[Elecraft] Seven postings about AX1 and antenna-tuners
Hello, This evening, I am giving a talk to new hams. Here are the very first comments they'll hear/see: 73 jerry km3x __ 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] KX3 manual page 14 regardincg "TUNE".
Please disregard my post as I have "re-found" the answer. Long story short...I started this activity some six months ago and had to stop for personal reasons. I had simply forgotten that Ray K2ULR had provided the answer back then. When I realized it, I tried to stop my post but Keith WE6R emailed me that there is no way to do that. Apologies for taking up the bandwidth. 88 jerry km3k > On 02/06/2023 11:36 AM Lee Hiers wrote: > > > CW = continuous wave, an unmodulated carrier > > CW <> Morse code, although many take it to mean that these days. One > doesn't "learn CW", one "learns Morse code". > > Do you have a watt meter between the KX3 and the loop? > > 73 de Lee, AA4GA > > > > > On Mon, Feb 6, 2023 at 11:14 AM JEROME SODUS mailto:jso...@comcast.net > wrote: > > > > Hello, > > > > My question is about the "TUNE" selection (half second hold of the > > XMIT button). > > > > The manual's wording is > > "TUNE is used to put out a CW signal at the power level selected by > > the __ PWR control.". > > > > Normally, "CW" means morse-code. > > But, in this instance, am I correct in thinking it stands for > > "continuous wave" or, in other words, an unmodulated FM signal (constant > > carrier and > > amplitude)? > > > > The reason for my email is > > I am setting up a Magnetic-Loop-Antenna that has a "remote tuning" > > capability and that "remote tuning" set-up is not going very well for me. > > If the KX3 is putting out a continuous wave, then there is a > > serious problem with the "remote tuning" box. > > > > TIA for any reply. > > 73 jerry km3k > > KX3 #6088 > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > 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 lee.hi...@gmail.com mailto:lee.hi...@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] KX3 manual page 14 regardincg "TUNE".
Hello, My question is about the "TUNE" selection (half second hold of the XMIT button). The manual's wording is "TUNE is used to put out a CW signal at the power level selected by the __ PWR control.". Normally, "CW" means morse-code. But, in this instance, am I correct in thinking it stands for "continuous wave" or, in other words, an unmodulated FM signal (constant carrier and amplitude)? The reason for my email is I am setting up a Magnetic-Loop-Antenna that has a "remote tuning" capability and that "remote tuning" set-up is not going very well for me. If the KX3 is putting out a continuous wave, then there is a serious problem with the "remote tuning" box. TIA for any reply. 73 jerry km3k KX3 #6088 __ 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] KX3 and its "TUNE" selection.
Hello, Yesterday, I was re-reading the KX3-manual to prepare for putting into use a magnetic-loop-antenna. The KX3 manual, on page 14, has this wording "TUNE is used to put out a CW signal at the power level selected by the PWR control.". This is new territory for me as I have never have used "TUNE" or "XMIT" button. Neither the manual nor the great book "The Elecraft KX3-Portable" by Fred KE7X (SK) have answers to my questions, which are: 1. From where does this CW signal come? 2. What information is in that CW signal? The concern I have is the CW signal will get out from my mag-loop-antenna into the "ether", so my call-sign needs to be there to satisfy the FCC. TIA for any assistance. 73 jerry km3k KX3#6088 __ 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] some positive operating features that the KX3 has
Hello, Next month, I have to give a talk about the KX3 to my club...South Mountain Radio Amateurs club. To prepare for that, I recently asked here for some information about the KX3's workings of the I/Q signal paths and am grateful for the replies received. During my presentation, I'd also like to talk about some positive operating features that the KX3 has for the modes CW, SSB, RTTY, FT8. If anybody would like to respond to me with comments in that regard, please do so to my email address... jso...@comcast.net mailto:jso...@comcast.net . That way, we'd reduce traffic here. TIA 73 jerry km3k KX3#6088 __ 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] I/Q details for the KX3.
