Re: [Elecraft] sensitvity k4
Well K9FD, thank you for letting us know "what" you are. On 10/13/2020 20:20, K9FD wrote: Boy it fits the person asking the question. There are reams of files and court filings against Hir-onono for harassment when she ran or owned a company out here many moons back, she a dike as all the complaints were women. Of course everything was hidden and charges dropped a she was the Dems toy and upcoming politician. Probably knew Obozo well when he was here with the commie party. I think if you looked in her purse you would find her commie card. She is just the mouth of the party, they know shes to dumb for anything else, and just feed her the papers and what to say on demand. Remember the noise/gain equation and how what determines sensitivity is ultimately a systems noise figure. ... when used with a transverter or an EME preamp the noise figure of the system will essentially be set by the noise figure of the first stage. Subsequent stages have much less effect on the noise figure, as the noise contribution is divided by the gain of the preceding stage. On Tue, 13 Oct 2020 at 21:47, Richard Donner wrote: Wayne, Thank you. My main issue here is weak signals. There are no ham stations near me to cause interference. A good antenna is what I ought to have but that is not happening. Richard Richard Donner On Tue, Oct 13, 2020 at 12:56 PM Wayne Burdick wrote: Hi Richard, All K4 models utilize the same front-end circuitry (preamps, filters, etc.), so all will have virtually identical sensitivity for a given gain setting. These in turn will be similar to the K3/K3S. 73, Wayne N6KR On Oct 12, 2020, at 4:52 PM, Richard Donner wrote: Anyone have an idea which version of the k4 would have the most sensitivity for weak signals? Thanks Richard __ 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 ro...@redpoint.org.uk __ 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 merv.k...@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 ted.roycr...@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] sensitvity k4
We have also been apologetically notified by the poster that the email noted below was unintentionally sent in error to the Elecraft list. We gratefully accept their apology. This is a reminder to always be careful to check your email To: and cc: lists before hitting 'send'. Also note that since the list emails your postings directly to thousands of subscribers, there is no way for us to take them back or remove them. Also aggregators like Nabble independently gather list postings for their webpage and we do not have control over their operation. 73, Eric Moderator etc. elecraft.com _..._ > On Oct 13, 2020, at 5:44 PM, Eric Swartz wrote: > > Folks - The post below is in violation of the Elecraft list rules and is > totally inappropriate. > > Political and personal attacks are not allowed here. Period. > > Also, please do not reply to the posting person or comment further on the > post. > > Please, let's keep this list amateur radio related and polite. > > 73, > Eric > List moderator > elecraft.com > _..._ > >> On Oct 13, 2020, at 5:22 PM, merv wrote: >> Boy it fits the person asking the question. >> There are reams of files and court filings against... > __ 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] sensitvity k4
Folks - The post below is in violation of the Elecraft list rules and is totally inappropriate. Political and personal attacks are not allowed here. Period. Also, please do not reply to the posting person or comment further on the post. Please, let's keep this list amateur radio related and polite. 73, Eric List moderator elecraft.com _..._ > On Oct 13, 2020, at 5:22 PM, merv wrote: > > Boy it fits the person asking the question. > There are reams of files and court filings against... __ 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] sensitvity k4
Wrong list, just maybe? > On Oct 13, 2020, at 5:20 PM, K9FD wrote: > > Boy it fits the person asking the question. > There are reams of files and court filings against Hir-onono for harassment > when she ran or owned a company out here many moons back, she a dike > as all the complaints were women. Of course everything was hidden and > charges dropped a she was the Dems toy and upcoming politician. > Probably knew Obozo well when he was here with the commie party. > I think if you looked in her purse you would find her commie card. > > She is just the mouth of the party, they know shes to dumb for anything > else, and just feed her the papers and what to say on demand. > > >> Remember the noise/gain equation and how what determines sensitivity is >> ultimately a systems noise figure. ... when used with a transverter or an >> EME preamp the noise figure of the system will essentially be set by the >> noise figure of the first stage. Subsequent stages have much less effect >> on the noise figure, as the noise contribution is divided by the gain of >> the preceding stage. >> >> On Tue, 13 Oct 2020 at 21:47, Richard Donner wrote: __ 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] sensitvity k4
Boy it fits the person asking the question. There are reams of files and court filings against Hir-onono for harassment when she ran or owned a company out here many moons back, she a dike as all the complaints were women. Of course everything was hidden and charges dropped a she was the Dems toy and upcoming politician. Probably knew Obozo well when he was here with the commie party. I think if you looked in her purse you would find her commie card. She is just the mouth of the party, they know shes to dumb for anything else, and just feed her the papers and what to say on demand. Remember the noise/gain equation and how what determines sensitivity is ultimately a systems noise figure. ... when used with a transverter or an EME preamp the noise figure of the system will essentially be set by the noise figure of the first stage. Subsequent stages have much less effect on the noise figure, as the noise contribution is divided by the gain of the preceding stage. On Tue, 13 Oct 2020 at 21:47, Richard Donner wrote: Wayne, Thank you. My main issue here is weak signals.There are no ham stations near me to cause interference. A good antenna is what I ought to have but that is not happening. Richard Richard Donner On Tue, Oct 13, 2020 at 12:56 PM Wayne Burdick wrote: Hi Richard, All K4 models utilize the same front-end circuitry (preamps, filters, etc.), so all will have virtually identical sensitivity for a given gain setting. These in turn will be similar to the K3/K3S. 73, Wayne N6KR On Oct 12, 2020, at 4:52 PM, Richard Donner wrote: Anyone have an idea which version of the k4 would have the most sensitivity for weak signals? Thanks Richard __ 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 ro...@redpoint.org.uk __ 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 merv.k...@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] What is the maximum resolution supported by the K4 HDMI output?
