Re: [Elecraft] KX2 and Sherwood Eng. RX Performance Ranking?
I'd be willing to send Rob my KX2 for testing. 73, Matt NQ6N On Thu, Mar 9, 2017 at 2:42 AM, Jim Brown wrote: > On Wed,3/8/2017 8:41 PM, w7aqk wrote: > >> you are right to be concerned about how clean a transmitter is, but there >> are regulatory requirements about that. If you don't meet those standards, >> you supposedly can't sell it!!! >> > > Sadly, it goes FAR beyond that. See my comparison of ARRL Lab data for > selected popular rigs, some of them in the $10K range. Some of the most > expensive are really dirty on CW. http://k9yc.com/TXNoise.pdf Also look > at > > http://k9yc.com/P3_Spectrum_Measurements.pdf which consists of > measurements I've done myself of rigs that were made available to me. > > Most of the bad signals I hear are, I think, because someone is running >> things at "maximum'! >> > > Partly true, but some rigs are FAR dirtier than others. The link about > concentrates on CW. Many popular rigs generate splatter in their output > stage due to poor design of TX ALC. Using ALC between the rig and a power > amp to set TX power is recipe for splatter and clicks. Mistuning a power > amp, or failure to match an antenna to the power amp also causes splatter > and clicks. See http://k9yc.com/K6XXAmpTalk.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 m...@nq6n.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] KX2 and Sherwood Eng. RX Performance Ranking?
I would guess that it will perform nearly identically to a high serial number KX3, but it would be great to see some actual test results. 73, Matt NQ6N On Wed, Mar 8, 2017 at 2:03 PM, Mike Rhodes wrote: > Can't say for sure but doubt it has been reviewed yet. It is still pretty > new. > > Mike / W8DN > > On 3/8/2017 12:58 PM, Phil Hystad wrote: > >> I looked and I couldn’t find it. The KX2 being covered by the Sherwood >> Engineering Performance Rank table. Does anyone know if this is purposely >> skipped over for some reason, not covered yet, or is it there and I can’t >> find it sort of thing? >> >> Thanks for any comments. >> >> 73, phil, K7PEH >> >> __ >> 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 w8dn.m...@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 m...@nq6n.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] AGC White Paper
Is there a way to simulate different agc settings by generating sine wave CW signals and varying the relevant parameters? I'd like to write some code to allow for straightforward observation of the phenomena we are discussing and various assumptions about the input signals to be tested. It should be possible to create "mush" and also the desired response, I would think. It would be useful to those wishing to understand the theory in a more concrete way. Matt NQ6N On Mon, Mar 6, 2017 at 3:14 PM Brian Hunt wrote: > I noticed that your AGC curves were made with the RF gain full max. I > rarely operate that way. I usually turn the RF gain down to where the noise > peaks are barely kicking the S-meter. By doing so, is it fair to say I'm > moving the curve to the right? I.e, a higher signal amplitude before the > AGC kicks in for a given THR number? > > Nice presentation Al. Thanks. > > 73, > Brian, K0DTJ > > > On Mar 5, 2017, at 21:50, Al Lorona wrote: > > > > I spent a little bit of time this weekend and put together yet another > K3 AGC (YAKA) "white paper" to put some measurements and discussion of the > results down in the hope that others may benefit. > > __ > 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 m...@nq6n.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] Elecraft Website Hacked?
I've used Chrome for years with no problems. You might have accidentally installed a malicious "extension" for Chrome. I had a situation last year with an extension that was not flagged by Google as malicious in spite of many 1 star reviews and was also not flagged as malware by anti-virus and anti-malware programs. It was designed to set the referral cookie for eBay and Amazon to benefit some specific party. It was called something like "eBay helper". I'm hoping that Google starts identifying scam extensions like that as malware, but it's possible one has been installed on your machine. Check to see which Chrome "extensions" you might have installed. To do this, navigate to this URL: chrome://extensions/ I recommend uninstalling any that you are not certain of the origin of. 73, Matt NQ6N On Tue, Jan 3, 2017 at 4:00 PM, Richard Fjeld wrote: > I agree. I got rid of Chrome for the same reasons you describe. The > latest Firefox is good. > > Dick, n0ce > > > On 1/3/2017 7:46 AM, Don Wilhelm wrote: > > David, > > > > I access the Elecraft website 3 to 4 times a day. Mainly the manuals > > and the order pages, and have never had a problem. I use Firefox. > > > > 73, > > Don W3FPR > > > > On 1/3/2017 6:40 AM, Dave Fifield wrote: > >> I've been noticing that every now and then, when I'm on the Elecraft > >> website > >> looking around, my Chrome browser will get re-directed to spurious ad > >> websites instead of the link I clicked on the Elecraft site. Anyone else > >> noticed this? > > > __ > 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 m...@nq6n.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] K3S Sound Board upgrade for K3
Dick is correct. I'd also like to see this update available. 73, Matt NQ6N On Fri, Dec 23, 2016 at 4:19 PM RIchard Williams via Elecraft < elecraft@mailman.qth.net> wrote: > > > > > I think guy is referencing a "mod" that was first announced on the "blurb" > sheet Elecraft published on the differences and what would be available at > a later date to "update" the K3 to be similar to the new K3S. > Theoretically, at some future date there was/might be/possibly/maybe not, > an upgrade to the audio section of the K3. To date, I have not seen any > announcement of such an upgrade available. Quite possibly it moved from > the "was" to the "maybe not" category.Maybe Wayne can chime in with > some up to date information; to the best of my knowledge, this is the only > future update mentioned in the blurb that has not become available. > > Dick, K8ZTT > > > > From: Nr4c > > To: Gary Hembree > > Cc: Elecraft@mailman.qth.net > > Sent: Friday, December 23, 2016 2:30 PM > > Subject: Re: [Elecraft] K3S Sound Board upgrade for K3 > > > > Ok. KIO3B. > > > > Sent from my iPhone > > ...nr4c. bill > > > > > > > On Dec 22, 2016, at 10:30 PM, Gary Hembree wrote: > > > > > > Try this: > > > http://www.elecraft.com/elecraft_prod_list.htm#kio3bupkt > > > > > > 73 > > > Gary, N7IR > > > __ > > > Elecraft mailing list > > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > > Help: http://mailman.qth.net/mmfaq.htm > > > Post: mailto:Elecraft@mailman.qth.net > > > > > > This list hosted by: http://www.qsl.net > > > Please help support this email list: http://www.qsl.net/donate.html > > > Message delivered to n...@widomaker.com > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to richarddw1...@yahoo.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 m...@nq6n.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] incredible hum from PA
Mine is silent during normal use, but when someone in the house prints something using the laser printer that is on the same circuit, the transformer gives off a brief groan. I don't think this means my transformer is defective, would anyone disagree? 73, Matt NQ6N On Tue, Dec 20, 2016 at 11:10 AM Ron D'Eau Claire wrote: > I believe most of the noise comes from the steel bottom of the kpa500. > > > > 73, Ron AC7AC > > > > -Original Message- > > From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of > > Charlie T, K3ICH > > Sent: Tuesday, December 20, 2016 4:40 AM > > To: elecraft@mailman.qth.net > > Subject: Re: [Elecraft] [KPA500] incredible hum from PA > > > > > > "No trees were killed in the sending of this message. However, a large > > number of electrons were terribly inconvenienced !" > > > > Yeah, but you have to realize, electrons LIKE to run around madly. They > > LIVE for the opportunity to be driven by that strange (to them) > > electromotive force, regardless of whether it's in one direction (DC) or > > back and forth (AC), just as horses luv to run. > > They live basically a very nomadic life, jumping from one nucleus to > > another. They get sluggish if not driven regularly. This is why old stock > > vacuum tubes can fail while just sitting on the shelf. > > Electrons also appreciate the applause as horses do when they perform, but > > seldom get to enjoy it. So, when you make them run, at least provide a > > little noise so that know they're well liked. Hmmm, maybe THAT"s why the > > transformer hums? > > > > More to the point of the subject, I wonder if it would have been possible > to > > use a brass bolt or maybe even nylon mounting hardware for the big toroid? > > Probably not worth the effort is a simple re-tightening can fix it. > > ( You'll just have to provide some outside method of showing your > > appreciation to the electrons for their efforts.) > > > > 73 Charlie k3ICH > > > > > > > > __ > > 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 r...@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 m...@nq6n.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: very quiet on CW
Also be sure you don't have the NR turned on by accident. In my experience there is not a signifiant difference in audio amplitude of a signal in CW mode at 500Hz vs SSB mode at 500Hz when you adjust for the CW offset. 73, Matt NQ6N On Sat, Nov 19, 2016 at 1:36 PM, Don Wilhelm wrote: > Bill, > > If you have your 2.7 and 2.1 roofing filters (not the 6kHz) enabled for > CW, all should be well. > The total noise heard should be reduced as the DSP bandwidth is reduced > because the noise bandwidth is narrowed as well. > However signals which are tuned to the PITCH you have set (default is > 600Hz) should not be weaker than they are in a wider bandwidth. > Try using the WIDTH knob to increase the DSP bandwidth, and you should > hear the total band noise increase. > > Yes, the K3 is quiet as far as hearing the internal receiver noise (what > you hear when the antenna is removed). When you attach the antenna, you > should hear an increase in total noise if all is well - how much will > depend on the DSP bandwidth that is set. > > Remember that many SSB stations are running high power, while many CW > stations are running low power - that may be part of the difference you are > hearing. > > 73, > Don W3FPR > > On 11/19/2016 12:33 PM, Bill wrote: > >> I have not used my K3 for CW, so I have no experience with it. So, a >> couple of days ago I decided to give it a try, after all - winter is >> coming. >> >> When I switched to CW mode - things got deathly quiet. Quiet as in all >> the background noise vanished - along with most of the signals. I could >> see them unchanged on the P3 - but, had to turn up the audio gain to >> hear them. With the audio gain up, I could hear everything that my other >> rigs were hearing - except no background noise. Compared to my past >> experience - this is not normal. >> >> I am using a K3 set up for SSB and only having the 2.7. 2.1, and 6 kc >> filters. Some ACG changes have been made to afford improved arm chair >> copy on 75 and 40 meters. >> >> My question: Have I been missing out on using the quietest CW rig ever >> made or is there something wrong with my receiver? It just seems too >> quiet. >> > __ > 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 m...@nq6n.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] AGC INFORMATION