Hello, Although I have asked some of these questions on another forum, here I have expanded on them a bit. When the KX3 transmits a CW-signal, are both I and Q used? If so, why would that be necessary? (My guess is only the I is needed.) Same questions too for a SSB-signal. But, for any digital transmission like RTTY, FT8, or Olivia, wouldn't both I and Q would be active? The LO is used for the "In Phase" and is delayed by 90 degrees for the "Quadrature"; how is that delay done? How much can the delay deviate from 90 degrees and still be useful? My reason for asking is that I'm to give a talk to the Radio Club in August about how a KX3 works and want to mention these details. TIA for any replies. 73 jerry km3kKX3#6088 __ 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] need readable kx3 block-diagram
Rob KG6HUM, That is much better (not perfect but sufficent for the purpose intended) and has more information too. I did not think to look there for a block-diagram. So thank-you for the help. 73 jerry km3k > On 05/02/2022 10:43 PM Rob Campbell wrote: > Jerome, > Does the one in the schematics not work for you? It's a PDF and let's me > zoom way in without pixelation. > > https://ftp.elecraft.com/KX3/Manuals%20Downloads/KX3SchematicDiagramDec2012.pdf > -- > Rob Campbell > KG6HUM > > > On Mon, May 2, 2022, 8:13 AM JEROME SODUS mailto:jso...@comcast.net > wrote: > > > > Hello, > > I'm scheduled to give, at the August meeting of the South Mountain > > Radio Amateurs club, a presentation on the workings of the Elecraft KX3. > > I need a readable copy of the KX3's block-diagram for my ppt. > > Making a copy of the block-diagram from the on-line manual and > > blowing it up to fit into a ppt does not work; the print inside the blocks > > are not at all readable. > > Googling for alternatives, I see "http://cqdx.ru " has a sharp copy > > but I have yet to figure a way to copy that into my ppt. > > So, hopefully someone somewhere has a sharp copy that they could > > send to me. > > TIA for any help. > > 73 jerry km3k.kx3#6088. > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > 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 kg6...@gmail.com mailto:kg6...@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] need readable kx3 block-diagram
Hello, I'm scheduled to give, at the August meeting of the South Mountain Radio Amateurs club, a presentation on the workings of the Elecraft KX3. I need a readable copy of the KX3's block-diagram for my ppt. Making a copy of the block-diagram from the on-line manual and blowing it up to fit into a ppt does not work; the print inside the blocks are not at all readable. Googling for alternatives, I see "cqdx.ru" has a sharp copy but I have yet to figure a way to copy that into my ppt. So, hopefully someone somewhere has a sharp copy that they could send to me. TIA for any help. 73 jerry km3k.kx3#6088. __ 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] KX3 to practice sending CW
I have it working. The fix was tapping "DISP" to have VFO-B display "frequency" rather than the several displays of time, supply-voltage, current-drain, etc. I'm noting Fred's book accordingly. 73 jerry km3k > On 08/15/2021 12:22 AM JEROME SODUS wrote: > > > Hello, > > For a CW-sending practice session, I'm having trouble setting up the KX3 > to decode my sending. > I know it can be done because I had it working a couple years ago by > following the page 71-72 directions in the book by Fred KE7X (SK) for the KX3. > I'm using the same directions again now. > > The mode is CW. > PTT was set. > I did have "RX THR3" showing. > The little "T" is in the lower-right corner. > I hear my sending. > But the VFO-B window shows the clock. > Having done the set-up several times with the same negative result, I > need to ask for help. > > 73 jerry km3k > __ 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] KX3 to practice sending CW