Last January they said "Up to 4K" See http://elecraft.365791.n2.nabble.com/K4-Internal-and-External-display-resolution-connector-td7657770.html 73, Bob, N6TV On Tue, Oct 13, 2020 at 10:29 AM Michael Rosenberg < mikerosenb...@hotmail.com> wrote: > As in the title, what is the maximum screen resolution supported by the K4 > HDMI output? > > Thanks, > Mike > N9YB > __ > 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...@arrl.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] sensitvity k4
Remember the noise/gain equation and how what determines sensitivity is ultimately a systems noise figure. ... when used with a transverter or an EME preamp the noise figure of the system will essentially be set by the noise figure of the first stage. Subsequent stages have much less effect on the noise figure, as the noise contribution is divided by the gain of the preceding stage. On Tue, 13 Oct 2020 at 21:47, Richard Donner wrote: > Wayne, > Thank you. > My main issue here is weak signals.There are no > ham stations near me to cause interference. > > A good antenna is what I ought to have but that is not happening. > Richard > Richard Donner > > On Tue, Oct 13, 2020 at 12:56 PM Wayne Burdick wrote: > > > Hi Richard, > > > > All K4 models utilize the same front-end circuitry (preamps, filters, > > etc.), so all will have virtually identical sensitivity for a given gain > > setting. These in turn will be similar to the K3/K3S. > > > > 73, > > Wayne > > N6KR > > > > > On Oct 12, 2020, at 4:52 PM, Richard Donner > > wrote: > > > > > > Anyone have an idea which version of the k4 would have the most > > sensitivity > > > for weak signals? > > > Thanks Richard > > > > > > > __ > 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 ro...@redpoint.org.uk > __ 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] sensitvity k4
Wayne, Thank you. My main issue here is weak signals.There are no ham stations near me to cause interference. A good antenna is what I ought to have but that is not happening. Richard Richard Donner On Tue, Oct 13, 2020 at 12:56 PM Wayne Burdick wrote: > Hi Richard, > > All K4 models utilize the same front-end circuitry (preamps, filters, > etc.), so all will have virtually identical sensitivity for a given gain > setting. These in turn will be similar to the K3/K3S. > > 73, > Wayne > N6KR > > > On Oct 12, 2020, at 4:52 PM, Richard Donner > wrote: > > > > Anyone have an idea which version of the k4 would have the most > sensitivity > > for weak signals? > > Thanks Richard > > > __ 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] sensitvity k4
Hi Richard, All K4 models utilize the same front-end circuitry (preamps, filters, etc.), so all will have virtually identical sensitivity for a given gain setting. These in turn will be similar to the K3/K3S. 73, Wayne N6KR > On Oct 12, 2020, at 4:52 PM, Richard Donner wrote: > > Anyone have an idea which version of the k4 would have the most sensitivity > for weak signals? > Thanks Richard __ 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] [K3] Issue with HI CUR on 12m
Hi Jim, The SimSmith model includes Fair-Rite complex permeability files, which is the basis of the Ferrite model. John KN5L On 10/13/20 2:23 PM, Jim Brown wrote: > On 10/13/2020 11:41 AM, John Oppenheimer wrote: >> Jim, can you be more specific with flaws within the SimSmith model? > > John, I suggest that you study my email and the references I cited. Also > study the early pages in the Fair-Rite catalog, one devoted to each > material, showing plots of mu' and mu'' vs frequency. > > 73, Jim K9YC __ 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] K-Pod
As far as I can tell, no. I operate with headphones, and never hear the tones. Tom Sent from my iPad > On Oct 13, 2020, at 2:06 PM, Bill DeVore wrote: > > The K-Pod manual says that an annunciator in the K-Pod produces a brief > audible tone whenever switches F1 thru F8 are pressed. This does not happen > with my K-Pod and I suspect it is my hearing rather than a defect in the > K-Pod. Is there anyway to increase the volume of the annunciator? > > Bill - W3PNM > __ > 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 w...@mac.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 Headphones Q
I also use a QC-35. When plugged in with a cord, the power must be on for the noise cancelling to work. That also turns on the DSP which greatly improves audio quality. ED / W2RF -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Gary Smith Sent: Tuesday, October 13, 2020 2:01 PM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] K4 Headphones Q Jim, I only use my Bose QC-35 when: 1. on the cell phone. 2. mowing the yard/tuning my motorcycle 3. whenever using the K3 & K3s. The noise cancelling works perfectly with the blower from the Alpha 77SX right next to me, I only hear what is coming in from the radio. Why your QC-35 does not noise cancel when attached via cord is not normal, mine is a Godsend. 73, Gary KA1J > > I have Bose QC-35 headphones. Noise canceling does not work on any > radio when you use the cord. Headphones work well with a Bluetooth > connection.What kind of device do I use, if and when my K4 is > delivered?Also on the K4 can a USB port expander be used on the K4 > with multiple devices and what is the K4 limited to?Jim K9TFSent from > my T-Mobile 4G LTE Device > __ > 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 > g...@ka1j.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 e...@qrv.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] [K3] Issue with HI CUR on 12m
