Thanks for that workaround Steve, I must give it a try here. I can't understand why Elecraft don't give us the option of manual notch on SSB on the KX3, as I find the auto notch doesn't always lock onto weak but annoying heterodynes but could be easily notched out manually.
73 from David GM4JJJ > On 4 Mar 2016, at 05:33, WD4SDC <[email protected]> wrote: > > Greetings. > > You *can* use manual notch on SSB on the KX3. > > Turns out that if you turn on the manual notch while in CW mode that it will > stay on if you switch to SSB without cycling thru a mode that cancels it - > such as FM or data modes. > > Here's an example of how I did it. > Starting with LSB mode: > > A->B > MODE -> CW > FC -> +0.92 > BW=2.8KHz > RIT=-700Hz This removes (my) pitch offset and opens the bandwidth to > receive > LSB voice. > > Now you can turn on the notch filter and adjust to remove CW RFI. > Press A/B and turn off RIT to have SSB with manual notch enabled - and CW > removed! A/B allows me to go from CW to SSB w/o cycling thru FM, although I > could also disable FM mode. > > For USB, you would need to use CWR and RIT=+700Hz. > > Why this is desirable: > The auto-notch feature is great for intermittent tuneups or other (multiple) > CW signals in the SSB passband, but it is applied after the AGC, so if the > CW signal is much stronger than the voice signal, the voice signal is > suppressed even though the tone is removed - like when trying to copy an S3 > voice with a S9+20 CW sitting on it. > > For strong "persistent" CW QRM, using the manual notch removes the CW signal > *before* the AGC, allowing AGC to operate on the desired signal. This notch > is at least 80dB! The S9+20dB CW goes away, and S3 is perfectly readable! > Very cool! Especially useful if the CW signal is in the 500-1500Hz range - > making it difficult to remove with low or high pass BW adjustment and still > copy voice - you can, but it takes effort. > > I tried creating a macro for this - it kinda works. > > MD3;SWH20;MD1; > > Works, but the macro name covers up the notch frequency display in the VFOB > area. You *can* adjust the notch frequency even though you already in SSB > mode (if you turn the knob within the 2 sec window), but it's a blind > adjustment. And then the macro name sticks until you do something to update > the VFOB display (like adjust BW). If you just send the commands using the > KX3 utility program, it works great, but you need a pc :\. Perhaps there is > a macro work-around? > > 73 > Steve > WD4SDC > > > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/KX3-How-to-use-manual-notch-in-SSB-mode-tp7614894.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