Hello, For a CW-sending practice session, I'm having trouble setting up the KX3 to decode my sending. I know it can be done because I had it working a couple years ago by following the page 71-72 directions in the book by Fred KE7X (SK) for the KX3. I'm using the same directions again now. The mode is CW. PTT was set. I did have "RX THR3" showing. The little "T" is in the lower-right corner. I hear my sending. But the VFO-B window shows the clock. Having done the set-up several times with the same negative result, I need to ask for help. 73 jerry km3k __ 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] OT: Metric system
Hello, Aren't we really sort of into the metric system already? In life now, we use these metric termsSeconds, Watts, Amperes, Volts, Liter (for wine, etc), Lumen (when deciding what light-bulb to buy). For temperature, it would not be terribly difficult to change to Celsius; people could adapt to that rather quickly. Weight might encounter some problem. As I see it, the most difficult transitions would be distance (length) and recipes. Just my opinion. 73 jerry km3k __ 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
[Elecraft] please disregard....Re: setting up DX-Lab for my kx3
Hello, Please disregard my yesterday's email. I fired up the system today and everything works, which is a surprise since no changes were made. I have no explanation for this right now but will attempt to see if the port was shut-off; Dave-AA6YQ cautions about that from time to time. I thought I had done that operation a long time ago but maybe all the MS-updates messed that up. Sorry to take up the bandwidth. 73 Jerry KM3K > On February 22, 2019 at 10:39 PM JEROME SODUS wrote: > > > Hello, > > I want to set-up DX-Lab for two radios, namely my Yaesu FT-950 and the > KX3. > > No problem with DX-Lab controlling the FT-950. > > (I do know that the KX3 has communicated with the KX3-Utility program > today, so that tells me the USB connection works.) > > But DX-Lab and the KX3 are not talking to each other, so here are my > settings for the KX3 in DX-Lab: > > Port7 > > Baud38400 > > Word8 > > ParityN > > Stop1 > > DTRN > > RTSY > > Also, in Device-Manager, flow-control is 'None'. > > Am I ok here or should I be looking elsewhere? > > TIA for any reply. > > 73 jerry km3k > > > __ 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
[Elecraft] setting up DX-Lab for my kx3
Hello, I want to set-up DX-Lab for two radios, namely my Yaesu FT-950 and the KX3. No problem with DX-Lab controlling the FT-950. (I do know that the KX3 has communicated with the KX3-Utility program today, so that tells me the USB connection works.) But DX-Lab and the KX3 are not talking to each other, so here are my settings for the KX3 in DX-Lab: Port7 Baud38400 Word8 ParityN Stop1 DTRN RTSY Also, in Device-Manager, flow-control is 'None'. Am I ok here or should I be looking elsewhere? TIA for any reply. 73 jerry km3k __ 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
[Elecraft] coaxial-cable patent# 1407 on 6apr1880.
Hello, Walter K6WRU has written, "I think we take coaxial cable for granted. It was a brilliant invention and a real gift to people who love radio. Maybe I?ll start celebrating December 8th as Coaxial Cable Day. https://www.wired.com/2009/12/1208coaxial-cable-patent/"; Well, Walter, perhaps April 6th may be a better date to celebrate because an English fellow, Oliver Heaviside, was granted patent# 1407 on 6-apr-1880 for a coaxial-cable. That's some 51 years earlier. We owe a debt of gratitude to Heaviside; some examples He developed the Transmission-Line theory; so important to hams. Hams, who are electronic-engineers, know about Maxwell's equations; in truth, they are Heaviside's equations and they are so elegant in their simplicity, having replaced twelve of Maxwell's twenty equations. Maxwell's were so complicated that Heaviside set them aside and developed his four from a different starting point. Heaviside predicted there must be, in the atmosphere, a conducting layer to let radio waves to follow the Earth's curvature. Heaviside coined words that we take for granted, some examplesinductance, impedance, permeability, permittivity, admittance, susceptance. Circuit-Analysis, that I used daily in my design work, was started by Heaviside. 73 Jerry KM3K __ 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] KX3-Utility worked in May but not now.