On 10/13/2020 11:41 AM, John Oppenheimer wrote: Jim, can you be more specific with flaws within the SimSmith model? John, I suggest that you study my email and the references I cited. Also study the early pages in the Fair-Rite catalog, one devoted to each material, showing plots of mu' and mu'' vs frequency. 73, Jim K9YC __ 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] [K3] Issue with HI CUR on 12m
Jim, can you be more specific with flaws within the SimSmith model? I've updated https://www.kn5l.net/Balun-CM/Balun31-43/ with Balun CMRR window image. So that others don't need to load SimSmith and model from the ZIP file link. John KN5L On 10/13/20 12:45 PM, Jim Brown wrote: > you clearly don't understand how > ferrite common mode chokes work. __ 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] K-Pod
The K-Pod manual says that an annunciator in the K-Pod produces a brief audible tone whenever switches F1 thru F8 are pressed. This does not happen with my K-Pod and I suspect it is my hearing rather than a defect in the K-Pod. Is there anyway to increase the volume of the annunciator? Bill - W3PNM __ 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 Headphones Q
Jim, I only use my Bose QC-35 when: 1. on the cell phone. 2. mowing the yard/tuning my motorcycle 3. whenever using the K3 & K3s. The noise cancelling works perfectly with the blower from the Alpha 77SX right next to me, I only hear what is coming in from the radio. Why your QC-35 does not noise cancel when attached via cord is not normal, mine is a Godsend. 73, Gary KA1J > > I have Bose QC-35 headphones. Noise canceling does not work on any > radio when you use the cord. Headphones work well with a Bluetooth > connection.What kind of device do I use, if and when my K4 is > delivered?Also on the K4 can a USB port expander be used on the K4 > with multiple devices and what is the K4 limited to?Jim K9TFSent > from my T-Mobile 4G LTE Device > __ > 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 g...@ka1j.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] [K3] Issue with HI CUR on 12m
On 10/13/2020 8:12 AM, John Oppenheimer wrote: Hi Jim, For high power Balun Applications, most critical parameter is Ferrite core loss which causes core heating. Core loss, parallel resistance (Rp), can be computed from complex permeability data from Fair-Rite. Hi John, While I respect your engineering chops, you clearly don't understand how ferrite common mode chokes work. They DEPEND on the loss component coupled from the ferrite core, which has a broad peak around resonance of the winding. Fair-Rite's #31 material is MnZn, which exhibits two resonances. One is formed by the inductance of the winding and the capacitance between turns; the second is a dimensional resonance that results from standing waves within the core. #43 material is NiZn; these materials do NOT exhibit dimensional resonance, because loss is low at the frequencies where it would occur. At HF, the two resonances in multi-turn chokes on #31 cores combine to provide a much broader resonance, comparable to what happened in stagger-tuned IFs. This has two implications. First, the broader resonance allows the choke to cover more bands. Second, and more important, ferrite cores have wide manufacturing tolerances that cause the resonances to shift in frequency. The broader impedance curve formed by chokes on #31 material allows a designer to specify chokes that will work within a specified frequency range with that tolerance variation; it is NOT possible with the much narrower impedance curve of chokes wound on #43 or #52 material. My "choke cookbook" is the result of first characterizing nearly 200 #31 cores of a given size, selecting cores at the tolerance limits for each size, winding and measuring more than a thousand chokes on these "limits" cores. The cookbook is based on chokes working with all of those "limits" cores. After seeing recommendations from a ham in the UK for #52 material, I bought 40 of these cores over a period of about four weeks, splitting the order between four franchised vendors (that is, ten from each vendor). I characterized those cores, selected cores at limits, and wound chokes using that ham's recommendations. I could not reproduce his results -- the tolerance variation moved their resonance away from their intended operating range. I learned about dimensional resonance from a classic engineering book on ferrite applications by E. C. Snelling that a colleague found for me in the engineering library of the U of Chicago, where he was on faculty. Snelling's work is considered "the bible" by engineers working in mfg and application of ferrites. It's reference 7 in the AES paper, and is also referenced in the tutorial. These concepts are discussed in detail in an AES paper from 2005 and in a tutorial I wrote for hams in 2007, the latter updated several times over the years. http://k9yc.com/AESPaperFerritesASGWeb.pdf http://k9yc.com/RFI-Ham.pdf The "cookbook" is here. http://k9yc.com/2018Cookbook.pdf 73, Jim K9YC __ 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] What is the maximum resolution supported by the K4 HDMI output?
