Re: [Elecraft] K4 model v. K3S for strong nearby signal rejection.
We run two stations, both K3, P3, KPA500, KAT500, with antennas two FEET apart for county expeditions. See k9yc.com/7QP.pdf and http://k9yc.com/Multi-Station.pdf 73, Jim K9YC On 11/1/2019 6:16 PM, K9ZTV wrote: Notice he said 50 YARDS, not feet. 73, Kent K9ZTV On Nov 1, 2019, at 10:48 AM, Bob McGraw K4TAX wrote: We used K3S radios at a Field Day site. Operated 2 radios on the same band with antennas less than 50 yards apart. __ 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 j...@audiosystemsgroup.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] K4 model v. K3S for strong nearby signal rejection.
Notice he said 50 YARDS, not feet. 73, Kent K9ZTV > On Nov 1, 2019, at 10:48 AM, Bob McGraw K4TAX wrote: > > We used K3S radios at a Field Day site. Operated 2 radios on the same band > with antennas less than 50 yards apart. __ 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] K4 model v. K3S for strong nearby signal rejection.
The way it has been described, you only need to turn it on when you need it … so you can run the radio as a straight SDR or a hybrid SDR, switchable on the fly. Whether or not doing so changes the volume … ??? The bandwidth (and audio levels) is set by the SDR processes in both cases, so it would be a reasonable assumption that it wouldn’t change, and the hybrid module would switch in the appropriate roofing filter automatically. Wild guesses, of course. But not unreasonable :-) Grant NQ5T > On Nov 1, 2019, at 4:09 PM, wrote: > > I believe that using a roofing filter that is about as narrow as the overall > receive bandwidth can have a detrimental effect on ssb voice quality as well > as on digital mode reception. Will the K4HD have a single button way to > remove the superhet part so that receive quality can be easily compared > without change of overall bandwidth and volume? > > 7 __ 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] K4 model v. K3S for strong nearby signal rejection.
I believe that using a roofing filter that is about as narrow as the overall receive bandwidth can have a detrimental effect on ssb voice quality as well as on digital mode reception. Will the K4HD have a single button way to remove the superhet part so that receive quality can be easily compared without change of overall bandwidth and volume? 73, Erik K7TV -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Joe Subich, W4TV Sent: Friday, November 01, 2019 12:34 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K4 model v. K3S for strong nearby signal rejection. On 2019-11-01 11:56 AM, Bill W4ZV wrote: > Thanks Joe! From those BWs I assume both are 5-poles. I can't recall seeing any comment of 5 pole vs 6 pole vs 8 pole. Wayne did say that any of the K3/K3s filters would work (and I assume, be available as options). I don't see any value in "narrow" versions of the standard bandwidths as the ADC being used in the K4 will have several dB of dynamic range above and beyond that of the K3/K3S. As a SWAG - if there are indeed three slots - I would consider 6 KHz - data modes (JT65/FT8/FT4/etc.), AM and ESSB, 2.8 KHz - SSB and general purpose RTTY, and 500 Hz - CW and high performance RTTY. 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 ebasil...@cox.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] K4 model v. K3S for strong nearby signal rejection.
On 2019-11-01 11:56 AM, Bill W4ZV wrote: Thanks Joe! From those BWs I assume both are 5-poles. I can't recall seeing any comment of 5 pole vs 6 pole vs 8 pole. Wayne did say that any of the K3/K3s filters would work (and I assume, be available as options). I don't see any value in "narrow" versions of the standard bandwidths as the ADC being used in the K4 will have several dB of dynamic range above and beyond that of the K3/K3S. As a SWAG - if there are indeed three slots - I would consider 6 KHz - data modes (JT65/FT8/FT4/etc.), AM and ESSB, 2.8 KHz - SSB and general purpose RTTY, and 500 Hz - CW and high performance RTTY. 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
Re: [Elecraft] K4 model v. K3S for strong nearby signal rejection.
Thanks Joe! From those BWs I assume both are 5-poles. BTW has anyone ever compared the old 5-pole 200 to the newer 6-pole? 73, Bill W4ZV -- Sent from: http://elecraft.365791.n2.nabble.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] K4 model v. K3S for strong nearby signal rejection.
We used K3S radios at a Field Day site. Operated 2 radios on the same band with antennas less than 50 yards apart. No issues. Just be sure you use the ATTN and set the RF Gain correctly <
Re: [Elecraft] K4 model v. K3S for strong nearby signal rejection.
