[TenTec] Orion II AT tuner question

[Duane A Calvin]

Grant,
        Is that on the Orion II or the Orion?  On my original Orion with
the LDG-sourced tuner, there is a noticeable improvement (or attenuation)
of the RX signal after the tuner has been exercised.  (Attenuation in the
case of cross band split.)

        73,  Duane


On Fri, 31 Mar 2006 16:53:04 -0600 "Grant Youngman" <nq5t at comcast.net>
writes:
> > goes to the radio antenna switching logic.  The end result is 
> > the internal tuner is used on both the transmit and receive 
> > path but only for antenna 1.
> 
> That is what is shown in the schematics, but there is no schematic 
> of the
> tuner board, which may have a shorting relay that is only opened on
> transmit.
> 
> Regardless, there is no substantive difference in MDS with the tuner 
> in or
> out of the circuit, regardless of where the tuner was last set.  
> Which means
> that there wouldn't appear to be a need to transmit into the tuner 
> to reset
> it every time you changed bands, as far as receive capability is 
> concerned
> -- and that is my experience.  And also would indicate to me that 
> on
> receive, the tuner is effectively not part of the signal path.
> 
> Without a tuner schematic, we're feeling the side of the elephant 
> again.  If
> someone knows for sure, it would help, but it has no effect on 
> receive MDS.
> 
> Grant/NQ5T
> 
> 
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> 


--------------------------------------
Duane Calvin, AC5AA
Austin, Texas

http://home.austin.rr.com/ac5aa