As in the title, what is the maximum screen resolution supported by the K4 HDMI output? Thanks, Mike N9YB __ 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] AM RX Filter Selection issue
Added 6K Filter (required for AM transmit), been through filter configuration. Configuration for AM RX is desired for ability to select either 6K or 2.8K with WIDTH control. Filter selection of 2.8K does not occur with 2.8K width threshold. OK in SSB and DATA RX. Known issue? Ben W4SC 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: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] [K3] Issue with HI CUR on 12m
Hi Jim, For high power Balun Applications, most critical parameter is Ferrite core loss which causes core heating. Core loss, parallel resistance (Rp), can be computed from complex permeability data from Fair-Rite. https://www.kn5l.net/Balun-CM/Balun31-43/ Models FT240 10T with 31 and 43 materials. G.Zo is selected to indicate maximum possible core dissipation watts. Maximum core dissipation accrues when ground to antenna external conductor electrical length = 1/2 wavelength multiples. 1/2 wavelength multiples reflects ground impedance to the Balun. As shown, at 1.8MHz, maximum core dissipation for 1kW key down could be 4W for 31 material and 3.6W for #43 material. Probably not enough difference to worry about. The two CMRR traces, red and yellow, are below about -20dB. Difference in choking ability is insignificant in this range. The model includes a parallel capacitor for self resonance. Though is not critical, as reactance does not result in heating. Core loss, Rp, causes core heat rise. All in all, not much difference between 43 and 31 for these two Baluns. John KN5L On 10/12/20 9:05 PM, Jim Brown wrote: > #43 is a terrible material for the HF > bands. __ 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] [K3] Issue with HI CUR on 12m
This happened to me on a multi-band antenna, with SWR changing, but no Hi Cur warning. I would be transmitting for months, using only 100W with no issues. I added in a KPA500/KAT500 combination and apart from a short test at 400W, I continued to use it at 200W (SSB) max. After a month or so, the SWR would change - mid QSO. A quick retune and I was able to continue. Over a few weeks the occurrence was more frequent. Using a Rig Expert analyser, no fault or bad SWR was indicated and I (wrongly) guessed that the 400W Guanella balun was breaking down at power over 100W. In the meantime I ordered a new 1KW balun made for that antenna, but before it arrived, during a QSO there was a catastrophic "occurrence" with all kinds of warnings and the SWR was off the scale. A check with a multimeter indicated a dead short somewhere in the feedline (RG58). I also took the balun apart and found no fault. As I'd ordered a new balun, I decided to change it anyway. I don't have the power to exceed the new balun's spec, so it should last forever - RF wise. ;-) Obviously I replaced the co-ax feeder - I now use Westflex 103 with much larger ferrites (to fit the new cable size) as a common mode choke. All now works as it should and shows no sign of breakdown, even at 400W (max legal for the UK). The old co-ax is a different matter. With both ends disconnected (open) connecting one end to the analyser showed a short circuit about 15 feet along its length. I cut out a section either side and the remaining two pieces showed 'open' as they should. On visual inspection I find that the braid of the co-ax has migrated through the center insulation and is touching the inner conductor, indicating that a fair amount of heat has been generated. The area in question was right where the common mode ferrites had been fitted, although there were no tell-tale marks on the ferrites or the outer casing of the co-ax. It's fairly obvious that a high voltage node has caused an internal flashover which in turn has changed the characteristic which has resulted in a high current node which has generated the heat. You may well be right that your balun is not faulty, but you should check it anyway as well as checking out all the other aspects of the installation. If you can, replace the feeder. You may be surprised at what you find. 73, Alan. G4GNX -- Original Message -- From: "Bill Coleman" To: "Don Wilhelm" Cc: "Elecraft" Sent: 13/10/2020 01:55:16 Subject: Re: [Elecraft] [K3] Issue with HI CUR on 12m SWR on the problem antenna is below 1.2:1. It’s a trap dipole - designed for that band. It is unlikely the balun is “breaking down”. It’s a current balun - #43 ferrite beads on RG-313 coax. It can easily handle a kW or more. On Oct 12, 2020, at 2:12 AM, Don Wilhelm wrote: Bill, I would suggest that you check the SWR on the antenna before concluding it is an RF feedback problem. Don't forget that the balun may be breaking down with power and show no problem at lower power (like from an antenna analyzer). Don W3FPR On 10/11/2020 8:53 PM, Bill Coleman wrote: Don, I finally got around to running my K3 into a dummy load. I had no problem running 100w or even 110w with a dummy load. Current draw from the power supply was 22 A and 23 A, respectively, on the K3 display. No HI CUR indications. External wattmeter validates the output. I was getting the HI CUR indication on a trap 30/17/12m inverted V. I had to take it down, and now I’m using a trap 80/40/20m dipole through the tuner. No HI CUR indication on that antenna, either. Even though I have current baluns on both antennas, I’m thinking that my HI CUR problem may be related to RF feedback in the shack. Do you concur? I’m in the process of a number of shack improvements, including antenna replacements and grounding and bonding, so that might take care of it. On Jan 11, 2020, at 11:29 AM, Don Wilhelm wrote: Bill, Is this into a dummy load (bypass the ATU or tune the ATU into the dummy load). If it is into an antenna, there are a whole lot of guesses about how the antenna behaves with higher power levels than your antenna analyzer shows. So check it with a dummy load to eliminate the possibility that the problem is in the antenna. Put an external wattmeter in line with the dummy load to eliminate questions about the calibration on the K3 wattmeter. If you can measure the actual current drawn, that would also be helpful. 