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Re: if from 430 subband of ts790



-----Ursprüngliche Nachricht-----
Von: Schayk A.H. (Andre) van <A.H.Schayk@arcadis.nl>
An: 'amsat-bb@amsat.org' <amsat-bb@AMSAT.Org>
Datum: Dienstag, 28. März 2000 10:32
Betreff: [amsat-bb] if from 430 subband of ts790


 >Does anyone know the bandwith of the subband if signal going from the 430rf
 >board to the if board of the ts-790.


The TS790 has a 70,4515 MHz 1st IF, the impedance of the mixer output
and filter input is approx. 450 Ohm. There is no filter at this point,
you will be able to receive any frequency around the frequency shown
on the display.

 >I'm experimenting with a self tuning if for easy satelite work but i need a
 >if frequentie of around 10.7 to do this and the if from the 790 is easy to
 >bring out the back.


I have made a wideband receiver for TS790 which converts the 70,4515 to
10,70 MHz and demodulates a 80 kHz wide band to receive high speed packet
with 38k and 76k Baud. Perhaps, this board would be good for your
application
too? For more, see the page http://symek.com/sat/ifd.htm

73! Ulf, DK9SJ@qsl.net


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