
> > > > > >One night I had set up writelog and was trying to decode som CW
and
> > RTTY
> > > > > >just for fun, later that evening was a local 6m contest and using
the
> > > > same
> > > > > >FT-920 as I had to decode with I used on the 6m contest.
> > > > > >
> > > > > >I was getting bad results and nearby station told me the truth
that I
> > > > > >sounded distorded or maybee even had a carrier on SSB.
> > > > > >
> > > > > >After alot of experimenting with changing PSUs and microphones I
just
> > > > > >disconnected the wireing going to my radio from the computer (not
the
> > > > > >RS-232) and all of a sudden the problem was gone.
> > > > > >
> > > > > >The was I did this was to test to record myself with the built in
> > voice
> > > > > >recorder on the ft-920. If computer was connected to the radio
and I
> > > > played
> > > > > >up my recording I would sound distorded, if I unhooked the wires
I
> > would
> > > > > >sound great.
> > > > > >
> > > > > >* Note. I did not use the voice keyer, I was simply using the
Heil
> > > > headset
> > > > > >into my Mic port on the 920.
> > > > > >Later I tried to connect my original handmic and got the same
problem
> > > > when
> > > > > >my computer was rigged to my 920.
> > > > > >
> > > > > >I have also tried to ground my rig to the chassi of the computer
but
> > I
> > > > have
> > > > > >the same problem still.
> > > > > >
> > > > > >Please help
> > > > > >
> > > > > >I been looking thru archieves but missed any info that might help
me.
> > > > > >
> > > > > >73 Magnus - SM6WET (8S6T in contest)
> > > > > >
> > > > > >_______________________________________________
> > > > > >WriteLog mailing list
> > > > > >WriteLog@contesting.com
> > > > > >http://lists.contesting.com/mailman/listinfo/writelog
> > > > > >WriteLog on the web: http://www.writelog.com/
> > > > > >
> > > > > >
> > > > > >
> > > >
> > > > _______________________________________________
> > > > WriteLog mailing list
> > > > WriteLog@contesting.com
> > > > http://lists.contesting.com/mailman/listinfo/writelog
> > > > WriteLog on the web: http://www.writelog.com/
> > > >
> > > _______________________________________________
> > > WriteLog mailing list
> > > WriteLog@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/writelog
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> >
> > _______________________________________________
> > WriteLog mailing list
> > WriteLog@contesting.com
> > http://lists.contesting.com/mailman/listinfo/writelog
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> >
> _______________________________________________
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