[Premium-Rx] Harris 590H-Help

[Ahmet G.]

I added some filters to 590A. 455KHz filters with proper Impedance Matching
will do the job.  I believe the terminating Impedances are 2000 Ohms on the
filters Harris used. But using transformers other impedances can be used. I dont know if the response would be optimum as each filter has different loss curve.  i installed AM filter ( DSB ). but i think SSB filters have the same 455KHz IF.  Also changing the first IF filter, or Roofing filter may help with SSB. 590A has a 16KHz filter centered at 40,455 MHz, i changed this to a 10 KHz wide filter for AM.  

another point, if i am not mistaken the 3.1 KHz AM filter has a slightly different center freq as the oscillator changes freq when switched to 3.1Khz.  but you are more concerned with the replacing the SSB filters.

have a great day. Ahmet 


> 
> 
> Hello to the List,
> I have an Harris RF-590H receiver with 3.2 KHz SSB filters and wold 
> like to add narrow filters.
> My question is if is feasible and were is possible to find suitable filters?
> I have the RF-590A manual that hope is also applicable to the H model?
> Many thanks for the help
> Francesco IW2BRB
> ______________________

=
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