73, Don W3FPR On 1/11/2020 11:18 AM, Bill Coleman wrote: Back in early December, I installed two KSYN3As in my K3 SN 7071. Sometime after that, I noticed that on 12m, I’m seeing a HI CUR indication when I set the power level to more than about 80-85 watts. The K3 will back off on the power level, then slowly ramp back up until it hits HI CUR again. I don’t remember seeing this before. After the KSYNC3A install, I ran the transmit gain calibration at both 5 and 50 watts,
Re: [Elecraft] K4 replacement?
Alan, so sorry to hear about that. I am keeping fingers crossed to recover from that horrible situation. It is good to know that you with GF are safe and thinks positive. Many thanks for your great job in Elecraft! best 73, STAY SAFE! Petr, OK1RP - 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] Eric's presentation at RSGB Convention 2020
Tnx all and tnx Eric...great presentation. Richard *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU, J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV *Be joyful in hope, patient in affliction, faithful in prayer* On Tue, Oct 13, 2020 at 5:55 AM WI6X wrote: > Here is the link to the video > RSGB Convention Online > https://youtu.be/Zg7G_rhqNIc > > Jim WI6X > > On Oct 13, 2020, at 05:51, Jay Rutherford wrote: > > It's on youtube. Try a search on RSGB 2020 convention and it should be > the first one that pops up. Eric's presentation begins a few minutes into > the video, so click ahead about 18 minutes. > > 73 > Jay K3BH > > On Tue, Oct 13, 2020, at 08:39, Richard Zalewski wrote: > > Just where on the page is Eric's presentation? > > Tnx > > > Richard > > *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU, > J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV > > > **Be joyful in hope, patient in affliction, faithful in prayer** > > > > On Mon, Oct 12, 2020 at 6:23 AM Jay Rutherford wrote: > > I just watched this and appreciated hearing about the company's early and > developmental history. I bought K2/10 #1034 in early 2000 and built it > over 4 long evenings. I still have it, along with both KX radios. > > > 73 > > Jay K3BH > > > On Sat, Oct 10, 2020, at 06:23, KC0G via Elecraft wrote: > > Eric, WA6HHQ, gave the keynote address on the history of Elecraft at > > the RSGB online convention earlier this morning. > > __ > > 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 dick.w...@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 wi6x...@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] KPA500 REMOTE POWER CONTROL
Bob, That is a great plugnplay line of boxes you make!. Commendations to you for your inventiveness and marketing. However, I am not a 'plugnplay' ham and needed to figure out how I could wire something up myself. We talked early on in 2017 when I was first putting together my remote rig system and you had all the solutions for connecting up any combination of assorted shack necessities. But I I am not running a K3, I'm running a Kenwood TS-480 and feeding a KPA500/ KAT500. So I used a microbit webswitch to perform the shorting of pins 8+12 on the KPA to turn it on and off http://www.remoterig.com/wp/?page_id=166 The microbit 1216 is a great little box with five relays. I use the other four relays for a fan in the 'radio box' power to the KAT500 and a pair of coax relays. webswitch has not missed a beat in three years. Some photos and hookup on my projects page: http://www.valhallatreefarm.com/WB7ELY/newprojects.htm 73 Dave WB7ELYY > n 10/12/2020 10:59 PM Bob Wilson, N6TV wrote: > > > KPA500 AUX Pin 12 is GND. AUX Pin 8 is the KPA500 remote power ON/OFF > pin. No webswitch is necessary to remotely power the KPA500 on and off, > since this can be done quite easily from a button on the K3 itself, using a > macro, as described here: > > https://www.kkn.net/~n6tv/Y-BOX/Features.html#Remote > > 73, > Bob, N6TV > https://bit.ly/Y-BOX > > On Sat, Oct 10, 2020, 7:36 AM DAVID INGEBRIGHT < davein...@comcast.net > mailto:davein...@comcast.net > wrote: > > > > HI Gordon-- I run a KPA 500 remotely and have the same problem > some times. But there's a big green bar at the bottom of the utility that sez > "power on". That should be your first indication. But its hard to know what's > going on at the remote site. I use a 'remote rig' setup to run the radio and > the COM1 port to talk to the KPA 500 and for power on and off I use a set of > contacts from a microbit webswitch to toggle a short across pin 12 on the ACC > plug on the back of the KPA --and that's the same as pushing the power > button. The webswitch is very reliable and I use if for other stuff like > switching a fan in the transceiver box, KAT500 power and a couple of coax > relays. Here's a webpage with some of the info: > http://www.valhallatreefarm.com/WB7ELY/kpa500/kpa500.htm > > //dave > > WB7ELY > > > > > > > > > > > > > > OERTOEWE > > > > > __ 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] sensitvity k4
