Dave - that is probably the worst possible way to use an Orion - and was the
source of all sorts of issues when Orion first came out . You are right,
this was discussed at length - but has not been talked about for quite
awhile now.
Quick simple answer is run AF gain about 1/2 to 2/3 and control with RF
Gain. If you look at the Ten Tec site there are papers on optimum use of
Orion AGC for weak signals , for contesting etc . There is also some writeup
in the manual for both the 565 and the 566 .
If you cannot find the stuff - let me know off line and I will dig some out
.
73 de hank K7HP
----- Original Message -----
From: "David Feldman" <wb0gaz@yahoo.com>
To: <tentec@contesting.com>
Sent: Wednesday, November 10, 2010 3:10 PM
Subject: [TenTec] Need help understanding Orion II receive artifact
> Recently used an Orion II (on CW), receiving on bands crowded with many
> very strong CW signals (and a fairly large antenna). I noticed sometimes a
> condition where the receiver seemed to momentarily lose sensitivity (when
> listening to a rather weak intended signal) at the symbol rate of a
> stronger signal just outside the DSP passband, as if whenever the strong
> out-of-passband signal was present, in-passband gain would decrease. This
> was significant enough to affect my ability to read CW from the intended
> (weak) station. Is there a name for this artifact? Can it be controlled by
> proper adjustment of the receiver (I was using the receiver at full RF
> gain, no attenuation, no preamp enabled.) Sorry if this has been discussed
> before (or discussed to death) as I don't read the reflector digest
> regularly.
>
> Thanks,
>
> Dave
>
>
>
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
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