Louis, FWIW I like my K3 noisy, almost so it sounds like there is no AGC action, just enough to protect my ears from an unexpected loud signal. I've found that this makes it easiest to copy extremely weak CW signals that are below the noise, and prevents static pops from covering up the signal. The two settings to adjust are AGC threshold and AGC slope. Start with threshold as it will make the biggest difference in how strong vs weak signals sound. If you need finer-grained control, the AGC threshold can be useful. The other settings should be fine at their default values. The AGC decay "soft" setting is preferred by some in pileups, so you might try both settings. I found this writeup which looks pretty good: http://www.ad4c.us/Elecraft%20K3/AGC%20Tutorial.pdf 73, Matt NQ6N On Tue, Nov 15, 2016 at 7:42 PM, Don Wilhelm wrote: > Louis, > > I am not one to give you specific settings for you to just plug in and > use. If I did so, I would just tell you to use the default settings. > Every location and operating style is different, and you can enhance the > AGC performance to meet your particular situation. > > Please read the "Noisy K3" information on my webiste www.w3fpr/com to give > you guidelines on how to adjust your particular AGC. > Pay particular attention to the method for evaluating the results of your > adjustments - it is critical that you listen to short gaps in the CW or SSB > voice to determine the best settings for you. > > 73, > Don W3FPR > > On 11/15/2016 5:46 PM, louis a. ives wrote: > >> I have been following the thread with regards to the setting of the AGC >> of the K-3 with great interest. I am new to the use of the K-3 even though >> I have owned the radio for some time. I had a medical issue that delayed >> my use of the unit.My K-3 has been updated with all of the current K-3s >> upgrades and I use a KPA500. The thread has given several settings for AGC >> SLP and AGC THR but I noticed that the setting for the other AGC settings >> are not mentioned. Should I assume that the other default settings are to >> be used? I tried the suggested settings and found that they did help with >> the reception of weak signals. I work a lot of DX SSB and working the >> pileups can be a problem. I also would like to thank KE7X for the great >> book on the K-3, it has been a great help and has answered a lot of >> questions. >> Any help would be appreciated. >> Thanks in advance >> > __ > 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 m...@nq6n.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] K3S QST Article
Thanks, Wayne. This thread has been very interesting! 73 Matt NQ6N/9 On Mon, Oct 17, 2016 at 10:40 PM, Wayne Burdick wrote: > Our entire product line emphasizes portability, so we'll just have to > continue the never-ending search for 12 volt mojo. (Note: the new Upgrade > is a case of this; IMD is improved when running from lower voltages.) > > Stick with Elecraft and minimize your carbon footprint! > > 73, > Wayne > N6KR > > > > On Oct 17, 2016, at 5:48 PM, Guy Olinger K2AV wrote: > > > On Mon, Oct 17, 2016 at 7:47 PM, Kevin wrote: > > > >> The problem I have is accepting the status quo by Elecraft. Just because > >> everybody else is around -30dB shouldn't mean Elecraft stop trying to do > >> better. Let the portable/backpacking rigs use 12V MOSFETS and switch the > >> desktop model K3(s) to higher voltage finals. Yeah, yeah, I know, the > K3(s) > >> is supposed to be portable capable. How many people take their K3(s) > out in > >> the sticks...ever...save Field Day? > >> > > > > Oh yeah. > > > > "Just" change the supply voltage. AND the PA. And would that much heat > > dissipation even fit in the same space? OK. Everybody ready to go out > and > > buy a 28 volt power supply for the new K3S? The range of 12 volt supplies > > is way, way broader than 28 volt. The Astron LS35M 35A@28VDC is 380 > > dollars. Oh, a built-in? Where does it go in the case? > > > > And does the K3S add an internal inverter to produce 12V for everything > > else from the 28V? > > > > Lot of expense for a small improvement that they can get with a freebee > > change to a late developing gift improvement for the cost of shipping. > > > > What would be a practical way to actually introduce such a change? Lay > out > > all the specifics involved. Let's see your critical path item by item > plan. > > It's cheep and easy to just blurt out "they oughta go to 28 volts." > > > > 73, Guy K2AV > > > > > __ > 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 m...@nq6n.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] KX3 for sale
Correction: The unit contains the roofing filter. Apologies for the typo. 73, Matt NQ6N On Tue, Oct 11, 2016 at 10:37 AM, Matt Murphy wrote: > I'm considering switching to a KX2, if anyone is interested in my KX3 > please make an offer. > > - Mint condition 700 range serial number. > - Contains the crystal filter and ATU > - Includes the matching "Pro Audio Engineering" power supply. > - Includes a new matching pelican case. > - Includes the Elecraft matching paddle. > > Not in a hurry to sell and very happy with the setup, but my last trip > made me think that I might prefer the slightly smaller size transceiver so > I can pack more clothing in the same backpack. > > 73, > Matt NQ6N > > > __ 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 for sale
I'm considering switching to a KX2, if anyone is interested in my KX3 please make an offer. - Mint condition 700 range serial number. - Contains the crystal filter and ATU - Includes the matching "Pro Audio Engineering" power supply. - Includes a new matching pelican case. - Includes the Elecraft matching paddle. Not in a hurry to sell and very happy with the setup, but my last trip made me think that I might prefer the slightly smaller size transceiver so I can pack more clothing in the same backpack. 73, Matt NQ6N __ 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] Running stations with k3
> Now we're getting to the good part of this thread, which I've found quite illuminating, because it explains user preferences for one radio over another that aren't obvious. Thanks to Will, Guy, and Bill for their very useful contributions to the discussion. I agree, this is a very interesting topic. I've heard some lore about the TS-830 and 930, and the Yaesu FT-990 having very desirable receiver characteristics for hearing weak signals in pileups not necessarily due to a specific design goal or commensurate with minimizing close-in IMD, but as a byproduct of the overall receiver design whose distortion characteristics happen to work nicely in a pileup. In terms of the phase shift introduced by filters, I assume the distortion introduced by the filter is commensurate with the steepness of the skirts? On Wed, Sep 21, 2016 at 10:32 AM, Jim Brown wrote: > On Wed,9/21/2016 3:59 AM, Bill W4ZV wrote: > >> This is nothing new. K3ZO has been doing this for about 30 years (at >> least) >> using wide filters and his ears as DSP. I did this long ago with a >> TS-930S >> using SSB filters with CW VBT fully engaged which shifts two IF filters in >> opposite directions giving a broad overall response but peaked in the >> center. See K3ZO's comments here: >> > > Now we're getting to the good part of this thread, which I've found quite > illuminating, because it explains user preferences for one radio over > another that aren't obvious. Thanks to Will, Guy, and Bill for their very > useful contributions to the discussion. > > There's another VERY important factor related to bandwidth -- when we > narrow the bandwidth to copy a very weak signal buried in noise (as opposed > to QRM), the filter tends to ring at its skirts, making it more difficult > to copy rather than easier. I find this to be true independent of which > filter alignment I've chosen, and it's predicted entirely by classic filter > theory. The K2, which sounds great when listening through its TX filter, > has a multi-element crystal filter that it realigns to vary the bandwidth, > sounds just awful when set for narrow SSB bandwidths. It's all due to the > extreme phase shift in those filters. > > As another example from my work in pro audio, I was hired to try to clean > some really nasty buzz out of a "jailhouse" recording. This was in the late > '70s, and DSP didn't exist. My tool was a very high quality, very narrow > tunable notch filter with high and low pass filters, and I passed the > recording though it a half dozen times to attack the harmonics of the buzz. > With each pass, I reduced the buzz, but I also introduced more phase shift. > So as the signal to noise improved, the intelligibility degraded. > > 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 m...@nq6n.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] Running stations with k3
Interesting! Can anyone explain why zero beat CW would sound more "full bodied" with a 2.7 KHz IF than with, say, a 400 Hz IF bandwidth? It would seem that the CW signal was typically narrower than either one, so there would not be any information lost on a zero beat signal. Is there some sort of audio harmonic that exists only when the IF bandwidth is sufficiently wide? Or could the wider bandwidth effectively change the perceived audio impact of AGC (depending on band noise)? Is there a measurement of the distortion introduced by an IF filter across both the signal *and* the noise? I think noise sounds better (smoother?) with a wider IF filter bandwidth. Of course, the purpose of the narrower filter is to reduce IMD from nearby signals, not to make noise sound pleasant. I'm curious if anyone has thoughts or insights about any of the above... 73, Matt NQ6N On Tue, Sep 20, 2016 at 11:45 AM, Guy Olinger K2AV wrote: > The killer for that wide roofer approach is that loud enough stations can > pump the hardware AGC before the signal gets to the DSP. > > The "full body" (whatever that means) CW technique will NOT work in a DX > test I've been in (Will knows where) with that 45 over S9 Italian station > running 15 kW and a 4 element beam on 40m pointed at the US when the band > is wide open, and who has parked 400 Hz above or below me, AND I am trying > to copy an S0 (if even that strong) basement noodle antenna QRP station. > > I want the skirts of the roofing filter and the DSP to COINCIDE and when I > hit the edge of the 450 or 350 Hz, I want the skirts do a VERY sharp dive > to oblivion. This gives me a 450 kHz running bandwidth and a 350 running > bandwidth, which I can shift in 10 Hz steps, dropping a signal on the edge > about 10 dB per 10 Hz step. > > This way I get the same excellent selectivity with a K3 that I had with my > MP with cascaded INRAD filters in the 8 and 455 IF's. K3 is not superior to > the MP in selectivity or audio quality, but the K3 front end and low noise > opened up a new layer on 40 meters, going down past the DL and OK basement > noodle QRP stations and exposing the RUSSIAN basement noodle QRP stations. > > We thought that was band crap listening to the MP, but turned out to be RX > IMD, RX noise crap generated by the MP. Finally exposed by not being there > in the K3. > > If my skirts do NOT dive maximally, then the 15 kW Italian is going to pump > the K3's hardware AGC and make copy of my basement noodle QRP stations > impossible. > > I do know those (so far all in the western US) who insist that the DSP > selectivity is all they need. They might be right, out where they are. > > Idaho is not exactly the land of monster signals. If one really wants to do > "full body CW" out there, a 700 Hz roofer would be a better choice to be in > front of the DSP. Do you really want your AGC pumped by the next two or > three stations above and below your frequency? > > I've spent my time with radios with too-wide high IF selectivity. NEVER > AGAIN. > > Besides, having the steep diving combined selectivity converts key clicks > to spikes, which the K3 NB and AGC circuits handle splendidly, allowing key > click elimination, another K3 advantage trying to keep a run frequency 400 > Hz from a 45 over S9 15 kW Italian station. > > You think I'm kidding about 15 kW and 4 elements on 40m? Think again. Not > kidding about 45 over 9 on a calibrated K3 S meter either. Though we *were* > listening on a five element wide spaced (190 feet end to end) 40m quad. > > 73, Guy K2AV > > > > On Mon, Sep 19, 2016 at 9:21 PM, WILLIE BABER > wrote: > > > Hello All, > > > > I did M/M with a big station in the NW running Icom 7700. Needless to > say > > comparison between K3 (one was on site) versus Icom radios came into > > discussion during rest periods. Yes, the Icom 7700 played quite well, > > giving what some called "full-body" cw and easy to pick-out-stations > while > > running them. > > > > I like all radios...well almost all of them. Having said that, you can > > easily get "full-body" cw and better running of station if you simulate > the > > front-end of the Icom radio using K3. To do this, set the first I-F > filter > > to ssb bandwidth (2.7khz) and then use the DSP to deliver 500 hz > passband. > > You will hear stations that are within the 2.7khz window but not quite on > > your frequency (similar to 7700) while running stations, and without > having > > to fool so often with RIT. > > > > Once you go to 400 hz in the first I-F of K3 you are in serious high > > dynamic range territory...better have a k-pod on RIT and forget about > > "full-body" cw, which requires a wider first I-F. Of course when you > need > > a narrow first I-F you can have several of them in K3. > > > > My two cents. > > > > 73, Will, wj9b > > > > CWops #1085 > > CWA Advisor levels II and III > > http://cwops.org/ > > __ > > Elecraft mailing list > >
