The hum induced in transmitted signals was caused by the 60 Hz AC field
from the power transformer coupling into the PTO. Apparently the PTO
coils are very sensitive to induced magnetic fields. The Corsairs
and Omnis use PTO's but the Paragon uses a synthesizer, so this is
probably not your problem. See if it happens on every band. You may
actually have an RF groundign problem or stray RF in the shack.
73, Bob WB2VUF
John L Merrill wrote:
>
> As I recall from a QST review, there was a problem of induced ac when the
> supply was close to one side of the radio, causing the transmit signal to
> sound bad. You might try putting the power supply on the other side of the
> radio and far away as possible.
>
> ----- Original Message -----
> From: "Mike Siegel" <ki6pr@elite.net>
> To: <tentec@contesting.com>
> Sent: Wednesday, September 06, 2000 11:06 AM
> Subject: [TenTec] 961 P/S Xmit Noise?
>
> >
> > Greetings All,
> >
> > When I first purchased my Omni-V (many years ago), it came with a Model
> 961
> > P/S. I vaguely remember some reports of noise generated by the supply.
> >
> > Since then, I have been using the supply to operate a Paragon (for several
> > years, in fact). Recently, I started receiving reports of RF on my audio.
> > After some checking around, it appears to be only on certain frequencies,
> > and the problem seems to clear up (mostly) when the P/S is moved away from
> > the rig.
> >
> > Is there another fix, or mods to reduce the problem? The P/S cable is only
> > so long, so I can only get so much separation from the rig. Other
> > suggestions?
> >
> > Thanks & 73,
> > Mike KI6PR
> > El Rancho R.F., CA
> >
> >
> >
> > --
> > FAQ on WWW: http://www.contesting.com/FAQ/tentec
> > Submissions: tentec@contesting.com
> > Administrative requests: tentec-REQUEST@contesting.com
> > Problems: owner-tentec@contesting.com
> >
> >
>
> --
> FAQ on WWW: http://www.contesting.com/FAQ/tentec
> Submissions: tentec@contesting.com
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> Problems: owner-tentec@contesting.com
--
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