Each K4HD superhet receive section includes two crystal filters: one SSB/data bandwidth, one CW bandwidth. There are 5 filter positions per K3S and per KRX3A... 73 - Petr - 73 - Petr, OK1RP "Apple & Elecraft freak" B:http://ok1rp.blogspot.com MeWe: https://bit.ly/2HGPoDx MeWe: https://bit.ly/2FmwvDt -- Sent from: http://elecraft.365791.n2.nabble.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] K4 model v. K3S for strong nearby signal rejection.
On 2019-11-01 9:20 AM, j...@kk9a.com wrote: > I use most of my K3S roofing filter slots, many slots are in the K4HD? I believe Wayne indicated there were three slots. 73, ... Joe, W4TV On 2019-11-01 9:20 AM, j...@kk9a.com wrote: I use most of my K3S roofing filter slots, many slots are in the K4HD? I'm sorry to see that the K3S will become silent key, it has been a perfect radio for my portable and home contest operations. John KK9A __ 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] K4 model v. K3S for strong nearby signal rejection.
Per a previous posting by Wayne ... the same filters (2.7 KHz and 500 Hz) as the K3/K3s. 73, ... Joe, W4TV On 2019-11-01 9:04 AM, Bill W4ZV wrote: Does anyone exactly what BW the filters are in the K4HD? __ 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] K4 model v. K3S for strong nearby signal rejection.
I use most of my K3S roofing filter slots, many slots are in the K4HD? I'm sorry to see that the K3S will become silent key, it has been a perfect radio for my portable and home contest operations. John KK9A Petr, OK1RP/M0SIS wrote: Dear Eric, there is no reason to expect far better results from K4HD compare to K3S as it is quite similar FE design in that matter. K4HD has just superhet module w/xtals roofing filters added to standard direct sampling K4/K4D radio. K3S has more filters slots available... So the results should be adequate as Wayne and Eric several times expressed already. 2c, Petr __ 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] K4 model v. K3S for strong nearby signal rejection.
Does anyone exactly what BW the filters are in the K4HD? -- Sent from: http://elecraft.365791.n2.nabble.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] K4 model v. K3S for strong nearby signal rejection.
Dear Eric, there is no reason to expect far better results from K4HD compare to K3S as it is quite similar FE design in that matter. K4HD has just superhet module w/xtals roofing filters added to standard direct sampling K4/K4D radio. K3S has more filters slots available... So the results should be adequate as Wayne and Eric several times expressed already. 2c, Petr - 73 - Petr, OK1RP "Apple & Elecraft freak" B:http://ok1rp.blogspot.com MeWe: https://bit.ly/2HGPoDx MeWe: https://bit.ly/2FmwvDt -- Sent from: http://elecraft.365791.n2.nabble.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] K4 model v. K3S for strong nearby signal rejection.
That is what the K4 FAQ says: K4HD is equivalent to a K3S. 73, Drew AF2Z On 11/01/19 00:34, Bill Breeden wrote: I asked a similar question at the Elecraft K4 Forum at the Huntsville Hamfest this year and came away with the impression that the K4HD would be required to meet or exceed the performance of the K3/K3s in this regard. Since Eric, Wa6HHQ presented the forum and answered my question, he can correct me if I came away with the wrong impression. 73, Bill - NA5DX On 10/31/2019 9:58 PM, Eric Norris wrote: This doesn't answer my question. Is the K4HD required to provide nearby signal blocking equal to or better than the K3s? There is no statement like this in the FAQ, nor any technical specs. I'm sure Elecraft has run these tests, and I hope they'll share them, or at least give us some idea of the relative performance of the various K4 models compared to the K3S as regards to nearby signal rejection. 73 Eric WD6DBM On Thu, Oct 31, 2019, 3:47 PM Nr4c wrote: Read the FAQ. The K4HD is a K4D with a superheat front end with roofing filters added in front of the ADCs. Like adding a K3 in front of the SDR. Sent from my iPhone ...nr4c. bill On Oct 31, 2019, at 6:12 PM, Tox wrote: K4hd (is a k4(d?) With additional filters) On Thu, Oct 31, 2019, 2:52 PM eric norris via Elecraft < elecraft@mailman.qth.net> wrote: Can somebody tell me which of the K4 models will produce better blocking of extremely strong (S9+20 to S9+40) nearby in frequency signals than a K3S? Is this blocking gain compression? I'm trying to plan a future station upgrade and I have ham neighbors. 73. Eric WD6DBM Sent from Yahoo Mail on Android __ 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 breede...@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 pu...@af2z.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] K4 model v. K3S for strong nearby signal rejection.