Re: [Elecraft] 240V Power Connectors
I think that since the breaker is for 30A I might just be able to install a NEMA 14-30 receptacle and connect the equipment ground pin to the steel conduit using a pigtail (and the two hots and neutral to the corresponding pins): http://waterheatertimer.org/images/240-Volt-outlet4-253.jpg Any cautions against doing this? I believe all the wall receptacles in my home have the equipment ground pin connected to the steel conduit, and that there are no separate wires run for equipment ground. 73, Matt NQ6N On Tue, Jul 12, 2016 at 9:36 AM, Clay Autery wrote: > Yup... I've used those... I am a BIG fan of the twist-lock NEMA 240VDC > plugs/receptacles for the MAIN 240 source coming into movable racks... > > __ > Clay Autery, KY5G > MONTAC Enterprises > (318) 518-1389 > > On 7/11/2016 5:16 PM, Jim Brown wrote: > > Assuming you have 20A breakers and #12 or larger copper, you want NEMA > > 6-20. See this link. > > > > https://en.wikipedia.org/wiki/NEMA_connector > > > > 73, Jim > > > > __ > 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 m...@nq6n.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] quick question about antennas
Jim -- Ahh, I think that would work. If the conduit works as ground (which I think it does here) I could use the kind pictured in the link below, and wire up a the power cable using the two hots and ground as you recommend: http://waterheatertimer.org/images/240-Volt-outlet4-253.jpg 73, Matt NQ6N On Mon, Jul 11, 2016 at 4:21 PM, Jim Brown wrote: > On Mon,7/11/2016 2:07 PM, Matt Murphy wrote: > >> I am guessing that installing a grounded 240V receptacle and using the >> conduit as ground is *not* up to code. >> > > It depends on the building code used by local jurisdiction. In many > jurisdictions, it IS legal to use conduit as the green wire IF it is > continuous and all the connections are made properly. As I recall, it's > legal in Chicago, where steel conduit is used for almost everything, in > large part to keep union electricians working. > > In other jurisdictions, or if the conduit is not properly bonded for the > entire length, a dedicated green wire must be run. > > If it were, then perhaps I could install a NEMA 6-30 receptacle (which has >> a ground pin and two hots). >> > > I don't know connectors by number, but what I would install is a standard > outlet with two hots and ground that is slightly larger than an ordinary > 120V outlet. Or even two outlets in the same steel backbox, like a 120V > duplex. > > 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 m...@nq6n.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] [KPA500] 240V connection advice
Hello, I am thinking of connecting my KPA500 to a 240V outlet that is close to the shack that has a NEMA 10-30 receptacle. I'm soliciting advice on how to proceed. As background, I am looking into this because the lights dim a bit when the amp is keyed down. It's a bit distracting and while I don't think the circuit is actually overloaded, it's definitely close to the limit. I was thinking of making a cable by modifying an IEC power cord (with C13 connector) by connecting the two wires to the two hots of a NEMA 10-30 plug, and ignoring the neutral plug AND ignoring the ground wire in the IEC power cord. A few questions about this approach: - Is it the correct way to wire the connectors together? - Is it dangerous in any way? - Is there anything that can be done to reduce/mitigate the danger (if any) other than having an electrician install a currently-up-to-code 240V circuit in the shack? - With respect to safety, assuming it is safe for the KPA500 would it be safe to run other amplifiers that require 240V? How would I determine this? It seems that clothes dryers that are connected via a NEMA 10-30 connector typically have the neutral pin connected to the chassis. Based on my research, the NEMA 10-30 connector was used widely before it was declared not up to code for new installations in 1996. Since many homes were built prior to 1996, I would imagine that others on the reflector might have encountered this sort of issue when dealing with 240V in the shack. Advice appreciated. 73, Matt NQ6N __ 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] N1MM Logger +
> I know people like to bad mouth Windows but the vast majority of stations out there are running it very successfully. I just don’t see any advantages to changing at the moment. It is true, and Windows continues to improve. I installed Windows 10 and have been very pleased with it. There is not currently a good reason for most hams to leave Windows. Fortunately, Windows 10 will soon offer Linux as an optional module, so many of the benefits of Linux may soon be available to Windows users. 73, Matt NQ6N On Sat, Jul 9, 2016 at 11:40 PM, Ken K6MR wrote: > “I think the amateur radio community would benefit tremendously from > transitioning to *n*x at some point in the future.” > > Until the Linux folks make the installation of new hardware as easy as it > is on Windows I don’t think it will ever happen. > > I tried to build the drivers for my serial card, network USB device, and > network serial server, and after spending a couple of days trying to figure > it out I gave up. I don’t have an extensive software background, but I do > have some programming experience with *nix systems. If you have a simple > hardware setup it might be ok but throw in anything unusual and it’s > hopeless. And then add in things like rotator controls (Windows only) and > there is little chance it will ever work. > > The next major release of the logger I use (DXLog.net) is going to support > Linux (and probably OSX) but without the third party hardware support I > won’t be changing. > > I know people like to bad mouth Windows but the vast majority of stations > out there are running it very successfully. I just don’t see any advantages > to changing at the moment. > > Ken K6MR > > > From: Matt Murphy<mailto:m...@nq6n.com> > Sent: Saturday, July 9, 2016 21:09 > To: a45wg<mailto:-unkno...@sy-edm.com> > Cc: Dauer, Edward<mailto:eda...@law.du.edu>; elecraft@mailman.qth.net > <mailto:elecraft@mailman.qth.net> > Subject: Re: [Elecraft] N1MM Logger + > > I'll chime in because this is something I've wondered about... > > N1MM+ is written in Microsoft's .NET framework. Recently this became a > cross-platform framework, and so theoretically the core functionality of > N1MM could be made to run natively on Linux or OSX. > > However, N1MM uses a variety of libraries and integrations that are not > cross-platform, and so if the N1MM team were to attempt to support Linux or > OSX there would be a ton of additional work simply dealing with the > confusion about what aspects would only work in Windows vs on other > platforms. > > For anyone trying to use N1MM on Linux or OSX, I highly recommend the > program called VirtualBox, which is a free alternative to Parallels and > VMWare. It is now owned/maintained by Oracle, and is very high quality. > You simply install windows in VirtualBox and N1MM and any other programs > work flawlessly. Microsoft makes free versions of Windows available to the > public that work for 90 days, and can easily be installed in VirtualBox. > > Linux and OSX both offer some tremendous advantages over Windows, and I > think the amateur radio community would benefit tremendously from > transitioning to *n*x at some point in the future. In the meantime, I have > my computers set up with VirtualBox or as a dual-boot. > > N1MM+ is superb software, and we are lucky to have such a skilled team of > people maintaining it. I'm continually impressed by the attention to > detail and small quality improvements that arrive with each new release. > > VirtualBox download link here: https://www.virtualbox.org/wiki/Downloads > > 73, > Matt NQ6N > > On Sat, Jul 9, 2016 at 10:11 PM, a45wg <-unkno...@sy-edm.com> wrote: > > > Guy, > > Out of interest from a SW Developer point of View what is N1MM > > written in ? > > > > Tim - A45WG > > > > > > > On 9 Jul 2016, at 18:38, Guy Olinger K2AV wrote: > > > > > > > > > They have stated that to create a parallel product for Mac platforms is > > > beyond their intentions and resources. Having had a few conversations, > > that > > > really does seem a fair and intelligent decision. For them, to keep > from > > > wasting precious volunteer resources on keeping up with OS > perturbations > > > not related to the product, their development platform and single > chosen > > OS > > > need to be as stable as possibly can be. They do seem open to a tweak > > here > > > and there for problems served up **completely analyzed and solved** in > > the > > > run-it-on-a-windows-emulator world. > > > >
Re: [Elecraft] N1MM Logger +
I'll chime in because this is something I've wondered about... N1MM+ is written in Microsoft's .NET framework. Recently this became a cross-platform framework, and so theoretically the core functionality of N1MM could be made to run natively on Linux or OSX. However, N1MM uses a variety of libraries and integrations that are not cross-platform, and so if the N1MM team were to attempt to support Linux or OSX there would be a ton of additional work simply dealing with the confusion about what aspects would only work in Windows vs on other platforms. For anyone trying to use N1MM on Linux or OSX, I highly recommend the program called VirtualBox, which is a free alternative to Parallels and VMWare. It is now owned/maintained by Oracle, and is very high quality. You simply install windows in VirtualBox and N1MM and any other programs work flawlessly. Microsoft makes free versions of Windows available to the public that work for 90 days, and can easily be installed in VirtualBox. Linux and OSX both offer some tremendous advantages over Windows, and I think the amateur radio community would benefit tremendously from transitioning to *n*x at some point in the future. In the meantime, I have my computers set up with VirtualBox or as a dual-boot. N1MM+ is superb software, and we are lucky to have such a skilled team of people maintaining it. I'm continually impressed by the attention to detail and small quality improvements that arrive with each new release. VirtualBox download link here: https://www.virtualbox.org/wiki/Downloads 73, Matt NQ6N On Sat, Jul 9, 2016 at 10:11 PM, a45wg <-unkno...@sy-edm.com> wrote: > Guy, > Out of interest from a SW Developer point of View what is N1MM > written in ? > > Tim - A45WG > > > > On 9 Jul 2016, at 18:38, Guy Olinger K2AV wrote: > > > > > > They have stated that to create a parallel product for Mac platforms is > > beyond their intentions and resources. Having had a few conversations, > that > > really does seem a fair and intelligent decision. For them, to keep from > > wasting precious volunteer resources on keeping up with OS perturbations > > not related to the product, their development platform and single chosen > OS > > need to be as stable as possibly can be. They do seem open to a tweak > here > > and there for problems served up **completely analyzed and solved** in > the > > run-it-on-a-windows-emulator world. > > __ > 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 m...@nq6n.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] Now that the K-Pod is shipping, we could use your help with useful macros
