Ten Tec Scout and Argo mixing Freqs.

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From: rohre (rohre@msmailgw1.arlut.utexas.edu)
Date: Tue Mar 14 1995 - 12:45:37 EST


Mike here are the frequencies per manual:

1. PTO: Tunes 2.2 M Hz to 2.7 except on 160M where it goes 2.5 to 2.7 to
stay out of the band.

2. IF is 6.144 M Hz

3. The mixing products appear as 2fx0 + 2fpto-fi where fi is 6.144 M Hz, and
of course fpto is nominally 2.2 to 2.7 as stated. This equation will give you
the spurious products that could happen.

4. there is a 3 M Hz LP Filter in the PTO output line that goes throught the
plug in.
However, on 160 this is replaced in that module by a 2.5 M Hz high pass filter.

5. Crystal frequencies by band: 160M uses 5.444 M Hz
                                                               80
7.444
                                                               40
10.944
                                                               30
13.944
                                                               20
5.656
                                                               17
9.656
                                                               15
12.656
                                                               12
16.156
                                                               10
a19.656
                                                                                
b20.156
For those not familiar, 10 meters is switch selected on the module to cover 28.0
to 28.5 or 28.5 to 29.0. It looks feasible to modify a ten meter plug in module
to cover the next segment if the crystal was changed, thus giving receive
ability on the satellite down link frequencies on 10 meters. (29.0 to 29.5 Mhz).

Hope the above is helpful to those experimenting with frequency coverage.

--Stuart K5KVH
                                                               


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