>From my experience with other SDR radios, the individual receivers in the K4D >won't give it a sensitivity advantage unless they are used in diversity mode. >In that case the K4D will have a clear advantage. ED / W2RF -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Joe Subich, W4TV Sent: Monday, October 12, 2020 8:50 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] sensitvity k4 On 2020-10-12 8:22 PM, Don Wilhelm wrote: > In general, the local noise will mask anything lower than -135dBm. That may be true for the lower HF bands. However, on 6 meters or when using the K4 as an IF for VHF transverters and/or EME the noise level will be as much as 20 dB less than -135 dBm. That may even be true with directional antennas above 20 MHz at suburban locations. 73, ... Joe, W4TV On 2020-10-12 8:22 PM, Don Wilhelm wrote: > Richard, > > I don't know the answer, but when you get receiver sensitivities > better the -135dBm, the exact sensitivity numbers do not mean much > unless you have an extremely quiet location. > In general, the local noise will mask anything lower than -135dBm. > I expect all K4s models to have better then -135dBm sensitivity. > > 73, > Don W3FPR > > On 10/12/2020 7:52 PM, Richard Donner wrote: >> Anyone have an idea which version of the k4 would have the most >> sensitivity for weak signals? >> Thanks Richard > __ > 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 > li...@subich.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 e...@qrv.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] Differences Between K4 Models
I am in the same boat as you. My primary interest is e-commerce and public service. The k3 works well for me. I want to see significant improvement in receiver and sound quality. I am waiting for the k4 to get out and be reviewed. Sent from my Verizon, Samsung Galaxy smartphone Original message From: weave...@usermail.com Date: 10/13/20 5:31 AM (GMT-08:00) To: Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] Differences Between K4 Models On the Elecraft website select products from the top menu. Then select K4. On that page there is a Models tab. That describes the differences in each model. 73, Bill WE5P Comfortably Numb > On Oct 13, 2020, at 06:20, Mister Mike wrote: > > Can anybody please tell me what are the differences between the K4-F, K4D-F > and the K4HD? I looked on the web site and I was unable to find a > comparison chart or anything more than purchasing information. > > I currently have a K3 with many of the options, including the sub-receiver. > I am just curious what the K4 has to offer me. Is there some comparison > chart somewhere to show what the advantages are for me to buy a newer K4? I > am sure others would like to know too. > > Than again, I am not an avid DXer or rabid contester. I have been licensed > for over 50 years and my operating patterns are pretty casual. > > 73, > > Michael, W1RC > Marblehead Massachusetts. > __ > 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 weave...@usermail.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 gthorn...@thorntonmostullaw.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] Eric's presentation at RSGB Convention 2020
Here is the link to the video RSGB Convention Online https://youtu.be/Zg7G_rhqNIc Jim WI6X > On Oct 13, 2020, at 05:51, Jay Rutherford wrote: > > It's on youtube. Try a search on RSGB 2020 convention and it should be the > first one that pops up. Eric's presentation begins a few minutes into the > video, so click ahead about 18 minutes. > > 73 > Jay K3BH > >> On Tue, Oct 13, 2020, at 08:39, Richard Zalewski wrote: >> Just where on the page is Eric's presentation? >> Tnx >> >> Richard >> *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU, >> J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV >> >> **Be joyful in hope, patient in affliction, faithful in prayer** >> >> >>> On Mon, Oct 12, 2020 at 6:23 AM Jay Rutherford wrote: >>> I just watched this and appreciated hearing about the company's early and >>> developmental history. I bought K2/10 #1034 in early 2000 and built it >>> over 4 long evenings. I still have it, along with both KX radios. >>> >>> 73 >>> Jay K3BH >>> >>> On Sat, Oct 10, 2020, at 06:23, KC0G via Elecraft wrote: Eric, WA6HHQ, gave the keynote address on the history of Elecraft at the RSGB online convention earlier this morning. >>> __ >>> 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 dick.w...@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 wi6x...@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] Eric's presentation at RSGB Convention 2020
https://youtu.be/AWwhSbLv0B8 Bil WE5P Comfortably Numb > On Oct 13, 2020, at 08:41, Richard Zalewski wrote: > > Just where on the page is Eric's presentation? > Tnx > > Richard > *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU, > J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV > > > *Be joyful in hope, patient in affliction, faithful in prayer* > > >> On Mon, Oct 12, 2020 at 6:23 AM Jay Rutherford wrote: >> >> I just watched this and appreciated hearing about the company's early and >> developmental history. I bought K2/10 #1034 in early 2000 and built it >> over 4 long evenings. I still have it, along with both KX radios. >> >> 73 >> Jay K3BH >> >>> On Sat, Oct 10, 2020, at 06:23, KC0G via Elecraft wrote: >>> Eric, WA6HHQ, gave the keynote address on the history of Elecraft at >>> the RSGB online convention earlier this morning. >> __ >> 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 dick.w...@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 weave...@usermail.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] Eric's presentation at RSGB Convention 2020