Is there a specification of how the macros work with the knobs? I have not yet ordered a K-Pod, but would love to write some useful macros (especially for the knobs). Perhaps I could test the macros using the K3 terminal in the meantime but it would be great to know how the knobs are configured to trigger macros first. Advice appreciated. 73, Matt NQ6N On Fri, Jul 8, 2016 at 10:42 AM, Roger Marrotte wrote: > Yes it does. It comes with two 6.8 ohm resistors. One 1/8 watt leaded > resistor and one 1/10 watt smd resistor. I did the mod with the smd > resistor. It's a small resistor about the size of a large fruit fly and it > goes kind of in a tight place, especially for a left hander. I got it in > and it works so I'm happy but if I had to do it again I'd probably used the > leaded resistor. I've done some smd work before. > > Roger, W1EM > > -Original Message- > From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of > Terry > Schieler > Sent: Friday, July 08, 2016 10:56 AM > To: 'Wayne Burdick' ; 'Elecraft Reflector' > > Subject: Re: [Elecraft] Now that the K-Pod is shipping, we could use your > help with useful macros > > Looks like my K-Pod should arrive tomorrow. Does it come with the DC power > modification resistors and mod instructions or do I need to order those? > > 73, > > Terry, W0FM > > __ > 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 m...@nq6n.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] K3 Firmware Feature Requests
I'm not sure if this is on the list of requested firmware features, so I'll mention it here just in case: Request 1: I'd like to be able to adjust the RX filter shift/width while transmitting. I often take a moment to assess things like passband, RIT, etc. when CQing during a contest, and if I'm extensively using the narrowest filter/shift to dig out weak signals, I like to revert to a wider passband for the next QSO. While I know I could do this using a CAT command, I'd like to be able to do it using the knob. Request 2: After using a Flex Maestro there is one clever feature that I think the K3 could incorporate via a small firmware change. The Maestro has a front panel knob that adjusts the AGC threshold. I find this useful because in some band conditions turning the knob feels like it makes a big improvement (different signal levels, static, etc.). I'd like to request that one of the K3's front-panel encoders be optionally made to adjust AGC threshold. Perhaps VFOB or the RIT knob -- perhaps both RIT and XIT lights could come on when that knob was in AGC THRESH mode. (maybe a knob on the K-Pod could be assigned to this as well... I don't own one yet). 73, Matt NQ6N __ 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] Bands are open -- CW WPX is a great time to test-drive a new KX2
I had some fun in WPX last night on 40M with my KX3 portable (on a screened-in porch) in Michigan. Used an ez-hang to install a 120' longwire in a 90' tree (I landed a perfect first shot between two high limbs). Felt like I was running 100W and the RX audio was a joy to listen to. I didn't win all jump balls but easily worked a fair bit of DX. The higher bands weren't as favorable for me this morning but looking forward to tonight. 73, Matt NQ6N On Saturday, May 28, 2016, Roger Marrotte wrote: > I've been doing just that. Working Europe on 5 watts and a dipole. Of > course I'm in New England. We're a little closed to Europe than you west > coast guys. Works great. Just like a mini K3! > > Roger, W1EM > > -Original Message- > From: Elecraft [mailto:elecraft-boun...@mailman.qth.net ] > On Behalf Of Wayne > Burdick > Sent: Saturday, May 28, 2016 5:02 PM > To: Elecraft Reflector > > Cc: k...@yahoogroups.com > Subject: [Elecraft] Bands are open -- CW WPX is a great time to test-drive > a > new KX2 > > Things are jumping, even on the high bands. Lots of DX on 15 and 20 m, and > I > just worked Uruguay on 10 m (10 watts, internal battery, dipole :) > > Get thee to a shack nearby and Operate :) > > 73, > Wayne > N6KR > > > __ > 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 marro...@verizon.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 m...@nq6n.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] OT Apple Airport Extreme RFI
I have one but only use the wifi network... No issues with RFI. On Sunday, February 28, 2016, James Austin wrote: > I have the same problem, 50-100 watts would shut mine down. Never did solve > it, but have only been operating QRP since a recent move. > > Jim KA2RVO > > On Sun, Feb 28, 2016 at 1:24 PM, David Ahrendts > > wrote: > > > Just replaced an older circa 2012 Apple Time Capsule with a new Airport > > Extreme in my home gigabit network. And in the category of “it’s always > > something,” I discover that the AEX powers down with my K3S/KPA500 at 500 > > watts. Just shits off. Admittedly, they sit just feet away from each > > other, but care is taken to separate RF lines from audio lines and > network > > lines. The newer AEX introduces Apple’s 802.11ac protocol. Any guesses? > > > > David A., KK6DA, LA > > > > > > David Ahrendts davidahren...@me.com > > > > > > > > > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to ka2...@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 m...@nq6n.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] KX3 power supply
I bought one of the pro audio engineering KX3 power supplies and it works perfectly. 73, Matt NQ6N On Mon, Jan 18, 2016 at 1:31 PM, Howard Hoyt wrote: > John, > > I do have a horse in this race (the Kx33), but I will tell you that in > testing many supplies I have seen that many of them have poor regulation. > Some show as much as 25% peak over-voltage which you would need a scope to > see when a load is removed, which is the situation when the KX3 returns to > receive after a full-power transmit cycle. Running 15.4V average could > potentially mean 19.25V peak with such a supply. > > This reason plus many others is why we designed the Kx33. We like our > KX3s! > > Cheers & 73, > > Howie - WA4PSC > www.proaudioeng.com > > > >>I would hate to hurt my KX3 with over voltage?? > >>anyone know if there would be any short or long > >>term problems with running 15.4 volts to the KX3? > >>It is just slightly above the maximum recommended > >> supply voltage > __ > 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 m...@nq6n.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] Elecraft Website
This useful utility can help in this kind of situation: http://downforeveryoneorjustme.com/ On Thursday, December 31, 2015, Doug Person via Elecraft < elecraft@mailman.qth.net> wrote: > No problems from rural Colorado using satellite. FYI, there are a lot of > players involved in transporting web data from a server to your browser. > Sometimes a given url will get blacklisted because something suspicious was > detected. These false alarms usually clear up in an hour or 2. Be sure to > clear your browser cache before retrying. Rebooting won't clear it. Each > browser is a little different. Do a Google search on "clear cache" and > your browser name if you can't locate the proper option. > > 73, Doug -- K0DXV > > On 12/31/2015 12:22 PM, Robert Dorchuck wrote: > >> I am still unable to connect to the Elecraft website. I have re-booted, >> cleared everything that I know of and re-booted the modem. Any ideas? I >> have Verizon FIOS and do not have any other sites that I cannot connect to >> (that I know of). >> Bob W6VY >> >> __ >> 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 k0...@aol.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 m...@nq6n.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] Re Elecraft] Crackling in Headphones
Just wondering if either of you have done the RF gain calibration before and/or after the synth board upgrade. 73, Matt NQ6N On Monday, November 30, 2015, Brian D. Comer wrote: > > > I have noted a similar Cracking in the speaker when listing to AM broadcast > station KFI (640 KHz). At first I assumed it was just overload as I was > using a 160 meter dipole and the signal strength meter was maxed: however > moving to steppir antenna tuned to 40 meters gave the same result with and > smeter reading of only S9. > > I have a local AM station on 1450 KHz that produces a -10 dBm into a > spectrum analyzer and -30 dBm on the P3. I had assumed from this, without > making any further checks, that the receiver was just overloaded. > > The cracking sound does not sound like any dynamic range problem I have > heard before but I have not taken the time to make any serious tests. > > I make these comments because I am not convinced this is any form of > overload and wonder if it could be related to your problem. > > > > 73 Brian KF6C. > > > > On 30 Nov 2015 14:02, j...@kk9a.com wrote: > > > There are times that I have noticed a crackling sound in my headphones > > > with my K3S. This is not the normal band noise static that has depth, > > > this crackle sound seems very close to my ears. I first noticed it > > > with my Heil headset and I tried wiggling the connection, changing the > > > RX EQ settings and turning on noise reduction but nothing had any > > > effect. It randomly comes and goes and I think I have also heard it on > > > TX. I thought perhaps it was related to the Heil brand headphones. > > > Last night I plugged in a new Sony professional headphone and the > > > crackling sound was very strong for a few minutes and then eventually > > > went away. I have never experience this with any other radio and I > > > have no idea what is causing it or how to make it go away. > > > > > > John KK9A > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to m...@nq6n.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] KPA 500 voltage drop on key down
I just set up my KPA 500 and the HV on standby is 72.5 volts. On key down, however, it drops to 48 volts and the lights in the shack noticeably flicker a bit. Would changing a the tap on the transformer potentially help things? Or is the real issue the voltage drop between the pole and the wall socket? Suggestions/ideas would be much appreciated, as well as tips for debugging any issues with the household wiring. Per the KPA 500 manual, the amp may fault if the voltage under load gets below 60VDC, so running in it with reduced drive may be necessary. While doing that wouldn't be the end of the world, I'd like to address the root cause if possible. 73, Matt NQ6N __ 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] Corrected QST review of KSYN3A is on line.
