[Elecraft] Panadapter for K3 IF

[James Duffey]

   Lyle and all - You wrote:

"You want the softrock injection on the LOW side of 8.215 MHz.  I  
can't tell
you what the best frequency might be because I don't know, but I  
suspect 8.200
or thereabouts. "

If you place the local oscillator on the low side of the IF by an  
amount slighter greater than the IF bandwidth you don't need an I/Q  
or software receiver at all do you? The signals you want will be in  
the IF pass band above the local oscillator and the images will be  
below the oscillator, you will get single signal reception from a DC  
receiver. You will need a wide audio filter, but you may be able to  
implement a simple one in the computer. Dave Benson's Warbler on 80 M  
uses this technique. Then just use one of many spectrum analyzer  
programs for your shack computer to display the signals in the  
bandwidth. These are usually good to at least 20 kHz or half the  
sampling rate. Or am I missing something simple? - Duffey