I am using the K3 IF output extensively for I/Q downconversion and panadapter display. The IF Out connector makes this very easy.
But it would think it would be very useful to have a separate I/Q stream from the subreceiver (e.g. for monitoring a separate band, or a different segment of the same band). I'm wondering if a mod would be possible to allow access to the 2nd receiver IF, and if anyone has done this. 73, Thomas M0TRN -------------- Thomas, I modified my K3 to bring out the sub-Rx IF for eme dual-polarity diversity reception. The description how I did it is at: http://www.kl7uw.com/LINRAD.htm scroll down thru other topics of my project till you find: Connecting K3 Sub-Receiver IF to LP-Pan: I tapped the IF near jumper W-3 using a 0.001 uF disc ceramic cap and run the IF out thru an existing hole in the sub-Rx shield. I used a couple ferrite beads to decouple the cable common-mode field. I ran the RG-174 over to the existing BNC hole for the internal 2m transverter (which I do not have installed). You can run the RG-174 thru a small toroid core at the point the coax emerges from the hole in the shield for more isolation. I have my dual-Rx diversity system running on 2m-eme using MAP65v2.3 sw which is variant of JT65 which captures a bandspan up to 90-KHz decoding all signals inside the span. I am presenting a paper at MUD-2012 in San Jose on Oct. 19 on the topic. 73, Ed - KL7UW ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
