[R-390] DSP IF

[Mark Huss]

Being the proud owner of both an R-390A and a Ten-Tec RX-320, I have 
given this some thought.  Decided to try feeding the RX-320 from the IF 
Out of the R-390A.  the results were O.K.  Had 33 bandwidths, and 
passband tuning.  When I put everything back to normal, I noted that I 
could only pick up local AM stations on the RX-320!  A trip to Ten-Tec 
got the first Mixer FET's replaced.  Apparently you can get enough 
output from the R-390's IF Out to blow the input of the RX-320!  Be WARNED!

My next attempt is to build the downconverter and try the audio card 
route.  i rejected this at first because there is an annoying delay with 
these things.  My shack computer being an old 266 MHz computer.  
Previous attempts with this resulted in delays up to seven seconds in 
the audio.  Makes it  a real pain to tune with.  

Bill Levy wrote:

> Golly Cecil and Mike
> What a can of worms you have opened up.
> Why not just buy a DSP radio and tune it to 455 and plug that into the 
> 390a.
> Wouldn't that accomplish the same darn thing.
>
> Now no one say why go to the expense of another radio......thats what 
> we do fellows. Any excuse to try something requires a new radio!
>
> N2WL
>