Hello, As the subject-line states, my records show that all was good this past May when I checked if I was up-to-date firmware-wise. Also, in September, for the power-up sequence, I successfully used the Utility to put in a banner with my call-sign. The idea today was to get DX-Lab and its WinWarbler connected to the KX3. I had read that the KX3's CW-decoding could be displayed in WinWarbler. But now, I have an issue and I'm not even out of the starting-gate. The Utility's tab "Firmware" shows that wheels are spinning in "Attempting to connect KX3 on port COM3 at " using various bit/s speeds. The KX3 is set at 4800 bits/s. So, I used Win10's trouble-shooting and got this message: The error I get is "Prolific USB-to-Serial Comm Port (COM8) has a driver problem." I'm mystified that I see COM3 in one place and COM8 in another. I have no idea what to do next. I was horrified to read that I had a Prolific USB adapter; so much bad press about Prolific. TIA for any help. 73 Jerry KM3K __ 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] searching for post by Wayne n6kr about counterpoise
Hello, I want to re-read a post that Wayne n6kr made about a wire-antenna tossed up a tree and the location of a counterpoise; this was relative to portable operating a kx2 or kx3, if I recall correctly. But my archive search has come up empty. My recollection is he recommended placing the counterpoise in a direction opposite to the wire-antenna. I need to verify that recollection. Hopefully someone has saved that post. TIA for any help. 73 Jerry km3k __ 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] Resistor and capacitor installation techniques: trim before or after soldering?
About Message#15 copied below Sorry but cutting wires after soldering is "bad practice"; NASA wanted the soldered connection left undisturbed. If I ever saw an assembler or tech doing that "bad practice", they'd get a verbal warning that first time and a written warning if it ever happened again; but I had good, conscientious people and never had to do that. So, tin the wires if needed; position the part and then trim wires before doing the final soldering. 73 Jerry KM3K Message: 15 Date: Sat, 24 Mar 2018 19:39:47 + From: Bill Johnson To: "ksto...@ac0h.net" , 'Mark Petrovic' , "Elecraft@mailman.qth.net" Subject: Re: [Elecraft] Resistor and capacitor installation techniques: trim before or after soldering? Message-ID: Content-Type: text/plain; charset="us-ascii" Follow the instructions and solder as directed. There are components on both sides as I recall with the majority on the top. The leads need be spread to hold the components in place on the board. Once done soldering use a flush cut wirecutter to remove the excess. Not a good idea to trim them before soldering. 72 & 73, Bill K9YEQ FT'er for K2, KX1, KX3, KXPA100, KAT500, W2, etc. __ 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] Hey hey what happened to my post?
Hello, The header of my posting is there but the message section is not. Elecraft digest, Volume164, issue 19 "10. kx3 and single-lever paddle (JEROME SODUS)" Please re-cycle it as I need to know what to do with my single lever paddle and the KX3. TNX 73 Jerry KM3K __ 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] kx3 and single-lever paddle
__ 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] kxpd3 question
Hello, I'm a "no-code-ham" determined to become a "know-code-ham" and so have signed up to a course by CWops. They require a paddle for sending practice since lessons will be done at 20-wpm. Having researched the topic of 'paddles' and from that effort, I think that a single paddle might work best for me. Here are the negative items which helped form that opinion: 1. a comment that regular practice is needed to maintain competence with a dual-paddle, 2. iambic-a or iambic-b just seem physically complicated. In reading my KX3-manual and Fred-KE7X's book, it seems to me that the KXPD3 is capable of only dual-paddle operating. Or have I missed something? I understand that my KX3 has a second port for an external key (I presume a single-paddle). In the past, I recall seeing photos of hams working KX3-portable with a straight-key but, at those times, I did not pay attention if any had a paddle. TIA for any reply. 73 Jerry KM3K __ 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] RM-11708 proposal to FCC threatens CW and digital modes
