[R-390] DSP IF

[Cecil Acuff]

The thoughts of an  455 Khz IF based DSP filter system has been rolling 
around in the back of my head for quite some time.  An outboard accy. of 
that type would be very popular considering the number of radios that use 
the 455 Khz IF.  I might try sending the IF output from my R-390A to the 
antenna port on my Icom 756 Pro II and use the Pro as an IF/Processor/Demod 
and see how things stack up...

My understanding is that DSP processors that go up to 455 Khz are quite 
expensive and mostly smoke and mirrors at this point.  You'd have to down 
convert to something lower....

Cecil...
----- Original Message ----- 
From: "Bob Camp" <ham at cq.nu>
To: "Dave Maples" <dsmaples at comcast.net>
Cc: "R-390 HF Receiver List" <r-390 at mailman.qth.net>
Sent: Thursday, April 21, 2005 6:32 PM
Subject: [R-390] DSP IF


> Hi
>
> The idea of putting a DSP IF processor on the IF output of an R390 sounds 
> like an interesting project. The nice thing about the 390 is that you can 
> get at both the IF output *and* the AGC chain without modifying the radio 
> at all. Given the high performance RF section and the mechanical filters 
> the result should be very competitive.
>
> Of course this gets into the general direction of witchcraft and the like 
> ....
>
> Enjoy!
>
> Bob Camp
> KB8TQ
>
>
>
> On Apr 21, 2005, at 5:22 PM, Dave Maples wrote:
>
>> All: Hmmm...why stop there?  Get a large touch-screen display so the 
>> radio
>> can REALLY be "man-sized", and follow this with a hue-changing routine 
>> where
>> the panel, knobs, and display fade from color to color.
>>
>> Add DSP to correct distortion in the audio chain.
>>
>> Possibilities are endless...
>>
>> Dave WB4FUR
>>
>> -----Original Message-----
>> From: r-390-bounces at mailman.qth.net
>> [mailto:r-390-bounces at mailman.qth.net]On Behalf Of Barry
>> Sent: Wednesday, April 20, 2005 5:49 PM
>> To: r-390 at mailman.qth.net
>> Subject: Re: [R-390] Crayola front panels
>>
>>
>> Don't paint the front panel at all.  Mount motor drives on all front 
>> panel
>> controls with the appropriate serial/parallel interface to a computer
>> program that looks like the front panel.  Put the R390x right up next to 
>> the
>> antenna to eliminate any feedline loss.  Run the controlling wires from
>> there to the computer.
>>
>> Change the color any way you want, any time you want.
>>
>> Barry(III) - N4BUQ
>>
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>
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