[Elecraft] K3 with SDR-IQ

[Greg - AB7R]

If you are looking this this price range also consider the QS1R SDR.  I have it 
connected in the same fashion as Dave does with the Perseus.  

-------------------------
73,
Greg - AB7R
Whidbey Island WA
NA-065


On Tue Nov  4 14:11 , Dave G4AON  sent:

>Paul, I use a Perseus SDR (see QST for December 08 for the review, also 
>on the members site). Perseus has a USB2 interface rather than the 
>narrow band sound card approach. I don't use the IF out of the K3 with 
>Perseus, but connect them in parallel using an outboard ferrite splitter 
>on the RF IN/OUT of the K3's KXV3 interface module. Frequency "linking" 
>them via Ham Radio Deluxe so that either the K3 tunes the Perseus or 
>vice versa. The combination works very well, indeed the noise reduction 
>in the Perseus is superior to that in the K3. The receiver performance 
>is similar for both as the Perseus has a 3rd order IMD of 97 dB at 2 KHz 
>spacing.
>
>The only downside to Perseus is the current lack of support from 3rd 
>party programs which seem to favour the 192 KHz bandwidth simpler SDR 
>receivers (Perseus has 1600 KHz bandwidth). There is a comparison of 
>Perseus vs. SDR-IQ at: http://www.ssb.de/amateur/pdf/radcom_mar08.pdf
>
>73 Dave, G4AON
>K3/100 #80
>
>Has anyone had an opportunity to compare LP-PAN with the SDR-IQ using
>SpectraVue? I am interested in using the K3 in a compact, portable
>environment with my laptop PC where I would like to avoid the use of an
>external sound card if possible, and the SDR-IQ seems to meet this
>requirement.
>
>Moreover, with the N8LP I.F. buffer mod conducted on the K3, is there any
>reason to pursue any further I.F. level or impedance optimization when 
>using
>the SDR-IQ? Tnx!
>
>Paul, W9AC
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