[FADCA] KPC 3 Noise

Tue, 19 Aug 2003 14:54:28 -0400

Doug....

I have not heard of this problem previously.  Sounds like something has gone
astray inside the unit.  You might try opening the unit up and making sure
all the ICs inside are seated properly.  A loose connection could be causing
the grief.

73 de Paul-NA4AR

----- Original Message -----
From: "Doug Christ" <[email protected]>
To: <[email protected]>
Sent: Tuesday, August 19, 2003 2:44 PM
Subject: [FADCA] KPC 3 Noise

> At a recent hurricane seminar, I set up a portable APRS station which did
> not work. The KPC3 tnc was generating so much rf hash that it wiped out
the
> receiver on the HT. Heck, it even interfered with radios not even
interfaced
> into the APRS setup. The signal is full scale on the HT and the signal
> completely disappears when I power down the tnc. I even powered down the
> laptop and the tnc would be the only thing on. BTW, I was running it off
of
> a 9 volt battery, not a AC adaptor. I had noticed that I was having
problems
> in the past using this unit but usually I am at a FPAC switch working on
it
> so it really did not take much of a signal to make the tnc work.  I broke
a
> out a spare KPC3 only to discover the same problem. Someone ran home and
> grabbed their own KPC3 which worked better but still had the same
problems.
>
> Anyone have any ideas as to where this noise is coming from and what I can
> do to stop it? I used the same laptop, tnc and radio before for field day
> operations and it worked fine.
>
> Doug/KN4YT
>
>
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