[Kenwood] TS850 Drift

Tue, 22 Oct 2002 05:30:46 -0700

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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