[Kenwood] TS850 Drift

Tue, 22 Oct 2002 07:16:19 -0700

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
> >
> >
> >
> >
> >
> >
> > --- StripMime Report -- processed MIME parts ---
> > multipart/alternative
> >   text/plain (text body -- kept)
> >   text/html
> > The reason this message is shown is because the post was in HTML
> > or had an attachment. Attachments are not allowed.
> > Please post in Plain-Text only.---
> > - - -
> >
> > Your moderator for this list is:
> > Larry Wilson KE1HZ [email protected]
> >
> > _______________________________________________
> > Kenwood mailing list
> > [email protected]
> > http://mailman.qth.net/mailman/listinfo/kenwood
>
>
> --- StripMime Report -- processed MIME parts ---
> multipart/alternative
>   text/plain (text body -- kept)
>   text/html
> The reason this message is shown is because the post was in HTML
> or had an attachment. Attachments are not allowed.
> Please post in Plain-Text only.---
> - - -
>
> Your moderator for this list is:
> Larry Wilson KE1HZ [email protected]
>
> _______________________________________________
> Kenwood mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/kenwood
>

--- StripMime Report -- processed MIME parts ---
multipart/alternative
  text/plain (text body -- kept)
  text/html
The reason this message is shown is because the post was in HTML
or had an attachment. Attachments are not allowed.
Please post in Plain-Text only.---