Re: [Elecraft] Dual Receiver Tricks
Some words are being misunderstood and mis-used. Polarization describes the geometric orientation of the antenna and the resulting EM field. Polarity is the positive or negative going sense of voltage or current in a circuit (what for decades we mistakenly called "in phase/out of phase). Polarity has two values, positive or reverse. We change the polarity by turning the wires over in a circuit. Phase is a continuously valued function and is measured in degrees or radians. The phase relationship between two signals has meaning only for sine waves of the same frequency. The phase relationship between antennas is a function of the distance between them, the frequency of each signal they transmit or receive. Further, this phase relationship is different for every angle from which a signal arrives or to which it is transmitted. The phase relationship also includes the electrical lengths of the transmission lines involved, and, of course, the difference in phase increases in proportion to the frequency of the signal. There's a tutorial discussion of these concepts in http://k9yc.com/VE3DO.pdf in the context of how the DX Engineering NCC-1 and NCC-2 work to steer the directivity of two spaced antennas. The same laws of physics are at play in this discussion. 73, Jim K9YC On 6/26/2019 9:20 PM, Edward R Cole wrote: I feed signals from two antenna that are orthogonally polarized (one is horz and other is Vert polarity, both pointed in the same direction and essentially in-phase). I use the eme sw MAP-65 to process the output of both Rx and it resolves the angle of polarization and maxes signal strength in alignment with the actual angle of polarity. __ 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] Dual Receiver Tricks
Dave AB7E, I have been doing something similar with my K3 with subRx: I feed signals from two antenna that are orthogonally polarized (one is horz and other is Vert polarity, both pointed in the same direction and essentially in-phase). I use the eme sw MAP-65 to process the output of both Rx and it resolves the angle of polarization and maxes signal strength in alignment with the actual angle of polarity. There is another sw called Linrad that can do that for two signals (written in Linux). http://www.sm5bsz.com/linuxdsp/linrad.htm MAP-65 is authored by Joe Taylor - K1JT who also created FT8 and FT4. You might contact Joe about your ideas and maybe he would be interested in creating the sw you want?? 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: dubus...@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] QRP FD KX2 Batteries & FT8 Report
Yes we were running about that rate on cw up here in Oregon. 4A 5w on our KX3s. Some of the visiting new hams had never seen real cw with a paddle (!) in action. We had 3 antennas-ZL special,2 element 40m wire beam and a rhombic switchable open/closed loop for either 20 or 80. They were all strung on a 550 ‘catenary ‘ line at about 75 feet between pine trees. I love holding a frequency with 5W :). And-no interference between the KX3s-not so the other brands that occasionally showed up. Call W7LT Dan Presley 503-701-3871 danpresley@me. com n7...@arrl.net > On Jun 25, 2019, at 08:28, Wayne Burdick wrote: > > Meanwhile, some CW stations were running contacts at a rate of several per > minute. With no automation :) > > Wayne > N6KR > > >> On Jun 25, 2019, at 8:25 AM, Carl Jón Denbow wrote: >> >> Peter, >> >> I am curious how you got FT8 to do the proper FD exchange? I read a post >> where some hams were discussing this and it sounded very difficult and >> complex, so I decided against trying it. One guy actually had two FT8 >> programs running simultaneously, with one connected to HRD, which somehow >> enabled him to do the proper exchange. His description made absolutely no >> sense to me, so though I’m an experienced FT8 op, I decided to forgo FT8 for >> this FD. I’m curious how you accomplished this feat! >> >> 73, >> >> Carl >> >> Sent from my iPhone >> === >> Carl Jón Denbow, N8VZ >> 17 Coventry Lane >> Athens, Ohio 45701-3718 >> >> c...