Hello, I bought a KX3 to induce me to learn the code and operate portable. Randal Evans, who is not a ham, wants RM-11708 approved, so he can use the ham-bands to download movies. Imagine that happening where I want to operate CW and PSK31. Here is Evans' message to the FCC sent in last week: "7521315143.txt To: FCC - RM-11708 The sailing forms are all engouraging us to file comments in support of RM-11708. This is my first filing and if I mess this up, please see SailNet Forum at: http://www.sailnet.com/forums/general-discussion-sailing-related/111746-us-c itizensurged-support-fcc-rm-11708-a.html I have experienced very dependable service from the amateur radio Internet Winlink system. Its a great service because all of the other available Internet services cost money. Even when I am topside crusing the system runs automatically below deck publishing my position reports and downloading my email. I use the system for sending position reports, ordering supplies, repairs, chatting with friends and posting to facebook. My only complaint is that it needs to be much faster. I am not a amateur radio operator yet but a friend lets me use his call with a SIDD on the end. I hope to get my own ham call soon. >From what I read on the sailing forums, RM-11708 will allow Winlink eMail to run twice as fast. That is great and I am for that. Some of the technical folks are saying that if RM-11708 is published with no bandwidth we can get even faster Internet and might be able to stream movies on the Winlink Internet. I'm for passing RM-11708 into law with no bandwdith limits." I sent to the FCC my notice that I don't want RM-11708. I don't want the ham-bands used for email and movies when commercial services can do that. 73 Jerry KM3K -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of jsdroys...@nc.rr.com Sent: Monday, June 23, 2014 9:14 AM To: elecraft@mailman.qth.net Subject: [Elecraft] RM-11708 proposal to FCC threatens CW and digital modes Perhaps others like me are unaware of this proposed FCC rule that would allow digital communication modes 2.8 kHz in width to be used robotically in the CW and data sub-bands without regard to interference. ARRL supports this and evidently initiated it. http://www.arrl.org/files/media/News/RM-11708%20Briefing%20Memo.pdf However, information on websites savecw.com and saveRTTY.com indicates it would cause grave interference with CW and narrow digital modes. There is evidently a short window of opportunity to submit comments to the FCC about this, and there are instructions on the noted websites for how to do this online within just a few minutes. If you google for RM-11708 you can read some well-reasoned comments submitted by other hams to the FCC electronic docket. I can't evaluate the claims being made about ARRL's motivation but it seems important not to allow such bad interference, so I submitted a comment. Julie KT4JR __ 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 jso...@comcast.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] temperature sensors and "convert" -- now off topic
Thank you for this; it is really funny. 73 Jerry KM3K -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bruce Beford Sent: Sunday, June 22, 2014 2:49 PM To: elecraft@mailman.qth.net Subject: [Elecraft] temperature sensors and "convert" -- now off topic 1 KPH= 1670.245764733954 furlongs/fortnight. 8) Bruce/N1RX -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Charlie T, K3ICH Sent: Sunday, June 22, 2014 2:06 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] temperature sensors and "convert" -- now off topic What is the conversion factor from "furlongs per fortnight" to KPH? Chas __ 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 jso...@comcast.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] Field Day tips
About #1 below and the wire in the tree with radials off the ground... I was instantly reminded about Al Brogdon W1AB and his "Killer Antenna". He wrote about it in 2006 in his ARRL book "Low Profile Amateur Radio" (Chapter 8 and also pages 44-48) and in QST-July1999. The "Killer Antenna" is something I've kept in mind ever since I bought the book seven years ago and is one of the reasons I bought a KX3, so I could try it out portable, something I cannot do on my postage-size lot. His portable results seemed impressive for an idea so simple; granted he was using a Kenwood TS-50. 