Any chance someone could post an excerpt? 73, Matt NQ6N On Thu, Oct 22, 2015 at 10:27 PM, Guy Olinger K2AV wrote: > I just pulled that up via the web page. It IS revised. You probably need to > force refresh the page to get rid of the old version in your browser cache. > > 73, Guy K2AV > > On Thursday, October 22, 2015, Ignacy wrote: > > > No change at http://www.arrl.org/reviews-listed-by-issue > > Ignacy, NO9E > > > > > > > > -- > > View this message in context: > > > http://elecraft.365791.n2.nabble.com/Corrected-QST-review-of-KSYN3A-is-on-line-tp7609422p7609468.html > > Sent from the Elecraft mailing list archive at 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 k2av@gmail.com > > > > > -- > Sent via Gmail Mobile on my iPhone > __ > 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 m...@nq6n.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] P3 for sale or trade for KX3
I am thinking of selling my P3 (mint condition, purchased new, assembled). Please make an offer, or if you have a KX3 to trade please let me know the amount of additional money you would want to make a trade (as well as what options the KX3 contains). Please email me off list. I will include free shipping in the continental US for the P3. I love the P3 but end up mostly doing guest operating so rarely use it. 73, Matt NQ6N __ 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] Windows Computer for K-line station
Have not evaluated compatibility with ham software but plan to do so in the near future. The price is right ($35). http://www.adafruit.com/products/2358 Also windows 10 will be free for this device: https://dev.windows.com/en-us/featured/raspberrypi2support I've had good success using Mac hardware for ham stuff, both using virtualbox and using bootcamp. If you have specific compatibility glitches that you've run into, you might want to post them to the list just in case any of us have found a solution. 73, Matt NQ6N On Thu, Mar 19, 2015 at 11:18 AM, Phil Hystad wrote: > I have read a few answers to this post below but I am not sure what is > meant by the request: > > > So, advice please - what is the smallest > > (physically the smallest) > > Do you mean physically small monitor or physically small computer. > > I just noticed that the new Raspberry Pi (about the size of a credit card) > is coming out with support for Windows 10 when it is released. I can't > imagine finding a smaller Windows machine. > > 73, phil, K7PEH > *Mac fanatic, but maybe I will experiment with the new RPi/Windows 10. > > > > > > Subject: [Elecraft] Windows Computer for K-line station > > Message-ID: > > Content-Type: text/plain; charset="iso-8859-1" > > > > OK; I give up. Trying to use a Mac at the station QTH is just too > > much trouble - too much of the good stuff doesn't come in the Apple > > flavor. Even the Dell monitor I just bought for the P3 SVGA doesn't > > come with drivers for Mac OS, which limits some of the tricks the > > monitor can play. So, advice please - what is the smallest > > (physically the smallest) > > > __ > 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 m...@nq6n.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] FW: Where do Old Synths Go?
I'd guess the reason is b/c most users are unlikely to use tech mode entries all that often, and so hiding them makes the remaining items easier to find. 73, Matt NQ6N On Sat, Mar 7, 2015 at 4:40 PM, Dauer, Edward wrote: > > The K3 Owner’s Manual at p. 49 says: "Most calibration procedures use > Tech-Mode menu entries. To enable these, set CONFIG:TECH MD to ON. Set > TECH MD to OFF afterward.” I have no idea why. > > > KN1CBR > > > > > > > >On 3/7/15, 3:32 PM, "Mike Reublin NF4L" wrote: > > > >>Ted - > >>unless Tech Mode is łON˛ in Config. Since it is recommended that Tech Md > >>> be normally off > >> > >>When I first discovered TechMode, I turned it on and it's been on for > >>years now. Who recommended it be off and why? > >> > >>73, Mike NF4L > > > > __ > 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 m...@nq6n.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] CW listening pitch
This website will let you generate an equal loudness curve for your own hearing: http://newt.phys.unsw.edu.au/jw/hearing.html 73, Matt NQ6N/9 On Sat, Feb 28, 2015 at 6:47 PM, Phil Hystad wrote: > I played clarinet in the 6th grade -- hated it. I was a mathematician > (programming a lot > of mathematical applications and other things). And I still love > mathematics because > Mathematical Physics is my primary hobby (or, passion). Ham radio comes > second except > in the summer ham radio could count as third to woodworking as second. > > I learned CW when I was 9 years old. By the time (much later) when I took > my Novice > test, I was probably copying more than the 13 wpm required of the General > class. > > This is off-topic so far -- but my tone frequency of choice is 640 Hz. > > phil K7PEH > > > On Feb 28, 2015, at 3:49 PM, Phil Wheeler wrote: > > > > I failed clarinet, but am a mathematician, or was. That seems to have > worked. > > > > Phil W7OX > > > > On 2/28/15 3:27 PM, Phil Kane wrote: > >> On 2/28/2015 2:44 PM, David and Dianne on Comcast wrote: > >> > >>> BTW there really is a strong correlation between learning to play music > >>> and learning CW. Not a direct one.but similar > >> My late brother (KU2P / 4X1AK) was a clarinetist as well as a > >> programmer, and taught himself CW with no problems. May he rest in > peace. > >> > >> 73 de K2ASP - Phil Kane > >> Elecraft K2/100 s/n 5402 > > > > __ > > 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 phys...@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 m...@nq6n.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 - What settings to use for RX and TX Audio
If you want ragchew audio it probably makes sense to: - turn the preamp off - use slow AGC - use as wide a passband as band conditions permit (phone) and about 800Hz on CW - in the receive EQ perhaps reduce band 7 and 8 a bit to remove some of the highest pitched sounds/noise - listen through a larger speaker to add a bit more resonance than the built-in speaker can provide. - For TX you can listen on the monitor using headphones and fine tune it to be exactly how you want. I think K9YC had some recommended presets for TX EQ for contest audio. 73, Matt NQ6N On Thu, Feb 26, 2015 at 3:04 PM, Bill wrote: > Take a look at: http://www.w2blc.net/K3.htm > > Just be forewarned - these are settings I use and other users may not like > them. > > Bill W2BLC K-Line > > > __ > 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 m...@nq6n.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] Terminal Emulator for MAC OS X
Ted, I like one called iTerm2: http://iterm2.com/ You can also install XQuartz and use a regular old xterm: http://xquartz.macosforge.org/landing/ Both are free. 73, Matt NQ6N On Tue, Oct 7, 2014 at 5:35 PM, Dauer, Edward wrote: > Programming a Pig Knob for the K3 requires a terminal emulator, and the > built-in app in OS X seems not up to the job. Can anyone recommend a good > app for the purpose? Thanks, > > Ted, KN1CBR > __ > 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 m...@nq6n.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] Want to buy
I have one. 100 dollars shipped. 73 Matt NQ6N On Jul 5, 2012, at 2:32 PM, Ed Stallman wrote: > looking for an LP-PAN and sound card for the K3 ..let me know what > you have and price > > Thanks Ed N5DG > > __ > 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 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
Re: [Elecraft] MCU 4.51
I seem to have missed the 4.51 release, though I got 4.50. Would someone mind forwarding it over? Matt NQ6N On May 11, 2012, at 10:37 PM, Gary Gregory wrote: > *Toby, > > Same results here. > > Gary > * > On 12 May 2012 13:55, Toby Pennington wrote: > >> I don't know what others have been experiencing using the new 4.51 >> firmware version, but I really think it is an improvement. >> >> I have been listening to pileups tonight on 20 meters and cannot discern >> any mushy weak cw signals, signals are crisp and easily readable. >> >> Maybe I need bigger pileups to get a better handle on this aspect, or >> certain band conditions. I run the threshold at 14 and the AGC SLP is set >> to 000. >> >> The Noise Blanker is improved. I was able to get rid of s7 line noise, >> and no distortion in the audio of the received signal. NB settings are >> dsp T2-4, and the IF is NAR 4. So, the noise is being eliminatd with low >> setting of the NB. I suppose the real test will be when I hear s9 plus >> line noise which I frequently get here. >> >> AF Gain is set to LO in the config menu and have plenty of nice and crisp >> audio. I am listening to SSB on 80 meters now and have the RF gain set to >> about 9:00 and AF gain about 12 oclock. Just lots of gain and audio. >> >> I think 4.51 is ready to go BETA. What do others who are using 4.51 >> think? >> >> >> Toby W4CAK >> >> __ >> 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 >> > > > > -- > Gary > VK4FD - Motorhome Mobile > Elecraft Equipment > K3 #679, KPA-500 #018 > Living the dream!!! > __ > 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 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
Re: [Elecraft] 6 meters
Depending on how thorough the screening is, it might also suffice to disable 6m in the config menu. -Matt NQ6N On Wed, May 9, 2012 at 8:01 AM, Tom Azlin N4ZPT wrote: > Have you emailed or called Elecraft directly to see if they already have > a set up version that fits Thailand? Seems like a question for the > factory not the list. > > Their factory configuration set up program might be able to turn off 6m. > > 73, tom n4zpt > > On 5/8/2012 2:10 PM, ussv dharma wrote: > > I am moving to HS0...they do not allow K3 import because it has 6 meters > (not allowed in thailand). Is there a way to eliminate 6 meters from my K3 > so I can try to get it type accepted? They do allow the K2. > > > > > > If you don't change direction you WILL arrive exactly where you're > headed!! > > > > Susan Meckley, Skipper W7KFI-mm AFA9SM > > USSV DHARMA > > __ > 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 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
Re: [Elecraft] Fw: RTTY Questions
Jim wrote: *as long as you take reasonable care to get levels right* How does one determine the ideal balance of line out volume, line in sensitivity, sound card output volume, and sound card mic sensitivity? 73, Matt NQ6N On Thu, Apr 19, 2012 at 7:02 PM, erehm wrote: > Rich - Thanks. The was really helpful. > > Wayne - Could FSK control be added to ACC2 GPIO (like K3 ACC DIG0) and PTT > toggled via the microphone connector, thus both available simultaneously to > external RTTY software? > > I'm new at this, so apologies if I've proposed something stupid... > > /eric, kj7ae > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/RTTY-Questions-tp7478189p7482903.html > Sent from the Elecraft mailing list archive at 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 > __ 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