@n8vz.com >> www.n8vz.com >> EM89wh >> >> IRLP 4533 Echolink 116070 >> >> PSK and JT65 Forever! >> === >> >>> On Jun 25, 2019, at 9:37 AM, Peter West wrote: >>> >>> When our club’s plans for FD fell through at the last minute I set up 1B >>> with my trusty KX-2 with a Bioenno battery and two internal KX2 battery >>> pacs on my back porch. Got a Par 40-20-10 end-fed up about 40’ in a >>> north-south orientation only to find band conditions here were pretty bad >>> here in the north with QRN, QSB and faint signals at best. So switched to >>> FT-8. I was forced to run QRP (which isn’t an issue as I am primarily a QRP >>> contester anyway) as anything over 5 watts caused the rig to overheat to >>> the point of automatically reducing power to 5 watts. Had WSJT, JT Alerts >>> and even N1MM all cooperating and auto logging so all I had to do was stop >>> reading the newspaper and occasionally glance over to the computer to see >>> if I had worked anybody since the last time I clicked on a callsign. Then I >>> started to notice my setup wasn’t completing a lot of calls which I had >>> initiated. I started to pay more attention to the screen and discovered >>> that it appeared to me that my signal was getting swamped out by QRO (100 >>> watts or more on FD) signals which I couldn’t readily detect. At a >>> suggestion from the FT8 FB group switched on the hold-my-transmit-frequency >>> button. On CW my rates aren’t much different from QRP to 100 watts as I’m >>> only 2 S-units down and aggressive operating skills can compensate for a >>> lot of differences in power and I can deal with QRM I can hear and see. Not >>> so on FT-8. I am rebuilding my contest station and only have the end-fed >>> and an HF-2 vertical up right now and know that better results on QRP are >>> largely antenna and location dependent (oh to live on a saltwater marsh). >>> Running FT8 with the KX-2 on FD was an education and I’ve got to do some >>> thinking about how to improve my chances if I decide to try this again. All >>> in all great fun with some learning but can’t wait for more future >>> propagation. Maybe I should by the Elecraft amp LOL. >>> __ >>> 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...@qth.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...@elecraft.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 n7...@arrl.net __ Elecraft mailing list Home:
Re: [Elecraft] All knobs at max ...
As was explained very carefully to us last fall before the election with that proposal, it would take a change in an international agreement for CA to go on full-time DST, so don’t hold your breath. Now, it that wasn’t true, it definitely wouldn’t be the first time the Sacramento politicians lied to us here. Not even first time in that election. 73! Jack, W6FB > On Jun 26, 2019, at 7:41 PM, Phil Kane wrote: > > On 6/24/2019 2:45 PM, Wes wrote: >> I actually removed them from my estate plan after getting to much grief >> some years ago from the FD guru at headquarters after I simply asked >> that the schedule also list the times in GMT. I'm in AZ. We know that >> you can't actually save daylight by tweaking your clock, so we don't. >> ARRL publishes the zone times as if everyone reset their clock and they >> are so parochial to not even mention DST on the column headings. I've >> missed FMTs for similar reasons. >> > Gonna be lots of fun when the three West Coast states go on "full time > summer time" (which the FCC wisely called "Advanced Time" in licensing > schedules for AM stations because no one could find where the Daylight > was being stored). Then we will have WA, OR, CA, and AZ on GMT-7 > year round, the rest of the Mountain Time Zone on GMT-7/GMT-6, and the > Pacific Time Zone will be only a memory because nobody will be on GMT-8 > - at least in the USA, that is. I don't know what Canada and Mexico > will do. Don't need a degree in engineering, an accounting degree will > do. I thought that year-round GMT-8 made more sense for the Pacific > Time Zone, but no one asked me. What the heck, they're only numbers on > a clock. > > > 73 de K2ASP - Phil Kane > Elecraft K2/100 s/n 5402 > > From a Clearing in the Silicon Forest > Beaverton (Washington County) Oregon > __ > 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 jackbrin...@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 arch...@mail-archive.com
Re: [Elecraft] All knobs at max ...