It's on youtube. Try a search on RSGB 2020 convention and it should be the first one that pops up. Eric's presentation begins a few minutes into the video, so click ahead about 18 minutes. 73 Jay K3BH On Tue, Oct 13, 2020, at 08:39, Richard Zalewski wrote: > Just where on the page is Eric's presentation? > Tnx > > Richard > *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU, > J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV > > **Be joyful in hope, patient in affliction, faithful in prayer** > > > On Mon, Oct 12, 2020 at 6:23 AM Jay Rutherford wrote: >> I just watched this and appreciated hearing about the company's early and >> developmental history. I bought K2/10 #1034 in early 2000 and built it over >> 4 long evenings. I still have it, along with both KX radios. >> >> 73 >> Jay K3BH >> >> On Sat, Oct 10, 2020, at 06:23, KC0G via Elecraft wrote: >> > Eric, WA6HHQ, gave the keynote address on the history of Elecraft at >> > the RSGB online convention earlier this morning. >> __ >> 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 dick.w...@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] Eric's presentation at RSGB Convention 2020
Just where on the page is Eric's presentation? Tnx Richard *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU, J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV *Be joyful in hope, patient in affliction, faithful in prayer* On Mon, Oct 12, 2020 at 6:23 AM Jay Rutherford wrote: > I just watched this and appreciated hearing about the company's early and > developmental history. I bought K2/10 #1034 in early 2000 and built it > over 4 long evenings. I still have it, along with both KX radios. > > 73 > Jay K3BH > > On Sat, Oct 10, 2020, at 06:23, KC0G via Elecraft wrote: > > Eric, WA6HHQ, gave the keynote address on the history of Elecraft at > > the RSGB online convention earlier this morning. > __ > 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 dick.w...@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] Differences Between K4 Models
On the Elecraft website select products from the top menu. Then select K4. On that page there is a Models tab. That describes the differences in each model. 73, Bill WE5P Comfortably Numb > On Oct 13, 2020, at 06:20, Mister Mike wrote: > > Can anybody please tell me what are the differences between the K4-F, K4D-F > and the K4HD? I looked on the web site and I was unable to find a > comparison chart or anything more than purchasing information. > > I currently have a K3 with many of the options, including the sub-receiver. > I am just curious what the K4 has to offer me. Is there some comparison > chart somewhere to show what the advantages are for me to buy a newer K4? I > am sure others would like to know too. > > Than again, I am not an avid DXer or rabid contester. I have been licensed > for over 50 years and my operating patterns are pretty casual. > > 73, > > Michael, W1RC > Marblehead Massachusetts. > __ > 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 weave...@usermail.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] [K3] Wetting current and CW paddles
I, too, live in NH. We still get super cold periods, despite the general warming trend. My impression, stemming from growing up here in the 50s, and comparing to current weather, is that we are developing some unusual (for us) patterns. We have hotter summers and higher humidity, but less actual rain, resulting in the contradiction of sweltering summers accompanied by drought. Winters are milder, temperature-wise, but there is more precip over the winter months, much of it rain, and we now have longer periods of sub-0F weather...or so my heating bill seems to suggest. Ironically, we are faced with spring floods and summer droughts. There is another alternative that I am considering that has its parallel in keyers. I am considering installing super caps. The difference is that I'd install the caps to provide an initial starter punch on those super cold days, whereas I'd install the caps on my keys to punch through oxide layers. The effect derives from the same source: the ability of the cap to provide a pulse of current in a short time. On 2020-10-13 07:21:-0400, Michael Stone wrote: >Back in the old days when the weather was colder than it is now, I was living >in New Hampshire. I didn’t have a garage for my car. There is a trick that >someone told me about that apparently works when you know that the vehicle >might not turn over fast enough and start on a below zero morning. Turn the >headlights on for several seconds to less than a minute to create a bit of >heat in the battery that in turns gets the chemical reaction going. This >sometimes helps�or appears to help. My choice of insuring that the engine >started was to remove the battery and bring it into the house and then >reinstall it just before starting the engine. Lots of extra work, but I was >never late for work due to cold weather. >Mike, N1VE __ 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 replacement?