Re: [Elecraft] K3 power reduction due to high SWR
Interesting! The balun I made is just a basic core type current balun modeled after the one listed here (but made with high temp wire inside teflon tubing): http://vk5ajl.com/projects/baluns.php#current On Thu, Apr 5, 2012 at 2:15 PM, Adrian wrote: > The external balun you are using is probably better than the one built into > the tuner. An English ham did research some time back and found using a > 1:1 > current balun less lossy that a 4:1 or others, despite the line mismatch > the > tuner made up for it with tested less total loss. > > With a well designed tuner/balun combo the circulating current is much > less, > and it is only the resistance component that provides loss, not inductive > nor capacitive. > > vk4tux > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Matt Murphy > Sent: Friday, 6 April 2012 5:53 AM > To: d...@w3fpr.com > Cc: Vic K2VCO; elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3 power reduction due to high SWR > > One related question, when speaking of the efficiency of a balanced > feedline > + balun and tuner, what would be a best/worst case scenario for the loss > introduced by the balun+tuner? Would loss vary significantly by frequency > for a nonresonant antenna? I'm trying to develop an intuition about the > lossiness of the tuner+balun compared to, say, 50' of RG213. > > I've opted to use a 1:1 balun at the end of 450 ohm ladder line, then a > short length of coax into a TenTec 229 tuner. In the informal test that I > performed, the homebrew 1:1 balun + coax jumper improved the performance of > the antenna compared with connecting it directly to the balanced line > connectors on the back of the tuner. > > 73, > Matt NQ6N > > > > On Thu, Apr 5, 2012 at 12:23 PM, Don Wilhelm wrote: > > > Vic, > > > > Where was the frequency of the GDO with respect to the band the tuner > > was set to? If it was below the band of interest, I would expect > > something like that - the T-Network is a high pass filter. > > > > 73, > > Don W3FPR > > > > > > On 4/5/2012 12:28 PM, Vic K2VCO wrote: > > > Speaking of balanced lines and tuners, I recently did an experiment > > > that > > surprised me. > > > > > > I have a dipole fed with 600-ohm open-wire line (and some window > > > line > > indoors). I usually > > > tune it with a Johnson Matchbox, a fully balanced link-coupled tuner. > > > > > > I was lucky enough to get my hands on a massive, high-quality > > > edge-wound > > rotary inductor > > > in a well-made aluminum enclosure. So I built a high-power T-network > > tuner with it. I > > > purchased a good (and expensive) 1:1 balun designed for use after a > > tuner from DX > > > Engineering, and compared the T-net + balun to the Matchbox. I > > > didn't > > notice any > > > difference in the strength of received signals between the tuners. > > > > > > But here is the surprising part: I expected that the Matchbox would > > provide better > > > balance, which would reduce radiation and pickup from the feedline. > > > To > > test this, I > > > coupled a grid-dip oscillator to the feedline about 20 feet from the > > tuner. > > > > > > To my great surprise, the signal from the oscillator was much weaker > > with the T-network + > > > balun than with the Matchbox! > > > > > > Signals the same, 'noise' weaker. So much for the need for 'truly > > balanced' tuners! > > > > > __ > > 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 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 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 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
Re: [Elecraft] K3 power reduction due to high SWR
Thanks Ron for the great explanation. 73 On Thu, Apr 5, 2012 at 1:41 PM, Ron D'Eau Claire wrote: > Most tuner losses occur in the same way as feed line losses - resistive > losses in the conductors. In a tuner, that is usually in the inductance. > The > higher the current, the greater the resistive losses. > > That's why high impedance feed lines such as open wire line have typically > much less loss than 50 ohm coaxial line. Higher impedance means higher > voltages and less current for a given power. (Excepting the use of some > "ladder line" that has very small gauge conductors which offset at least > some of its advantage). > > Tuners that must feed very low impedance loads often suffer losses in the > inductors due to the high currents required. > > Some tuners such as the popular T-network type may have more than one > combination of settings that will provide a match. One setting can produce > much more current and so greater loss than the other. W9CF wrote a Java > simulator that lets you see the predicted losses for various conditions. > Just twirl the knobs and watch the SWR or let it "auto-tune" for a given > load and frequency: > > http://fermi.la.asu.edu/w9cf/tuner/tuner.html > > 73, Ron AC7AC > > > > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Matt Murphy > Sent: Thursday, April 05, 2012 12:53 PM > To: d...@w3fpr.com > Cc: Vic K2VCO; elecraft@mailman.qth.net > Subject: Re: [Elecraft] K3 power reduction due to high SWR > > One related question, when speaking of the efficiency of a balanced > feedline > + balun and tuner, what would be a best/worst case scenario for the loss > introduced by the balun+tuner? Would loss vary significantly by frequency > for a nonresonant antenna? I'm trying to develop an intuition about the > lossiness of the tuner+balun compared to, say, 50' of RG213. > > I've opted to use a 1:1 balun at the end of 450 ohm ladder line, then a > short length of coax into a TenTec 229 tuner. In the informal test that I > performed, the homebrew 1:1 balun + coax jumper improved the performance of > the antenna compared with connecting it directly to the balanced line > connectors on the back of the tuner. > > 73, > Matt NQ6N > > > > On Thu, Apr 5, 2012 at 12:23 PM, Don Wilhelm wrote: > > > Vic, > > > > Where was the frequency of the GDO with respect to the band the tuner > > was set to? If it was below the band of interest, I would expect > > something like that - the T-Network is a high pass filter. > > > > 73, > > Don W3FPR > > > > > > On 4/5/2012 12:28 PM, Vic K2VCO wrote: > > > Speaking of balanced lines and tuners, I recently did an experiment > > > that > > surprised me. > > > > > > I have a dipole fed with 600-ohm open-wire line (and some window > > > line > > indoors). I usually > > > tune it with a Johnson Matchbox, a fully balanced link-coupled tuner. > > > > > > I was lucky enough to get my hands on a massive, high-quality > > > edge-wound > > rotary inductor > > > in a well-made aluminum enclosure. So I built a high-power T-network > > tuner with it. I > > > purchased a good (and expensive) 1:1 balun designed for use after a > > tuner from DX > > > Engineering, and compared the T-net + balun to the Matchbox. I > > > didn't > > notice any > > > difference in the strength of received signals between the tuners. > > > > > > But here is the surprising part: I expected that the Matchbox would > > provide better > > > balance, which would reduce radiation and pickup from the feedline. > > > To > > test this, I > > > coupled a grid-dip oscillator to the feedline about 20 feet from the > > tuner. > > > > > > To my great surprise, the signal from the oscillator was much weaker > > with the T-network + > > > balun than with the Matchbox! > > > > > > Signals the same, 'noise' weaker. So much for the need for 'truly > > balanced' tuners! > > > > > __ > > 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 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 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
Re: [Elecraft] K3 power reduction due to high SWR
One related question, when speaking of the efficiency of a balanced feedline + balun and tuner, what would be a best/worst case scenario for the loss introduced by the balun+tuner? Would loss vary significantly by frequency for a nonresonant antenna? I'm trying to develop an intuition about the lossiness of the tuner+balun compared to, say, 50' of RG213. I've opted to use a 1:1 balun at the end of 450 ohm ladder line, then a short length of coax into a TenTec 229 tuner. In the informal test that I performed, the homebrew 1:1 balun + coax jumper improved the performance of the antenna compared with connecting it directly to the balanced line connectors on the back of the tuner. 73, Matt NQ6N On Thu, Apr 5, 2012 at 12:23 PM, Don Wilhelm wrote: > Vic, > > Where was the frequency of the GDO with respect to the band the tuner > was set to? If it was below the band of interest, I would expect > something like that - the T-Network is a high pass filter. > > 73, > Don W3FPR > > > On 4/5/2012 12:28 PM, Vic K2VCO wrote: > > Speaking of balanced lines and tuners, I recently did an experiment that > surprised me. > > > > I have a dipole fed with 600-ohm open-wire line (and some window line > indoors). I usually > > tune it with a Johnson Matchbox, a fully balanced link-coupled tuner. > > > > I was lucky enough to get my hands on a massive, high-quality edge-wound > rotary inductor > > in a well-made aluminum enclosure. So I built a high-power T-network > tuner with it. I > > purchased a good (and expensive) 1:1 balun designed for use after a > tuner from DX > > Engineering, and compared the T-net + balun to the Matchbox. I didn't > notice any > > difference in the strength of received signals between the tuners. > > > > But here is the surprising part: I expected that the Matchbox would > provide better > > balance, which would reduce radiation and pickup from the feedline. To > test this, I > > coupled a grid-dip oscillator to the feedline about 20 feet from the > tuner. > > > > To my great surprise, the signal from the oscillator was much weaker > with the T-network + > > balun than with the Matchbox! > > > > Signals the same, 'noise' weaker. So much for the need for 'truly > balanced' tuners! > > > __ > 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 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
Re: [Elecraft] FW: KAT500 vs KAT3 Matching Range
Would it be fair to assume that if the KAT3 matches a load sufficiently to allow the transceiver to put out 100W that the KAT500 would match the same load safely for 500W? Matt NQ6N On Thu, Mar 29, 2012 at 12:57 PM, Andy Wood wrote: > Hi Dick, > > Thanks for the confirmation - that is what I hoped the answer would be. > Thanks also to all others that have responded, both on and off list. > > Andy VK4KY > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/KAT500-vs-KAT3-Matching-Range-tp7416153p7419080.html > Sent from the Elecraft mailing list archive at 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 > __ 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] two k3's on the same band
Just wondering if anyone has any experience using two K3's on the same band (for example, one for running, one for mults in a multi-op single transmitter scenario). Is there any danger of damaging the receiver(s) by transmitting with high power so close by (different antenna, same property). Is there a difference if the transmission is a few KHz away vs (accidentally) on the same frequency? Just curious what sorts of precautions (if any) ought to be taken and what solutions exist (if necessary). 73, Matt NQ6N __ 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
