[TenTec] O2 Receive Insensitivity

[Carl Moreschi]

What do you have the RF gain set at?  Any chance you have inadvertently
switched the antenna for the main receiver to the wrong setting?  How about
the attenuator setting?

Carl Moreschi N4PY
121 Little Bell Drive
Bell Mountain
Hays, NC 28635
----- Original Message ----- 
From: <ac9s at mchsi.com>
To: <tentec at contesting.com>
Sent: Friday, October 20, 2006 10:57 PM
Subject: [TenTec] O2 Receive Insensitivity


> I have had a strange thing happen with my O2.  I have been impressed with
the
> sensitivity of the receivers, unlike my Pro.  However, in the last day or
two
> the main receiver seems to have gone very deaf. However, with the pre-amp
on I
> receive signals strongly.  It is currently 9:30pm on Friday evening and I
am
> listening to JARTS on 20 RTTY.  With no pre-amp I can barely hear AH7C and
> there is no indication of band activity on the band scope.  With the
pre-amp
> on AH7C is registering S9 and there are a whole bunch of copyeable RTTY
> signals showing strongly in the band scope.  In the past the pre-amp
seemed to
> give me about an S unit or so of increase on the S meter.  Now, it is the
> difference between nothing and S9.  The sub receiver appears to be hearing
> about the same as the main with the pre-amp, but of course I cannot see
its
> signals on the band scope.
>
> Has anyone else experienced these symptoms?  Is it possible I could have
had a
> static discharge on one of my wire antennas zap the main RX front end and
not
> bother the pre-amp if it was turned off?  I haven't normally used it.  I
am
> listening with the AGC set to the minimum of .37uv.
>
> My first thought was that the higher bands are completely dead at the
bottom
> of the cycle, but since I am hearing so well with the pre-amp on there
appears
> to be something else at play.
>
> Any thoughts anyone - before I contact Ten Tec?
>
> Thanks --- 
>
> Keith
> AC9S
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