K3 SSB Filters
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Been interesting reading the comments on SSB contesting and filtering. As a serious SSB contester from way back in the 80s, side rejection from other contesters (especially where we are all bunched up on 40 meters and also when the shortwave broadcast stations come on) has always been a topic of conversation with my fellow ssb ops -- which radio to buy, which filter to use, dsp, etc.
I have the 2.1 khz, 8 pole roofing filter installed in by my K3s BTW. With that said, I think the bleeding over QRM from other ssb stations (especially on 40 meters) is just the “nature of the beast” with ssb contesting. And boy is it a killer on the ears during and after a contest Anxious to hear other comments from other. David ND4Y Sent from Mail for Windows 10 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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David,
I'm looking to upgrade my filters for SSB. I have the 2.8 filter installed, which has steeper skirts than the 2.7. I'm wondering if the 2.1 would have a noticeable enough effect to justify the cost. -de John NI0K David Smith wrote on 3/31/2020 10:26 AM: > Been interesting reading the comments on SSB contesting and filtering. As a serious SSB contester from way back in the 80s, side rejection from other contesters (especially where we are all bunched up on 40 meters and also when the shortwave broadcast stations come on) has always been a topic of conversation with my fellow ssb ops -- which radio to buy, which filter to use, dsp, etc. > I have the 2.1 khz, 8 pole roofing filter installed in by my K3s BTW. With that said, I think the bleeding over QRM from other ssb stations (especially on 40 meters) is just the “nature of the beast” with ssb contesting. And boy is it a killer on the ears during and after a contest > Anxious to hear other comments from other. > > David ND4Y > > > Sent from Mail for Windows 10 > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Why go halfway? I would go with the 1.8 as a roofing filter. Crank the
DSP down to 1.6 and slew the passband to get the best readability. Buck, k4ia Honor Roll 8BDXCC EasyWayHamBooks.com On 3/31/2020 12:17 PM, John Simmons wrote: > David, > > I'm looking to upgrade my filters for SSB. I have the 2.8 filter > installed, which has steeper skirts than the 2.7. I'm wondering if the > 2.1 would have a noticeable enough effect to justify the cost. > > -de John NI0K > > David Smith wrote on 3/31/2020 10:26 AM: >> Been interesting reading the comments on SSB contesting and >> filtering. As a serious SSB contester from way back in the 80s, side >> rejection from other contesters (especially where we are all bunched >> up on 40 meters and also when the shortwave broadcast stations come >> on) has always been a topic of conversation with my fellow ssb ops -- >> which radio to buy, which filter to use, dsp, etc. >> I have the 2.1 khz, 8 pole roofing filter installed in by my K3s BTW. >> With that said, I think the bleeding over QRM from other ssb stations >> (especially on 40 meters) is just the “nature of the beast” with ssb >> contesting. And boy is it a killer on the ears during and after a >> contest >> Anxious to hear other comments from other. >> >> David ND4Y >> >> >> Sent from Mail for Windows 10 >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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Having the 1.8 kHz in my K3S, I know what and how it works.
I work 2 SSB traffic LSB nets which both have LSB nets which are 2 kHZ above my net frequency. That means at least 700 Hz to 1000 Hz of their primary signal is in my receiver passband. The 1.8 kHz filter, the DSP at 1.8 kHz and using SHIFT handles the issues nicely. Bob, K4TAX Sent from my iPhone > On Mar 31, 2020, at 5:33 PM, Buck <[hidden email]> wrote: > > Why go halfway? I would go with the 1.8 as a roofing filter. Crank the DSP down to 1.6 and slew the passband to get the best readability. > > Buck, k4ia > Honor Roll > 8BDXCC > EasyWayHamBooks.com > >> On 3/31/2020 12:17 PM, John Simmons wrote: >> David, >> I'm looking to upgrade my filters for SSB. I have the 2.8 filter installed, which has steeper skirts than the 2.7. I'm wondering if the 2.1 would have a noticeable enough effect to justify the cost. >> -de John NI0K >> David Smith wrote on 3/31/2020 10:26 AM: >>> Been interesting reading the comments on SSB contesting and filtering. As a serious SSB contester from way back in the 80s, side rejection from other contesters (especially where we are all bunched up on 40 meters and also when the shortwave broadcast stations come on) has always been a topic of conversation with my fellow ssb ops -- which radio to buy, which filter to use, dsp, etc. >>> I have the 2.1 khz, 8 pole roofing filter installed in by my K3s BTW. With that said, I think the bleeding over QRM from other ssb stations (especially on 40 meters) is just the “nature of the beast” with ssb contesting. And boy is it a killer on the ears during and after a contest >>> Anxious to hear other comments from other. >>> >>> David ND4Y >>> >>> >>> Sent from Mail for Windows 10 >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to [hidden email] >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [hidden email] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [hidden email] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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In reply to this post by Buck
On 3/31/2020 3:18 PM, Buck wrote:
> Why go halfway? I would go with the 1.8 as a roofing filter. I tried that and didn't like the result. I prefer 2.1 kHz 8 pole 73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email] |
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