Take a Softrock, add a 4 x 455Khz LO (Or create I-Q at 455Khz via a quadrature network) and insert it in the 455Khz IF of an existing receiver, preferably one with a wide IF ...
That is actually a better solution than using a SA602/612, I'm only using the 602's because they are easier for people to apply and understand .... remember the converter I'm making for the RX320D will be used my mainly non-amatuers/SWLers with basic electronics skills who aren't doing to want to mess with surface mount, LO's with digital dividers, etc .... I'm also working on a Tayloe Detector variant which uses switched output capacitors to take advantage of the detector's inherent filtering capabilities and the higher IIP3 and dynamic range with narrower bandwidths ... basically a 1Khz bandwidth for CW, 3Khz for SSB, 5 or 10Khz for AM, hi-fi SSB, etc. and a 48Khz for output to a soundcard for SDR .... coupled with a split supply low noise/high headroom audio frequency backend it's possible to have a receiver that blows away anything on the amatuer market today and gic\ves professional gear a run for it's money JR --- In [email protected], "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > > JR: > > If thats true where it is only I Q for a narrow band then something like the Soft rock 40 may be the more ideal model since there is two frequency divisions being fed to the quadrature transformer. As best as I understand the SR 40 circuit. A 14 Mkz and 7 Mhz range frequency as I recal. > > Dan > > > _____________________________________________________________________ > Call Anyone, Anytime, Anywhere in the World - FREE! > Free Internet calling from NetZero Voice > Visit http://www.netzerovoice.com today! > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
