[Elecraft] KX3 For Sale
I've decided to part with my Kx3, in favor of the Kx1 for portable operations. Before I put this up on QRZ, I thought I'd offer it for sale here. It works very well. It's just that I usually find myself on 30 or 40 meter CW and it's far to capable a rig to just use 10% of the features. Besides, I want a new antenna and this will get me there. Yes, it's an expensive antenna! Elecraft KX3 with all the built in options, - KXFL3 Roofing Filter - KXAT3 Antenna Tuner - KXBC3 NiMH Charger/RT Clock - KX3-2M Transverter And these accessories, - MH3 Hand Mic - KXPD3 Paddle - KX3-PCKT Cable Kit Plus the KE7X book, "The Elecraft KX3-Portable", as well as printed owner's and assembly manuals. Excellent condition. Price is $1400.00, includes ground shipping within CONUS Pictures available on request. Payment by PayPal or USPS money order. Thanks for your interest, vy 73, Dave, N4KD __ 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] PR-6 For Sale
I've upgraded my K3 with the KXV3b and don't need the PR-6 any more. It's for sale, with the power cable, for $80. Pictures on request. vy 73,Dave N4KD __ 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] Off topic feedline question
I didn't study this site too deeply, but KP4MD has the most appropriate characteristics on her page, here, http://www.qsl.net/kp4md/zipcord.htm. You might also look at Owen Duffy's pages. His transmission line calculator is great. I think the last entry for zip 105 is zip cord, but you should email him and ask. The page is at http://owenduffy.net/calc/tl/tllc.php vy 73,Dave N4KD On Tuesday, November 7, 2017 9:12 AM, Michael Blake wrote: My 80M antenna is a low, loaded dipole fed with balanced window line. As the center impedance is low the high impedance window line tries to invert the impedance to a much higher value. The feedline is only 25' long and terminates in a 1:1 balun which is then connected to a remote autotuner via 24 inches of 9913F. The question is: Has anyone run any RF loss tests on the commonly available 12 gauge clear PVC insulated "speaker" wire. The impedance would be quite low, probably in the 90 ohm range, and world certainly handle the applied power (500 watts) but I have not been able find any information regarding RF loss. Michael Blake k9...@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 n...@bellsouth.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Radio storage cases
Just an ordinary ESD bag will do? That sounds way too easy. vy 73,Dave N4KD On Wednesday, September 6, 2017 2:52 PM, Bob Novas wrote: http://www.emp-bags.com/ Bob - W3DK -Original Message- __ 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] how to optimize end-fed?
I think 42 might be a valid answer, depending on the question. Forty-one is certainly a good answer! There are a couple pages that try to address the question of what long wire lengths are the easiest to tune, i.e. present a low SWR to the matching unit. The first is at http://udel.edu/~mm/ham/randomWire/ and it's work is derived from what was presented here, http://www.qsl.net/on7dy/Documentation/Best%20%20Random%20Wire%20Antenna%20Lengths.htm Hope this helps a little. With my KX3 tuner, it doesn't seem to matter much what I use for a long wire. The tuner does a good job matching the antenna to the rig. vy 73,Dave N4KD On Friday, September 30, 2016 4:01 PM, Fred Jensen wrote: Let me see if I understand the question: You're looking for a simple algorithm to tell you how to "best" deploy a wire of indeterminate length in a configuration yet to be specified using a transformer of indefinite impedance ratio on any of a number of unnamed bands. This is reminiscent of one of the five volumes in Douglas Adams' trilogy, "The Hitchhikers Guide to the Galaxy." The people build a very powerful computer and then asked it, "What is the meaning of the Universe?" The computer begins to compute, as is the wont of computers, and worked on the problem for a very long time. Finally, it announced that it had determined the answer. By this time, there was no one in the Universe that remembered the original question. When asked for the answer, the computer replied, "Forty Two." Possibly "forty two" would work for you as a rule of thumb? :-)) 73, Fred K6DGW - Sparks NV DM09dn - Northern California Contest Club - CU in the Cal QSO Party 1-2 Oct 2016 - www.cqp.org On 9/29/2016 11:24 PM, Holger Schurig wrote: > Fred Jensen writes: > >> How long is the wire? >> What band? > > Who knowns? I'm not asking for a *specific* optimization, I'm asking > for a general rule of thumb. > > I'm not talking about a permanent installation, I'm talking about going > to some field, or hill. I don't know the band in advance, I don't know > the propagation conditions. And I have several lengths of wire with me, > I can adjust the wire length. And given the circumstances of the > location, even the layout of my wire (only on fiber glass post, between > tree and fiber glass post, etc) will change (e.g. sloper, vertical, > etc). Even the high will be undefined and/or changeable. __ 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...@bellsouth.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Best Coax for Jumpers and Interconnections for SO2R operation with K3 & KX3