Tom, be patient, it pays off ! - 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] [K3] Wetting current and CW paddles
Very informative , important info Thanks 73 Andy HB9CVQ -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Rich NE1EE Sent: Dienstag, 13. Oktober 2020 13:08 To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Wetting current and CW paddles On 2020-10-13 00:54:-0700, dl2ki wrote: >Hi, >i found this very interesting article by Hjalmar, OZ1JHM http://www.oz1jhm.dk/content/wetting-current-and-cw-paddles I have an amusing story along these lines. Coming home one night from a late date with my wife, we came upon a car stalled at a light. It was perhaps 22-2300. I got out to see what I might do. The car would not start. The usual clicking from the starter, usually indicating a dead battery. Short version. I asked the other driver to turn on the radio. It worked. I then asked them to turn the headlamps. They worked. After a bit of additional troubleshooting, during which I did nothing to the car, I suggested they turn on the headlamps and attempt to start the car. It started. Arriving home, my wife promptly challenged me, saying that common practice is to turn off all electrics to preserve battery charge, and then attempt to start the car. I told her that the battery was fine, and I opined as time passed that there was possibly too much corrosion on the terminals. When the starter circuit engaged, it didn't draw enough current to move the solenoid fully. By turning on the headlamps, which are a large resistive load, a current path was generated through the oxidation. Then the starter was able to draw enough current to fully engage the solenoid. Of course, this may have been a fortunate coincidence. ;-) __ 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 hb9...@hispeed.ch __ 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] [K3] Wetting current and CW paddles
On 2020-10-13 00:54:-0700, dl2ki wrote: >Hi, >i found this very interesting article by Hjalmar, OZ1JHM http://www.oz1jhm.dk/content/wetting-current-and-cw-paddles I have an amusing story along these lines. Coming home one night from a late date with my wife, we came upon a car stalled at a light. It was perhaps 22-2300. I got out to see what I might do. The car would not start. The usual clicking from the starter, usually indicating a dead battery. Short version. I asked the other driver to turn on the radio. It worked. I then asked them to turn the headlamps. They worked. After a bit of additional troubleshooting, during which I did nothing to the car, I suggested they turn on the headlamps and attempt to start the car. It started. Arriving home, my wife promptly challenged me, saying that common practice is to turn off all electrics to preserve battery charge, and then attempt to start the car. I told her that the battery was fine, and I opined as time passed that there was possibly too much corrosion on the terminals. When the starter circuit engaged, it didn't draw enough current to move the solenoid fully. By turning on the headlamps, which are a large resistive load, a current path was generated through the oxidation. Then the starter was able to draw enough current to fully engage the solenoid. Of course, this may have been a fortunate coincidence. ;-) __ 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] Differences Between K4 Models
Can anybody please tell me what are the differences between the K4-F, K4D-F and the K4HD? I looked on the web site and I was unable to find a comparison chart or anything more than purchasing information. I currently have a K3 with many of the options, including the sub-receiver. I am just curious what the K4 has to offer me. Is there some comparison chart somewhere to show what the advantages are for me to buy a newer K4? I am sure others would like to know too. Than again, I am not an avid DXer or rabid contester. I have been licensed for over 50 years and my operating patterns are pretty casual. 73, Michael, W1RC Marblehead Massachusetts. __ 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] [K3] Wetting current and CW paddles
Hi, i found this very interesting article by Hjalmar, OZ1JHM With my Elecraft transceivers I have measured the following values: K3: 4.97 V, 0.105 mA -> 0.52 mW, 47.3 Ohm K2: 5.62 V, 0.670 mA -> 3.70 mW, 8.5 Ohm It seems that the effect described by Hjalmar would also apply to my K3. Does anyone have any insights into this? Is there already a modification for the K3 to increase the keyer current? Especially with fast CW speeds and the associated short contact times, the problem may already be known with some OM's. In any case, Hjalmar's article is very interesting and invites to observe the described effect. 73, Wolfgang DL2KI -- 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
