These less crowded bands put your transmission high in the sky and above the noise.
The three frequency operation lets you win the battle of the bands and communicate clearly on 6m, 10m and 12m frequencies. Now you can skip the jams and head for the wide open spaces with the FT -650 from Yaesu.
Just use HDSDR and the built-in RX/IQ.2 Sensational Noisy, crowded frequencies are about as productive as motorways at rush hour. So if you're lusting after that pretty display in the IC-7300 and don't want to shell out for another shiny toy, you can at least get a pretty display out of your KX3 without buying a PX3. So it will let you know if you have grounding problems.
When I first set this up I had insufficient station grounding and saw a lot of artifacts in HDSDR that were due to bad grounding between my PC and the radio.
If you see a bunch of "lines" in the waterfall display that do not correspond to signals and if there is a thick signal line right at your input frequency then your station grounding is insufficient. I'm not sure what the available bandwidth from the KX3 RX/IQ actually is but on all the PCs I've tried it with a bandwidth of 44100 seems to work best. Then choose your sound card bandwidth setting in HDSDR. Run the KX3 RX/IQ cable to your mic input on your PC. Lastly make sure RX/IQ output is turned on in your KX3 by setting MENU: RX I/Q to ON. Everything else should be set as shown.Ĭhoose the Omni-rig configuration as shown below to match your station settings. So to set your CW offset correctly put your sidetone Hz as a negative number in CW_L and subtract your sidetone from 1000 Hz and put that value in CW_U as shown below. Also be sure that you haven't inadvertently set CW reverse on some bands because that will really have you pulling your hair out as you try and figure out why the signals line up on some bands but not others. Make note of your side tone Hz setting on your KX3 by pressing and holding the CMP/PITCH button. The only part that trips me up each time is configuring the CW offset in. So the setup is in two parts, configuring Omni-rig and secondly configuring four your sound card.Ĭonfiguration for the KX3 is mostly straightforward. It interfaces to the control the radio using Omni-rig software. It can be fed from an SDR or from your sound card. HDSDR is a really nicely done program, doubly so because it's free. It's been over a year since I had this setup and I've switched computers so I had to go throuth the setup again and I thought it was worth documenting in case there are others that want to do this with their KX3's. So I've been operating my KX3 at the desk this week using its built in RX/IQ to feed HDSDR to see if I like the idea enough to spend the money on doing this for the Eagle. I would still need to buy an external SDR and it should be a good quality one or there's little point.
There's a tiny coax that would need to be spliced into which Paul assures me is doable mod with the right equipment. That line is switched out on transmit by the Eagle to protect its own receiver so no separate switching circuit is required. One option for an older Eagle like mine is to take the input for a SDR straight from the input of the Low Pass Filter.