73 Jerry KM3K -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown Sent: Tuesday, June 17, 2014 2:30 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Field Day tips On 6/16/2014 8:36 PM, Wayne Burdick wrote: > Here are our annual tips for getting the most out of your Elecraft rig at field day: I'll add some more tips about QRP on Field Day. I've done three QRP Field Days, and one of them our group won for 1A battery. The same group came in second when we tried 2A with a second station on SSB part time. 1) Use the most efficient antennas that you can. A wire thrown over a tree and a radial laying on the ground will get you on the air, but a resonant dipole high in those trees can easily be 3-6 dB better. And even more radials with that wire in the tree, and picking them up off the ground, will add a few dB to your signal. 2) Use the most efficient feedline that you can. If you're only putting out 5W, don't burn 2W in RG58. Use RG8, RG11, RG213. 3) Get your antennas as high as you can. On 80M, 10 ft more height for a dipole is worth about 1 dB, 5 ft for a 40M dipole. 4) Don't waste your time with SSB on FD. CW can be reasonably competitive QRP, and a lot of fun. SSB only be described as a struggle, and is definitely not fun. Been there, done that, burned the Tee shirt. :) The combination of #1, #2, and #3 can easily make a 10-15 dB difference in your signal. 13 dB is the difference between 5W and 100W. And here are some tips to help you avoid RF noise problems on Field Day. If you can't hear 'em, you can't work 'em. http://nccc.cc/pdf/CQP-RFI2013-2.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 jso...@comcast.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] [K3] Roofing filters are misunderstood
Thank-you, Greg. Excellent. Jerry KM3K _ From: Greg [mailto:a...@cablespeed.com] Sent: Monday, May 12, 2014 12:52 PM To: Jack Brindle Cc: Jerome Sodus; elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Roofing filters are misunderstood http://www.elecraft.com/K3/Roofing_Filters.htm On Mon, May 12, 2014 at 9:45 AM, Jack Brindle wrote: Jerry, Why do you say it has been corrupted? This is exactly the purpose for the Roofing Filters in the K3. Jack B, W6FB On May 12, 2014, at 9:33 AM, Jerome Sodus wrote: > Hello Bill, > The term "roofing-filter" made sense back in the 1980's when I designed > roofing-filters at 70 MHz. > Bandwidths would be in tens of KHz. > The purpose then was to protect downstream circuitry by rejecting very > strong out-of-band signals that could cause overload; selectivity was not > the purpose. > Selectivity was done further downstream. > So the term has become corrupted over the years. > 73 Jerry KM3K __ 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] Roofing filters are misunderstood
Hello Bill, The term "roofing-filter" made sense back in the 1980's when I designed roofing-filters at 70 MHz. Bandwidths would be in tens of KHz. The purpose then was to protect downstream circuitry by rejecting very strong out-of-band signals that could cause overload; selectivity was not the purpose. Selectivity was done further downstream. So the term has become corrupted over the years. 73 Jerry KM3K -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill Turner Sent: Monday, May 12, 2014 1:07 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Roofing filters are misunderstood ORIGINAL MESSAGE: (may be snipped) On 5/11/2014 7:25 PM, Fred Jensen wrote: > I too think roofing filters are really not well understood. REPLY: A large part of the misunderstanding is due to the name. Whoever chose the name "roofing" did a great disservice. A better name would simply be it's function: 1st I.F. filter. That's what it is and that's what it does. I have always thought that "roofing" was a marketing ploy to imbue it with some kind of magical powers. 73, Bill W6WRT __ 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 jso...@comcast.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] K3 Kit Wisdom
To be on the safe side, wear only cotton clothing; no wool or synthetic clothes. Cotton will be least likely to pick-up any charges. 73 Jerry KM3K KX3 #6088 -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Saturday, May 03, 2014 8:28 PM To: John, 9H5G; elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Kit Wisdom John, As for the advice about screwdrivers, yes, get yourself a quality, new #1 phillips. I like the ones from Ace Hardware with the blue handles (Pro Series), and I like the 8 inch length, just because I learned to use that length many, many years ago - pick whatever length you are comfortable with,but do buy a quality screwdriver from a reputable supplier - a bargain bin screwdriver tip is usually not cut with adequate precision. If you can see shiny spots on the corners of the tip, it is not adequate for the task, it will slip and strip your screwheads. My method