Re: [Elecraft] G5RV antenna experience on K3
I was using a G5RV but noticed that it performed poorly on 10 and 15m. I switched to a nonresonant dipole of similar overall length, fed with 450 Ohm ladder line, which works noticeably better on 10 and 15m (I think this is due to loss from the 50' of coax I had been using to feed the G5RV). The K3 has a filter designed to prevent IF output in the transmitted signal, which will heat up if there is excessive reflected power on nearby frequencies such as 40m (even if you have the load tuned to a 1:1 match with the built in antenna tuner). I found this out when I loaded up the nonresonant dipole on 40m and smoke soon began coming out of the K3. Upon further investigation, I discovered that there was a suspect PL-259 involved (not going to buy the DXE Crimped pre-made jumpers anymore). Dale at Elecraft advised that he'd avoid attempting to tune anything over a 5:1 or 6:1 SWR on 40m without risking destroying the filter again. So even after replacing the jumper I have opted to use an external antenna tuner when using the nonresonant dipole on 40m. I had used the G5RV extensively on 40m but never really paid attention to what SWR it was presenting to the rig w/o the tuner. All I can conclude from this is either that it was under 6:1 or that Dale's estimate of a 6:1 SWR was a bit cautious. I have suggested a firmware update that would reduce forward power on 40m in the presence of high reflected power, but is probably not all that high on the priority list for Elecraft. Another option is to remove the filter, at which point I would imagine that any load that the KAT3 can match is going to be fine. 73, Matt NQ6N On Fri, Mar 9, 2012 at 11:11 AM, W4GRJ wrote: > I use a G5RV mainly on MARS freqs. From 3.2 MHz to 30 MHz using the k3 and > internal ATU with great success. Never found a frequency it would not > easily tune. > > Jack > W4GRJ / AFA4DG > > On Mar 9, 2012, at 1:33, Dick Roth wrote: > > > Hi there-- > > > > Am considering putting up a g5rv antenna and was wondering what > > experiences K3 users have with this antenna. Is an external tuner > > necessary? Is internal ATU3 up to the task of taming this wire? > > > > Any hints will be helpful! > > > > -- > > 73 de Dick, ka1oz > > Elecraft K3/100 > > GAP Titan-DX Antenna > > > > > > > > > > __ > > 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 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 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
Re: [Elecraft] K3: verifying IF output
Don -- Yes, same cable. I just had a faulty audio cable from radio shack the other day. 73, Matt NQ6N On Sun, Mar 4, 2012 at 12:02 PM, Don Wilhelm wrote: > Matt, > > Did you use the same cable to connect to the 2nd rig as you are using to > connect to LP-Pan? > It would not be the first time a faulty cable was to blame. > > 73, > Don W3FPR > > > On 3/4/2012 2:38 PM, Matt Murphy wrote: > >> Thanks to Iain and the others who responded off the reflector. I plugged >> in the K3's IF output to the second rig's sub RX input and sure enough >> heard the same signals. When the Sub-RX was set to 8.215 MHz it appeared >> that there was about a -1.3 KHz difference between the VFO position that >> would tune in the signal on the K3 vs via the IF. I imagine this is >> normal >> (someone please let me know if it's not). >> >> __ 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
Re: [Elecraft] K3: verifying IF output
Thanks to Iain and the others who responded off the reflector. I plugged in the K3's IF output to the second rig's sub RX input and sure enough heard the same signals. When the Sub-RX was set to 8.215 MHz it appeared that there was about a -1.3 KHz difference between the VFO position that would tune in the signal on the K3 vs via the IF. I imagine this is normal (someone please let me know if it's not). So it appears that I have properly functioning IF output. I have gone through various troubleshooting approaches with the LP Pan (jumpers, levels, etc.) and it still does not appear to be working -- only noise shows up. I have a softrock which works fine w/ both sound cards. I think I'm approaching the end of the troubleshooting I can do (I don't have a sufficient oscilloscope to test the LP-PAN's oscillator), so if anyone has any suggestions for things to try at this point I'd appreciate the advice. Thanks again! 73, Matt NQ6N On Sun, Mar 4, 2012 at 10:50 AM, iain macdonnell - N6ML wrote: > Hi Matt, > > If you have another rig that can receive at 8.215Mhz, connect it to > the K3's IF out, and you should hear the same signal that you hear > from the K3. > > 73, > > ~iain / N6ML > > > > On Sun, Mar 4, 2012 at 10:36 AM, Matt Murphy wrote: > > I'm wondering if anyone could advise on the best way to verify that the > > K3's IF output is present and working properly. I have connected an > LP-PAN > > unit and I have two hypotheses about what might be wrong, one is that > there > > is no IF output and the other is that something is wrong with the LP-PAN. > > I verified that the TMP cable is plugged in properly into the RF board > and > > KXV3 but don't have any other devices which consume the IF output so I > > can't be sure it's actually operating properly. > > > > Suggestions would be much appreciated. > > > > 73, > > Matt NQ6N > > __ > > 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 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] K3: verifying IF output
I'm wondering if anyone could advise on the best way to verify that the K3's IF output is present and working properly. I have connected an LP-PAN unit and I have two hypotheses about what might be wrong, one is that there is no IF output and the other is that something is wrong with the LP-PAN. I verified that the TMP cable is plugged in properly into the RF board and KXV3 but don't have any other devices which consume the IF output so I can't be sure it's actually operating properly. Suggestions would be much appreciated. 73, Matt NQ6N __ 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] firmware feature request
Hello, I recently had the following issue and was wondering if a firmware feature could be added to make it impossible to do what I did: I put up a nonresonant dipole and connected it to the K3. I wanted to test the antenna on 40m so I tuned up with the built-in antenna tuner which obtained a 1:1 (or very close) match. I wanted to verify that the balun I made was not prone to heating up, so I figured I'd put the K3 in tune mode for a a minute or so. About 15 seconds into this, smoke started coming from the K3. Turns out there was too much reflected power and it heated up the filter (blue toroid + capacitors) on the KAT3 which is designed to prevent energy from the IF from being part of the transmitted signal. 40M was apparently close enough to cause this to heat up. I'm wondering if it would be possible to have the firmware prevent excessive reflected power situations (by limiting forward power if the pre-KAT3 SWR is too high) on 40m or any other bands close enough to the IF frequency to cause the filter to heat up (not sure if this is also a risk on 30m). The support I received from Elecraft on this issue was superb. I just figured that I'd put it in as a firmware request b/c I think K3 users may not realize that connecting a nonresonant antenna can be dangerous to the K3 on 40m, and it would seem that the same approach of reducing forward power used to protect the finals could also be used to protect the filter. 73, Matt NQ6N __ 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
Re: [Elecraft] K3 toroid windings
Also I think the manual discourages this b/c many of them have been tuned. On Thu, Feb 16, 2012 at 5:01 PM, KQ8M wrote: > Nitpicking. They don't have to be evenly distributed. > > Tim Herrick, KQ8M > North Coast Contesters > k...@kq8m.com > > K3 Serial #5934 > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Robert G. > Strickland > Sent: Thursday, February 16, 2012 7:30 PM > To: Elecraft > Subject: [Elecraft] K3 toroid windings > > I just received my K3 "kit" and looking at the main RF board I notice > that on some of the toroids the windings are not evenly distributed > around the toroid circumference. Is it okay to move the windings around > to even them out or am I being nitpicking? > > ...robert > -- > Robert G. Strickland, PhD, ABPH - KE2WY > rc...@verizon.net > Syracuse, New York, USA > __ > 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 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 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
Re: [Elecraft] another contesting how-to question
I have a winkeyer USB but still just use N1MM for keying. I have not had any problems with it. I actually prefer the feel of the K3's built-in keyer (for sending by hand), but since sending CW via CAT commands is not supported by N1MM, the winkeyer is the only approach that allows you to adjust one knob to set the computer + paddle speed. Matt NQ6N On Tue, Feb 14, 2012 at 11:08 AM, David Gilbert wrote: > > A lot depends upon your computer and what other apps you are running on > it. I have a five year old quad core Intel machine running Windows XP > and during contests both N1MM and CW Skimmer are often active. I > typically run CW speeds of 28 or 30 wpm and might get one or two minor > stutters throughout the course of a major contest. WinKey is a nice > piece of gear and I've considered buying one myself, but I've never been > able to justify it since I simply don't need it. > > Dave AB7E > > > On 2/14/2012 7:04 AM, Don Wilhelm wrote: > > Tim, > > > > If your keying speed is at 20 WPM or less you can likely get by without > > the Winkeyer, but Windows does not allow the logger application to have > > direct control of the serial port, so there will be some timing > > differences in the keying. At slower speeds it may not be noticeable, > > but as the speed increases, the timing becomes more critical - so use a > > WinKey to solve that problem. > > > > 73, > > Don W3FPR > > > > On 2/14/2012 8:26 AM, Timothy Urban wrote: > >> K3 operator used to work CW contests all manually with a paddle plugged > >> into K3 and a pad of paper, now would like to experiment with an > integrated > >> logging setup where I use a logging program to both log and send cw. > >> > >> Trying to figure out the shortest line from here to there with least > number > >> of software applications, cables, phantom com ports, etc. > >> > >> Can N1MM or other logging program be set up to use my computer's one > RS232 > >> port to log using the vfo freq and to generate and send cw, or do I > need a > >> separate winkeyer USB box? > >> > > __ > > 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 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 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] strange broadcast band harmonics?
