FW: [Kenwood] TS850 Drift

Tue, 22 Oct 2002 09:41:04 -0700

-----Original Message-----
From: Brown, James E LRDOR 
Sent: Tuesday, October 22, 2002 12:40 PM
To: 'John Tait'
Subject: RE: [Kenwood] TS850 Drift

John,

The drift occurs even when the F. Lock in engaged.  This would eliminate the
tuning knob as the cause, would it not?

Jim  W4LC

-----Original Message-----
From: John Tait [mailto:[email protected]]
Sent: Tuesday, October 22, 2002 12:30 PM
To: Brown, James E LRDOR; 'Clif Holland'
Cc: [email protected]
Subject: Re: [Kenwood] TS850 Drift

Subject: RE: [Kenwood] TS850 Drift

Tighten the tuning knob slightly..(the ring on the inside of the knob..) The
tuning knobs are not balanced, so if the brake is completely off, the knob
will freewheel slightly from where you put it..
   73
       John EI7BA

>
> Ok.  Thanks anyway.
>
> It still has the original battery from 1995.  I don't suppose that would
> have anything to do with it?
>
>
> -----Original Message-----
> >From: Clif Holland [mailto:[email protected]]
> Sent: Tuesday, October 22, 2002 10:25 AM
> To: Brown, James E LRDOR
> Subject: Re: [Kenwood] TS850 Drift
>
>
> Have you considered a good exorcist???
>
> Seriously I don't have any idea.
>
> Clif Holland,  KA5IPF
> AVVid
> Authorized Kenwood and Icom Service
> www.avvid.com
> 1-800-214-5779
> 972-554-6801
> ----- Original Message -----
> >From: "Brown, James E LRDOR" <[email protected]>
> To: "'Clif Holland'" <[email protected]>
> Cc: <>
> Sent: Tuesday, October 22, 2002 9:16 AM
> Subject: RE: [Kenwood] TS850 Drift
>
>
> > The displayed frequency is moving.  Apparently, the actual frequency is
> > moving as well.  At least, the receive frequency is actually moving,
since
> > when I move the tuning knob to re-set the frequency back to where I
> > orginally had it, the pitch of the received RTTY tones changes and I see
> an
> > indication of the retuning on the KAM+ TNC tuning LEDs.  This means that
> the
> > receive frequency actually HAS drifted.  As far as the Xmit frequency,
> > there's no way I can tell if it drifted also (but I assume it has).  We
> are
> > talking about a very small amount here, and would not be noticeable on
the
> > other station's end during a brief contest QSO.
> >
> > I tried switching to VFO B, and it does the same thing there as well.
> >
> > The RIT control functions normally.
> >
> > If I leave the rig in receive only, and don't Xmit, I don't see the
drift.
> >
> > -----Original Message-----
> > From: Clif Holland [mailto:[email protected]]
> > Sent: Tuesday, October 22, 2002 9:53 AM
> > To: Brown, James E LRDOR
> > Subject: Re: [Kenwood] TS850 Drift
> >
> >
> > Is the displayed freq moving or just the transmit freq???
> >
> > Clif Holland,  KA5IPF
> > AVVid
> > Authorized Kenwood and Icom Service
> > www.avvid.com
> > 1-800-214-5779
> > 972-554-6801
> > ----- Original Message -----
> > From: "Brown, James E LRDOR" <[email protected]>
> > To: "'Clif Holland'" <[email protected]>
> > Cc: <[email protected]>
> > Sent: Tuesday, October 22, 2002 7:30 AM
> > Subject: RE: [Kenwood] TS850 Drift
> >
> >
> > > Clif,
> > >
> > > Thanks for the response.
> > >
> > > I wasn't using a bug.  I was using FSK mode in the RTTY contest. The
PC,
> > > contesting software and TNC were keying the TS850 directly.
> > >
> > > Anyway, I thought about stray vibrations moving the knob, since it is
> set
> > > with very light friction.  So I engaged the F. Lock.  However, the
> problem
> > > continued.
> > >
> > > NR1DX has suggested that RF may be getting into the "up/down" control
> > lines
> > > that a microphone with up/down buttons uses to control frequency.  I
> don't
> > > have an up/down mic (like the MC-60) attached ( I have a Heil), but
> maybe
> > > that makes no difference.  He suggests ferrites on the mic cord.
> > >
> > > W1ZC suggests faulty -8 & +8 vdc regulators (7808s) on the main
> regulator
> > > board.
> > >
> > > Do you have any advice?
> > >
> > > Thanks Jim   W4LC
> > >
> > >
> > > -----Original Message-----
> > > From: Clif Holland [mailto:[email protected]]
> > > Sent: Monday, October 21, 2002 8:20 PM
> > > To: Brown, James E LRDOR
> > > Subject: Re: [Kenwood] TS850 Drift
> > >
> > >
> > > The side to side motion of the bug caused the knob to turn. Tighten
the
> > > friction setting...
> > >
> > > Clif Holland, KA5IPF
> > > We have moved, do you have the new address??
> > > AVVid
> > > Authorized Kenwood and Icom Amateur Service
> > > www.avvid.com
> > > 1-800-214-5779
> > >
> > >
> > > ----- Original Message -----
> > > From: "Brown, James E LRDOR" <[email protected]>
> > > To: <[email protected]>
> > > Sent: Monday, October 21, 2002 7:31 AM
> > > Subject: [Kenwood] TS850 Drift
> > >
> > >
> > > > While operating in the JARTS RTTY contest this weekend, I noticed a
> > slight
> > > > drift in my frequency.
> > > >
> > > > This change was very small and seemed to happen only on transmit,
e.g.
> > If
> > > I
> > > > was CQing on 14.082, it would change to 14.081 then 14.080 then
14.079
> > > etc.
> > > > at the rate of about one change per minute or so.  Always downward.
> > > >
> > > > This was a real change in frequency, not just a change in the
display.
> > > All
> > > > other operations seem normal.
> > > >
> > > > Any advice appreciated.
> > > >
> > > > Thanks      Jim      W4LC
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
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