of judging a phillips tip driver is if it does not hold a 3/16 inch phillips head screw when it is held horizontally, it is time for that screwdriver to be replaced. I take issue with the suggestion to use magnetic holders and the insert bits. I prefer not to have any magnetic tools at my electronics workbench, they attract stray bits of cutoff component leads and other things stick to the tools. YMMV on that one - take your pick. I use several magnetic holders to great benefit in the woodworking shop, but never at the electronics workbench. As for anti-static, yes take measures - a wrist strap is a minimum, if you have an anti-static mat at the workbench, work on that surface, especially when handling unmounted boards. Do NOT work on a completely conducting surface such as a bare metal desktop or cookie sheet, or aluminum foil or whatever - fully conductive surfaces can also create static damage when they contact that fully conductive surface and are a safety hazard if there are live power sources anywhere near. Newspapers misted with a spray of water in addition to the wrist strap can be more effective than a fully conducting surface. If you have no other alternative, cut open one of the black anti-static bags that the boards are packed in, connect it to a 1 megohm resistor with a clip lead, and ground the far end of the 1 megohm resistor to the center screw on an AC receptacle cover plate (your wrist strap can ground to the same place). As has been said about the egg cartons, stay away from most plastic containers for sorting because plastics and foam stuff attracts a static charge. If you need to sort the hardware into the various sizes, use metal tins (Altoids tins?) or paper cups. If you are adept at spotting a screw size and length 'by eye', you can just dump all the hardware into a large box and pick the right ones from there. Those having long term experience with woodworking measurements or metalworking will have that ability. Make such judgements based on what you know about your abilities. 73, Don W3FPR On 5/3/2014 3:51 PM, John, 9H5G wrote: > Gentlemen, > > Thank you for a fantastic list of hints and tips so far! > > As Gary, KI4GGX, pointed out I should have mentioned the options that I have coming. It's a K3/100 with a KRX3 and a handful of filters. Simple but very effective, I'm sure. > > __ 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 jso...@comcast.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] KX3 & Chasing local HF noise sources
Mike W0MU gave a good beginning, only there is more to the story. (I gave a class on RFI this past February to our club, so the topic is still fresh in my mind.) There may be devices in your house or on your grounds that are battery-operated, run continuously and may emit RFI. The batteries must be removed to stop that equipment from operating. BTW, I wish I could figure out an easy way to reply to a posting here; I know I must be doing this the hard way. 73 Jerry KM3K Message: 19 Date: Thu, 01 May 2014 23:05:20 -0600 From: W0MU Mike Fatchett To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KX3 & Chasing local HF noise sources Message-ID: <53632790.4080...@w0mu.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Run the KX3 on battery and turn off your house mains and see if the noise goes away. If not you know to start looking elsewhere. You might also try the RFI reflector. Mike W0MU On 5/1/2014 10:47 PM, Niel Skousen wrote: > Good Evening All, > > Questions and Advice sought, i will report back on results... > (cross posted to qrp-l, elecraft, and kx3) > > I live in a rural area, which should be very low noise. i put up a OCFD (88:44) this afternoon, and tonite wandered on to 80m to listen and check the antenna. I had 20db over noise everywhere. 40m was showing S4 noise, and I could only copy about 4 or 5 stations above the noise on 40m (yep, NR and NB both on, 400hz wide). > > nearest neighbor is 1/4mi away, and I'm the last one on a rural overhead power line. > > So, Given a KX3 and internal batteries, my first thought is to build a small multi-turn electrostatically shielded loop (1ft dia, 3-5 turn in a copper pipe, 1" gap at top) and see if I can localize any local noise sources. > > my office and computers are prime targets of course... > > Is this overkill ? > Recommendations for a better small / near-field noise pickup ? > Any other advice for first steps ? > Anyone else chased noise sources with their KX3 ? How did it work, what antenna did you use ? > Other suggestions / recommendations ? > > TIA, 73 > Niel > WA7SSA __ 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] What crystal filters for the K3 are linear