I was just tuning around 80m and noticed that my new K3 (SN 6066) seems to be hearing all kinds of broadcast band stations (from the AM broadcast band) on 160, 80, and 40m. My other K3 does not do this at all, even with the same antenna connected, which makes me think something is going wrong. I haven't noticed this before but this K3 is new and has not seen much use. Does anyone have any idea what might be going on? Matt NQ6N __ 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
Re: [Elecraft] SHIFT - LO/HI Cut
Is it possibly on QRQ mode? On Mon, Jan 30, 2012 at 5:23 PM, Tommy Alderman wrote: > In tinkering with my K3 (s/n 4521)(Firmware 4.39) I have somehow managed to > disable the ability to select Lo/Hi Cut and I cannot get SHIFT to shift my > passband in the CW mode. Ironically both SHIFT and Lo/Hi Cut work fine in > other modes, so I feel pretty sure I have a parameter set incorrect. With > the LED's lit for SHIFT and WIDTH, in the CW mode, WIDTH works correct but > when I move my SHIFT control, VFO B display shows 'FC *0.54 (of course > 0.54 > is my pitch setting). > > I have been going through both the K3 manual and Fred's book but so far I > can find nothing that identifies my problem. > > Any help would be greatly appreciated! > > 73, > Tom - W4BQF > > > __ > 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 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
Re: [Elecraft] K3 spurious radiation?
I have noticed that pskreporter.info often spots me on the wrong band as well. I think there must be some glitch in the software. I've never been spotted on the wrong band by the cw skimmer network (that I'm aware of). -Matt NQ6N On Tue, Jan 24, 2012 at 8:49 PM, Gary K9GS wrote: > I've seen this happen before and it has also happened to me. Once I was > on the low end of 40M and the W3LPL skimmer spotted me just below 7100. > go figure. > > If you watch skimmer spots you'll often notice weird things showing up. > One of the JA skimmers regularly spots T2DE on 40M. There is not, to > the best of my knowledge, a station from Tuvalu licensed at T2DE. I've > seen other skimmers spot the same callsign when there was no way there > was a propagation path. > > > > On 1/24/2012 7:08 AM, John/K8AZT wrote: > > I have not been monitoring this mail list much recently so I apologize > if this > > subject has been discussed previously. > > > > I like to monitor the reversebeacon.net website while calling cq or just > > monitoring looking for a qso. Recently I have discovered a situation > which has > > me puzzled and I am hoping someone here might be able to give me some > insight > > what might be happening. > > > > When calling cq (CW) on 7.0 MHz cw, I see several hits on the reverse > beacon > > website on 7.0 MHz, however I have also seen a couple stations allegedly > hearing > > me on 10.1 MHz (2 occurrences) and a station hearing me on 28 MHz bands > (1 > > occurrence). I am hoping this is a problem with the skimmers, but want > to check > > out if there is anything which might not be right with my K3 and/or > antenna > > which might be generating unwanted radiations. At the moment I do not > have > > exact frequencies where I was being monitored. I just thought someone > might > > have a suggestion where do I proceed. > > > > At the moment I do not have access to a frequency analyzer, but hope I > can find > > one to borrow locally. > > > > Thank you for any suggestions/comments anyone in the reflector might > have. > > > > 73, > > John/K8AZT > > K3/ SN 1693 > > __ > > 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 > > > > -- > > > 73, > > Gary K9GS > > Check out K9NS on the web: http://www.k9ns.com > Greater Milwaukee DX Association: http://www.gmdxa.org > Society of Midwest Contesters: http://www.w9smc.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 > __ 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
Re: [Elecraft] Tuning AL-811H
That's the best possible answer. Must have slipped through the cracks b/c I didn't realize there were benefits to tuning using one. On Thu, Jan 19, 2012 at 11:36 PM, David Gilbert wrote: > > My guess is that the answer to that would be yes, since it already exists > as the very first item in the chart of K3 menu options. > > "2 Tone -- Enables built-in 2-tone generator for SSB transmit tests." > > Dave AB7E > > > > > On 1/20/2012 12:13 AM, Matt Murphy wrote: > >> If using a two tone oscillator is the best way to tune a tube amp, would >> it >> be possible for the K3's firmware to generate this? >> >> __ 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
Re: [Elecraft] Tuning AL-811H
If using a two tone oscillator is the best way to tune a tube amp, would it be possible for the K3's firmware to generate this? On Thu, Jan 19, 2012 at 9:37 PM, Sandy wrote: > If you are interested in doing the job totally "right" when using SSB, the > only way to be assured of good linearity in the amplifier, is to use a > two-tone test oscillator fed into the audio input and a monitor > oscilloscope > that gives a trapezoidal test pattern. Yes, I know a lot of people use a > CW carrier to do that and are successful at least some of the time. It is > easy to mistune this way and NOT get good linearity and maximum `PEP output > however. This degrades your signal and often times may disturb QSO's up or > down the band with non-linearity products. > > Cheapest test scope used to be the Heathkit SB-610 which has a built in 2 > tone test oscillator. I think Yaesu and Kenwood also made these as well. > Once you get used to the procedure it is easy and fast and assures a very > clean and potent signal. > > 73, > > Sandy W5TVW > -Original Message- > From: Ian Kahn - Ham > Sent: Thursday, January 19, 2012 9:51 PM > To: elecraft@mailman.qth.net > Subject: [Elecraft] Tuning AL-811H > > I have a question about tuning an AL-811H amplifier with my K3. When I > used my FT-857D in the shack, I would tune to the antenna in FM mode. > However, I don't have the FM filter on my K3. I tried tuning the amp > using AM, but I don't have that filter either. So, what is the best > mode to use that allows me to briefly transmit an uninterrupted carrier > so I can get this amp set up and the settings written down? BTW, after > going through this, the saving for the KPA500/KAT500 will soon begin. > > Thanks everyone for the assist. > > 73, > > --Ian > Ian Kahn, KM4IK > Roswell, GA > km4ik@gmail.com > K3 #281, P3 #688 > > __ > 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 > > > - > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.1901 / Virus Database: 2109/4754 - Release Date: 01/19/12 > > __ > 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 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
Re: [Elecraft] K3 Cw Filter Choices
I recommend the 1KHz over the 400Hz filter (if you're going to get one filter) b/c without it you get a lot more IMD when you set the DSP width anywhere above 400Hz. In a contest during a run I like to set the DSP bandwidth to 600-800Hz. If someone is closer than 300-400Hz +- from my frequency, I want to know about it since not all contest participants are using K3s and I don't think it's safe to assume that all would-be calling stations will be able to copy me if the station 350Hz away is very loud and I'm not. Since the output of the roofing filter is the input to the DSP, the DSP is able to do a much better job at 500Hz if you have the 1KHz roofing filter installed than if you just have a 2.x KHz filter installed. Ideally you'd have one narrow roofing filter as well, but unless you anticipate doing most of your operating with the width set to less than or equal to 400Hz, I think your overall experience will be better with the 1KHz roofing filter + DSP. On Thu, Dec 15, 2011 at 10:02 AM, Dave Hachadorian wrote: > I like the 250, which is actually 370. I told the K3 it was 400, > so the filter is switched in at DSP BW 400. It works great on CW > and is perfect for RTTY. > > The 400 is another good choice. It is actually 435, so there's > not much difference between 370 and 435. > > > Dave Hachadorian, K6LL > Yuma, AZ > > > > -Original Message- > From: pastor...@verizon.net > Sent: Thursday, December 15, 2011 9:17 AM > To: elecraft@mailman.qth.net > Subject: [Elecraft] K3 Cw Filter Choices > > Good Morning, when I initially purchased the K3 I only had SSB > filters put into the radio. Which is currently the 2.7 and 1.8. > Would like to get back into CW and I was wondering which CW > filter would be good for that purpose. Any help would be much > appreciated. Thanks!! Mark KB3Z > >-- >Sent using Verizon.net Mobile > __ > 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 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 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
