AmateurRadio.com

 Below is a YouTube By PY1FR showing the APF on the K3 in action.

D3AA from Angola:  I  had seen for many evenings D3AA on the spotting networks, I found either there was a huge pileup trying to contact him OR he just was not there even after laying in wait on the frequency for 15 minutes or so. Then one evening as I was looking at my Elecraft P3 pan-adapter, I noticed a signal to one side of the frequency I was monitoring. I spun the VFO and to my surprise it was D3AA calling CQ!!! He was just above the noise and I could copy him fine so I called and he came back to me first call with a 559 and he is in the log. 

FP/VE2XB St.Pierre& Miquelon: These are French islands off the coast of New Newfoundland...Here in Ontario that is like next door when it comes to ham radio. It surely would be an easy catch and one for the DXCC  books.....WRONG......The propagation gods were not smiling down on me at all. Most of the time I could hear the pileup trying to work FP/VE2XB but that was it. Every night he was on and the spotting network had him being spotted from all over but could he be heard here at VE3WDM...NO!! It was with this contact I found my new strategy, to just sit on frequency and wait and see. One evening in came FP/VE2XB and after a few calls I got him in the log book.

UPDATE....I UPLOADED THE WRONG SOUND FILE....ALL IS GOOD NOW.

Here is an audio sample from my K3 of a DX-pedition operating split ( calling on one frequency and listening on another frequency)  using the main and sub-receiver. You can very clearly hear the pileup in one ear and the DX in the other ear...you have to have some headphones on to hear this. There is a point were a station is calling on the DX's  calling frequency.
This is just but another feature of the k3 that allows me to snag DX-peditions and add them to my DXCC count.

5N7M Nigeria: This contact was booming in and I called and he came back to me with 599 and that was it. Each night I have seen 5N7M spotted he has been booming, I wish all the DX was like this...oh well it would take the fun and challenge out of it. 

OY1CT Faroe islands: This group of islands is just above England and are Danish. To get this call into the log I had to pull out all the stops. He was fading in and out but when his signal was good it was about an S8 and then moments later just above an S2 noise level. I ended up making the contact when he was in around S3. I found I was watching my monitor that was displaying the feed from the Elecraft P3 pan-adapter. I could see his signal in the waterfall and it was then time to try the Audio Peak filtering along with Diversity receive. That did the trick here at the receive end but was my signal going to make it to him?? I gave him a call and he came back to me........well so I thought.....have you ever have this happen....You want to make the contact so bad that you "think" you hear your call but in fact it's just background noise?? This was what I thought was happening until he gave my call out again and this time he was S7 so the contact then was completed at my end.