Hello, Yesterday, Walt K6WRU wrote "In analog filter design, you get to choose between good phase performance and good amplitude performance. You can't have both. If you want a flat passband and steep skirts, you'll get wonky phase." I suppose that is basically correct for the standard "off-the-shelf" filters available to the ham community. However, filters can be produced that correct the group-delay. I have designed many such crystal-filters in my career spanning almost three decades. These filters were supplied to companies such as Harris for use in military equipment. A typical shape-factor 60dB/1dB would be less than 1.4. The corrected group-delay would be quite flat over perhaps 80% of the 1dB bandwidth. (For many years, one of my filter designs was part of the display in the lobby-area of Harris in Rochester NY; it may still be there for all I know.) Additionally, about the "Bessel" design, I would look first to either a" Gaussian to 6dB" or a "0.05 degree phase-ripple" approach. If I recall correctly, either choice can give sharper skirts than the Bessel and still have relatively flat group-delay. (I no longer have access to Zverev, my copy of which by the way was full of errors, especially in the band-reject section.) K6WRU wrote "There is no free lunch, it's physics." So true. Engineering is all about compromise; what do I have to give up to get what I still want. 73 Jerry KM3K __ 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] Fake FTDI chips
Hello Don W3FPR, I need to comment about "reputable brands" relative to USB-to-serial-adapters. Triplett-Keyspan is not reputable, in my opinion. The story goes like this. I have an AIM-4170 analyzer that needs a RS232 connection. The AIM works when connected to a Dell desktop's RS232 port. For portability, I wanted to use the AIM with my Dell laptop and bought a Keyspan adapter. Regrettably, much time went by before I could get back to the hobby and try the Keyspan but I never suspected a big problem would be lurking. Keyspan's USB-adapter, when plugged into the Dell laptop, would not work my AIM-4170 analyzer. So I tried plugging it into the desktop; still would not work. But incredibly, their technical-support put the blame on my AIM. By this time, it is past the warranty period. I bought a Radio-Shack adapter for the laptop; AIM works fine. To finish the story, I bought a HP-desktop. The Keyspan won't work there. For that HP, I also bought from HP a real RS232-card with two ports. The AIM works fine with those ports. So much for Keyspan's adapter and their tech-support. BTW, my KX3 kit came today. 73 Jerry KM3K __ 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-schematic and 2-pole crystal-filter
Hello, I posted the work below to an eHam forum and one reply suggested posting to this site. Thru another reply I have already verified that my interpreting of the K3-block-diagram is ok. So, left unanswered is the reason for the 2-pole crystal-ladder-filter. Hello, I'm to give a talk to our club next month about "roofing-filters". So, during my talk, I intend to show schematics for Yaesu's FT-5000 and Elecraft's K3; I choose these two because of their pristine locations on Sherwood's table. I'd have no problem explaining the 5000's block-diagrams; seems to follow the "expected script". But, with the K3's schematic: a) on its block-diagram (pg. 64), the five roofing-filters seem to not be in the expected location of immediately after the 1st-mixer. As I see it, the received signal-flow is...from the rec'r antenna, thru LC-bandpass-filters, attenuators, +12dB amp, then the 1st-mixer, a +17dB amp, the Noise-Blanker, finally the roofing-filters, and now an IF-amp, etc, etc. Am I interpreting the block-diagram correctly? b) on both dwg K3-RF-board and dwg KRX3-sub-rec'r, between the 1st-IF and the 2nd-mixer, a 2-pole crystal-ladder-filter is labelled as having a BW=14 KHz. I'm mystified why this part is there, especially since any of the preceding crystal-filters would have a significantly narrower bandwidth. Hopefully, someone could explain this conundrum. Also, I was not able to locate it on the block-diagram. That's about as far as I got trying to piece together an understanding of the K3-circuitry for now. Thanks in advance for any replies. 73 Jerry KM3K Thanks in advance for any replies. BTW, I'm only just a few hundred dollars short of buying the KX3. 73 Jerry-KM3K __ 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
