Message-ID: <001801c1a97f$8caa5b40$1700a8c0@home>
From: "Dave Pick" <g3yxm@wireless.org.uk>
To: rsgb_lf_group@blacksheep.org
References: <639D20177889D41198A600508BAD3CA103741EE9@capella3.oss.akzonobel.nl>
Subject: LF: Re: TS850s
Date: Wed, 30 Jan 2002 11:16:22 -0000
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Wil.

It sounds like a similar problem to the one I had with my TS850.
As I rotated the "slope tune" controls I would get different unwanted tones
as well as the desired one.
The fault lay with the DDS chips on the "CAR" unit which generates all the
mix frequencies from the 20MHz master clock. You can listen to these outputs
on another receiver and see which one is faulty. You then need to replace
the appropriate Kenwood DDS chip and here's the bad news... they cost Ł30
each (50 Euro) from a Kenwood dealer and are surface mount!
They aren't the very small format surface-mount chips so they can be changed
with a steady hand and normal tools.
I have had to replace two of these chips in my radio so they are a point of
failure.

Sorry to bring bad news!

73
Dave
G3YXM.

> I have problems listening on LF the last weeks.
> My TS850s is providing me with "aurora"-like hissing sounds instead of
clear
> tones as I try to copy cw stations.
> Using it for transmitting I get reports like 596 indicating that the
> problems occurs also in transmitting mode.
> I have been busy trying to find the problem but without success.
> Is there anybody in the group who recognizes this description and has
found
> a solution for this problem?
>
> Wil - PA0BWL
>
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