On 6/24/2019 2:45 PM, Wes wrote: > I actually removed them from my estate plan after getting to much grief > some years ago from the FD guru at headquarters after I simply asked > that the schedule also list the times in GMT. I'm in AZ. We know that > you can't actually save daylight by tweaking your clock, so we don't. > ARRL publishes the zone times as if everyone reset their clock and they > are so parochial to not even mention DST on the column headings. I've > missed FMTs for similar reasons. > Gonna be lots of fun when the three West Coast states go on "full time summer time" (which the FCC wisely called "Advanced Time" in licensing schedules for AM stations because no one could find where the Daylight was being stored). Then we will have WA, OR, CA, and AZ on GMT-7 year round, the rest of the Mountain Time Zone on GMT-7/GMT-6, and the Pacific Time Zone will be only a memory because nobody will be on GMT-8 - at least in the USA, that is. I don't know what Canada and Mexico will do. Don't need a degree in engineering, an accounting degree will do. I thought that year-round GMT-8 made more sense for the Pacific Time Zone, but no one asked me. What the heck, they're only numbers on a clock. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ 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
I have a fully provisioned K3 with some of the K3s upgrades. I have the P3 with transmit sensor and SVGA additions. A few years ago I had it serviced and everything is working nicely. By now I am comfortable with operation and I have figured out how to tune things up for maximum performance. I even have a Rose Kopp K3 bag embroidered with my call sign. The biggest criticism I have heard of the K3 has to do with the quality of the audio. The K3 rig is a bit shrill and harsh compared to some other rigs I have heard. I have a nice pair of Sounds Sweet speakers (alas no longer made) that solves that issue for me. I have looked at the K4 materials on line and I understand the multiple advances this rig will offer. If I went for it I would go for the full HD version. I want the maximum possible advantage in a contest situation. But to spend 5 grand plus I would need to see some improvement in performance to justify the substantial additional expense. That includes receiver performance as well as advances in DSP and noise reductio I am going to hold off on ordering until I see some test reports and evaluations. I will probably order next year after the kit option becomes available. __ 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 Ergonomics etc
Very good review and information Doug. Thanks for taking the time to do it. I too will be ordering a K4, probably in the second production run. I may wait until the super het version is available. Alan K7FH > On Jun 26, 2019, at 11:01 AM, Doug Turnbull wrote: > > Dear OMs and YLs, > I had a chance to see the new K4 at Friedrichshafen.It was like > visiting flowers with bees swarming to have a go.I am impressed and have > a few points perhaps not mentioned previously. > > 1) Ergonomics: > > a) The Main tuning know is raised and has clustered directly around it > certain LEDS and Switches of particular use in tuning. > > LEDS are TX, Delta Freq, SUB (RX), and DIV for diversity.Having "Delta > Freq" directly adjacent to the tuning know may help me remember to stay off > a DX frequency. > > Switches are Freq Ent, Scan, Lock A/B and Sub/Div. Positioning these > switches right at the main tuning know seems to me an improvement over the > K3/S. > > b) Having the Spectrum display directly in front and on the radio itself yet > also giving a good size for the spectrum display is also to my liking. > > c) Because the spectrum display is built in, the radio is not as wide as a > K3 and P3 combination.The HDMI port still allows me to have a 24 inch > monitor for the frequency display so the slightly smaller display will not > cause me difficulties. > > d) A built in P3 should reduce the number of external cables. > > e) The tactile feel of the switches has been improved. > > 2) Economy, Many accessories of the past are built in. > > a) No need for a DVK CW, voice recorder card as this function is built in. > Ery good b) No need for a more stable oscillator as this too is built in.ry > c) No need for a wide band filter to allow general coverage because if you > switch out the superhet front end, you already have a general coverage RX. > Eric confirmed that the Superhet front end can be bypassed. > d) No need for a 4 kHz filter for FT8 as you can just switch out the > superhet front end.FT8 is normally not a mode used in contesting so > should be pretty robust without the superhet front end. > e) No separate P3 > f) No need for an accessory board in the K3 to enable an external monitor. > > 3) Ease of installing updates for diversity and also superhet front end; I > understand that it will no longer be necessary to unplug the front control > panel in order to install these options.This was always a bit of a > worrying moment for me though I have assembled three K3 radios and removed > the front panels on a number of occasions for updates such as installing the > DVK. I am an old goat with shaky enough hands and deteriorating eyesight. > > I should go through the specs to compare total weights of a fully equipped > K3 and P3 combination to the fully equipped K4. This data is probably not > yet available. How will the power consumptions compare? It will be > interesting to see the full specifications and Sherwood test results. No > matter, my plans are to purchase in the next twelve months. I like the > Elecraft philosophy of keeping the radio relatively small, light and most > importantly allowing for future enhancement. > > Agreed you will work anything with the K3 that you can work with the K4. > Most likely the 7300 will work 99.9% of what the K3 works but a VW Beetle > will do what a Porsche does but just maybe not with the same style. > >73 Doug EI2CN > PS Sadly there will be no Fred Cady, KE7X book this time to further inform. > > __ > 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 acorb...@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 Ergonomics etc
Dear OMs and YLs, I had a chance to see the new K4 at Friedrichshafen.It was like visiting flowers with bees swarming to have a go.I am impressed and have a few points perhaps not mentioned previously. 1) Ergonomics: a) The Main tuning know is raised and has clustered directly around it certain LEDS and Switches of particular use in tuning. LEDS are TX, Delta Freq, SUB (RX), and DIV for diversity.Having "Delta Freq" directly adjacent to the tuning know may help me remember to stay off a DX frequency. Switches are Freq Ent, Scan, Lock A/B and Sub/Div. Positioning these switches right at the main tuning know seems to me an improvement over the K3/S. b) Having the Spectrum display directly in front and on the radio itself yet also giving a good size for the spectrum display is also to my liking. c) Because the spectrum display is built in, the radio is not as wide as a K3 and P3 combination.The HDMI port still allows me to have a 24 inch monitor for the frequency display so the slightly smaller display will not cause me difficulties. d) A built in P3 should reduce the number of external cables. e) The tactile feel of the switches has been improved. 2) Economy, Many accessories of the past are built in. a) No need for a DVK CW, voice recorder card as this function is built in. b) No need for a more stable oscillator as this too is built in. c) No need for a wide band filter to allow general coverage because if you switch out the superhet front end, you already have a general coverage RX. Eric confirmed that the Superhet front end can be bypassed. d) No need for a 4 kHz filter for FT8 as you can just switch out the superhet front end.FT8 is normally not a mode used in contesting so should be pretty robust without the superhet front end. e) No separate P3 f) No need for an accessory board in the K3 to enable an external monitor. 3) Ease of installing updates for diversity and also superhet front end; I understand that it will no longer be necessary to unplug the front control panel in order to install these options.This was always a bit of a worrying moment for me though I have assembled three K3 radios and removed the front panels on a number of occasions for updates such as installing the DVK. I am an old goat with shaky enough hands and deteriorating eyesight. I should go through the specs to compare total weights of a fully equipped K3 and P3 combination to the fully equipped K4. This data is probably not yet available. How will the power consumptions compare? It will be interesting to see the full specifications and Sherwood test results. No matter, my plans are to purchase in the next twelve months. I like the Elecraft philosophy of keeping the radio relatively small, light and most importantly allowing for future enhancement. Agreed you will work anything with the K3 that you can work with the K4. Most likely the 7300 will work 99.9% of what the K3 works but a VW Beetle will do what a Porsche does but just maybe not with the same style. 73 Doug EI2CN PS Sadly there will be no Fred Cady, KE7X book this time to further inform. __ 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] QRP FD KX2 Batteries and FT8 Report - reply
Thanks to all who took the time to suggested a different category for me on FD but I was 1B - battery operating in my backyard with the KX-2 running 5 watts and not using my regular station in the basement. The antenna for the day (end-fed 40-20-10) was set up on the Saturday and the only AC power was used to power the logging computer although I could get around that too if I was so inclined. I even drove in a new ground rod. Sorry if I wasn’t clear enough. Several requests about how I got WSJT-X, JT-Alerts, and N1MM working with the KX-2 I’ve answered directly but essentially whenever I have software issues I just reinstall everything and follow online videos or posts about what to switch on and what to switch off. Generally this works fine sooner or later. (Can’t wait to try setting up RTTY on my Flex 6600!) BTW I’ve decided that the best way to contest using a weak-signal mode like FT-8 is to run at least a 100 watts into a big antenna at the proper height. A kilowatt would ensure success. 73 Peter - VE3HG __ 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] QRP FD KX2 Batteries & FT8 Report
Bob, I'm curious how you got the RC version to work during Field Day weekend; did you fake the date? -- 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
