Re: [Elecraft] ESSB and the 6 kHz Filter
David, Yes, you need the 6kHz filter for ESSB. The 2.8kHz filter will strip it down to 2.8kHz. 73, Don W3FPR On 1/29/2016 8:07 PM, David Ahrendts wrote: Am I correct that you do not achieve 4.0 kHz ESSB (widest TX with the K3S) without selecting the 6.0 kHz crystal filter for SSB TX? Just want your affirmation. :—) __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] ESSB and the 6 kHz Filter
On Fri, Jan 29, 2016 at 8:40 PM, Bob McGraw K4TAXwrote: > > Receive BW on AM will go to 5.0 kHz and on SSB 4.0 kHz. > Unlike AM, receive bandwidth will never go to 4KHz in ssb. For some unknown reason, the receive bandwdith in ssb is restricted to about 3300Hz. My weekend project proving this point is visible at http://k3s.wikidot.com 73, Barry N1EU > > 73 > Bob, K4TAX > > On 1/29/2016 7:07 PM, David Ahrendts wrote: > >> Am I correct that you do not achieve 4.0 kHz ESSB (widest TX with the >> K3S) without selecting the 6.0 kHz crystal filter for SSB TX? Just want >> your affirmation. :—) >> >> David A. KK6DA, LA >> >> >> >> David Ahrendts davidahren...@me.com >> >> >> >> >> __ >> 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 >> Message delivered to rmcg...@blomand.net >> > > > __ > 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 > Message delivered to n1eu.ba...@gmail.com > __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] ESSB and the 6 kHz Filter
I'll look into this later today. 73, Wayne N6KR On Feb 1, 2016, at 5:43 AM, Barry N1EUwrote: > On Fri, Jan 29, 2016 at 8:40 PM, Bob McGraw K4TAX > wrote: > >> >> Receive BW on AM will go to 5.0 kHz and on SSB 4.0 kHz. >> > > Unlike AM, receive bandwidth will never go to 4KHz in ssb. For some > unknown reason, the receive bandwdith in ssb is restricted to about > 3300Hz. My weekend project proving this point is visible at > http://k3s.wikidot.com > > 73, Barry N1EU __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] ESSB and the 6 kHz Filter
Using the K3 Utility, in checking the Filter Config list, while I do have the 6.0 kHz filter installed, I must select the 2.7 kHz or 2.8 kHz for CW and SSB transmit. Then from the CONFIG menu ESSB I can select up to 4.0 kHz bandwidth. Receive BW on AM will go to 5.0 kHz and on SSB 4.0 kHz. 73 Bob, K4TAX On 1/29/2016 7:07 PM, David Ahrendts wrote: Am I correct that you do not achieve 4.0 kHz ESSB (widest TX with the K3S) without selecting the 6.0 kHz crystal filter for SSB TX? Just want your affirmation. :—) David A. KK6DA, LA David Ahrendts davidahren...@me.com __ 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 Message delivered to rmcg...@blomand.net __ 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] ESSB and the 6 kHz Filter
On 1/29/2016 8:40 PM, Bob McGraw K4TAX wrote: Using the K3 Utility, in checking the Filter Config list, while I do have the 6.0 kHz filter installed, I must select the 2.7 kHz or 2.8 kHz for CW and SSB transmit. > > Then from the CONFIG menu ESSB I can select up to 4.0 kHz bandwidth. The K3 and K3S use the AM TX filter for ESSB wider than 2.8 KHz. Receive BW on AM will go to 5.0 kHz and on SSB 4.0 kHz. Receive audio bandwidth will never go beyond 4.2 KHz as there is a fixed, audio lowpass filter following the digital to analog converter. In any case, the true audio bandwidth is FC +/- BW/2 for all modes. Even in AM the maximum value for BW is 4.00 (4 KHz) representing a recovered audio bandwidth of 0 - 4000 Hz or 200 - 4200 Hz. If FC (shift) is lower than 2.00, the actual bandwidth will be less than 4 KHz even when BW = 4.00 due to the formula above (FC +/- BW/2). 73, ... Joe, W4TV __ 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 Message delivered to arch...@mail-archive.com