I asked a similar question at the Elecraft K4 Forum at the Huntsville Hamfest this year and came away with the impression that the K4HD would be required to meet or exceed the performance of the K3/K3s in this regard. Since Eric, Wa6HHQ presented the forum and answered my question, he can correct me if I came away with the wrong impression. 73, Bill - NA5DX On 10/31/2019 9:58 PM, Eric Norris wrote: This doesn't answer my question. Is the K4HD required to provide nearby signal blocking equal to or better than the K3s? There is no statement like this in the FAQ, nor any technical specs. I'm sure Elecraft has run these tests, and I hope they'll share them, or at least give us some idea of the relative performance of the various K4 models compared to the K3S as regards to nearby signal rejection. 73 Eric WD6DBM On Thu, Oct 31, 2019, 3:47 PM Nr4c wrote: Read the FAQ. The K4HD is a K4D with a superheat front end with roofing filters added in front of the ADCs. Like adding a K3 in front of the SDR. Sent from my iPhone ...nr4c. bill On Oct 31, 2019, at 6:12 PM, Tox wrote: K4hd (is a k4(d?) With additional filters) On Thu, Oct 31, 2019, 2:52 PM eric norris via Elecraft < elecraft@mailman.qth.net> wrote: Can somebody tell me which of the K4 models will produce better blocking of extremely strong (S9+20 to S9+40) nearby in frequency signals than a K3S? Is this blocking gain compression? I'm trying to plan a future station upgrade and I have ham neighbors. 73. Eric WD6DBM Sent from Yahoo Mail on Android __ 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 breede...@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] K4 model v. K3S for strong nearby signal rejection.
This doesn't answer my question. Is the K4HD required to provide nearby signal blocking equal to or better than the K3s? There is no statement like this in the FAQ, nor any technical specs. I'm sure Elecraft has run these tests, and I hope they'll share them, or at least give us some idea of the relative performance of the various K4 models compared to the K3S as regards to nearby signal rejection. 73 Eric WD6DBM On Thu, Oct 31, 2019, 3:47 PM Nr4c wrote: > Read the FAQ. The K4HD is a K4D with a superheat front end with roofing > filters added in front of the ADCs. Like adding a K3 in front of the SDR. > > Sent from my iPhone > ...nr4c. bill > > > > On Oct 31, 2019, at 6:12 PM, Tox wrote: > > > > K4hd (is a k4(d?) With additional filters) > > > >> On Thu, Oct 31, 2019, 2:52 PM eric norris via Elecraft < > >> elecraft@mailman.qth.net> wrote: > >> > >> Can somebody tell me which of the K4 models will produce better blocking > >> of extremely strong (S9+20 to S9+40) nearby in frequency signals than a > >> K3S? Is this blocking gain compression? I'm trying to plan a future > >> station upgrade and I have ham neighbors. > >> 73. Eric WD6DBM > >> > >> Sent from Yahoo Mail on Android > > __ 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] K4 model v. K3S for strong nearby signal rejection.
Read the FAQ. The K4HD is a K4D with a superheat front end with roofing filters added in front of the ADCs. Like adding a K3 in front of the SDR. Sent from my iPhone ...nr4c. bill > On Oct 31, 2019, at 6:12 PM, Tox wrote: > > K4hd (is a k4(d?) With additional filters) > >> On Thu, Oct 31, 2019, 2:52 PM eric norris via Elecraft < >> elecraft@mailman.qth.net> wrote: >> >> Can somebody tell me which of the K4 models will produce better blocking >> of extremely strong (S9+20 to S9+40) nearby in frequency signals than a >> K3S? Is this blocking gain compression? I'm trying to plan a future >> station upgrade and I have ham neighbors. >> 73. Eric WD6DBM >> >> Sent from Yahoo Mail on Android >> __ >> 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 scott.sm...@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 n...@widomaker.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] K4 model v. K3S for strong nearby signal rejection.
K4hd (is a k4(d?) With additional filters) On Thu, Oct 31, 2019, 2:52 PM eric norris via Elecraft < elecraft@mailman.qth.net> wrote: > Can somebody tell me which of the K4 models will produce better blocking > of extremely strong (S9+20 to S9+40) nearby in frequency signals than a > K3S? Is this blocking gain compression? I'm trying to plan a future > station upgrade and I have ham neighbors. > 73. Eric WD6DBM > > Sent from Yahoo Mail on Android > __ > 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 scott.sm...@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
[Elecraft] K4 model v. K3S for strong nearby signal rejection.
Can somebody tell me which of the K4 models will produce better blocking of extremely strong (S9+20 to S9+40) nearby in frequency signals than a K3S? Is this blocking gain compression? I'm trying to plan a future station upgrade and I have ham neighbors. 73. Eric WD6DBM Sent from Yahoo Mail on Android __ 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