So does Davis... http://www.davisrf.com/buryflex.php. I've bought a lot of wire from them. Plus, I like calling them to place the order, rather than filling out an automatic form. vy 73,Dave N4KD On Tuesday, February 23, 2016 5:13 PM, John E Bastin wrote: On Feb 23, 2016, at 16:41, Robert Nobis wrote: > > Thank you. I have heard of Davis RF BuryFlex, but have not seen it offered by > any of the on-line sellers. I assume you purchase direct from the supplier? I > concur with using Amphenol connectors. The Wireman sells Davis RF BuryFlex RG-8, product number 103A. https://thewireman.com/coaxp.html Hope this helps. 73, John K8AJS jbas...@sssnet.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to n...@bellsouth.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Best Coax for Jumpers and Interconnections for SO2R operation with K3 & KX3
Best possible could run into some money. You can get Pasternack to build a 36 in. jumper from RG223 ( double shielded and very small bend radius) for about $35. You can buy the parts for about $22 and DIY. http://www.pasternack.com/showProduct.aspx?SEName=uhf-male-uhf-male-rg223u-cable-assembly-pe3w00408&ProductID= But I think LMR-240 UF is pretty good. It's got a foil and braid shield. It's what I use and I crimp/solder UHF connectors that I get from Max-Gain systems. The sheathing on the bury flex is a little stiffer than I like to deal with. vy 73,Dave N4KD On Tuesday, February 23, 2016 12:12 PM, Robert Nobis wrote: I am in the process of setting up my shack for SO2R operation with my K3 and KX3. Just wondering what the best coax type to use for jumpers and interconnections within the shack? I want to make sure I have the best possible isolation between the two rigs. Thanks and 73, Bob Nobis - N7RJN n7...@nobis.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 n...@bellsouth.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] CQ WPX RTTY Contest
I ran my K3 with the K3IOB upgrade card installed. I also have a P3 and set it to a 10 KHz span. Before, when I used the line out as an input to Fldigi, it seemed like there was a little more tolerance in how I tuned in on the space signal. Now, I notice that the K3 decodes text when I get reasonably close to the space signal, but Fldigi still needs a little more finagling to get it decoding at all. I may be back to using the Xonar sound card and cables unless I can establish a more consistent tuning procedure on the RTTY signals. vy 73,Dave N4KD On Monday, February 15, 2016 12:22 AM, Rick Prather wrote: I used RUMlogNG for WPX and it worked very well. My set up though is a bit different than your's I think. I use the K3 set to FSK D and cocoaModem as a back up. I tune the signals using my P3 set to about 15 Khz span and tune to the Right (space) signal. The only repeats I needed to give didn't surprise me since I am running only 100W to a wire. I found that cocoaModem was slightly better at decoding but most of my decodeing and therefore grabbing call signs, etc. was from the RUMlogNG display with cocoaModem used mostly as an occasional backup. Interestingly enough, I found a few situations, especially on weak and/or fluttery signals, where the K3 did a much better job of decoding than cocoaModem. I also spent some time running FLDIGI on the side but found it was not nearly as good as cocoaModem or the K3 in decoding. Rick K6LE __ 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] APF (audio peaking filter) on the K3/K3S/KX3
Thanks for all the discussion on the APF. I've got a technique now and I think I can refine it into something useful. vy 73,Dave N4KD On Saturday, February 6, 2016 8:02 AM, Chuck Guenther wrote: I've been using APF in my K3 since it was in Beta testing. I love it! I've found it necessary to use both the shift and Fine tuning-- these are not optional for effective use of APF. I've been using macros to engage and dis-engage the APF. One reason I keep combing through the Elecraft Reflector postings is for gems such as Brian's suggestion below. There is always something new to learn. Thanks, Brian. 73, Chuck NI0C KX1, K2-10, K3 Quote: The technique I'm using with the APF also involves NR like so: On an uncrowded band, set the DSP BW to 700 to 1000 Hz. If you have a roofing filter in that range stay within it. Turn on NR set to mF5-3 or there about. The wide BW helps the NR work well. The "mix" mode lets a little unprocessed signal+noise through. This is a good weak signal search mode. When you find a signal you want to copy, turn on APF and peak it in the filter. Fine tuning helps. There is little ringing because NR has reduced the noise amplitude. You can decrease the DSP BW a little but the NR is more effective with uncorrelated noise. This technique has gotten me many pelts in the QRP Fox Hunts. 73, Brian, K0DTJ __ 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...@bellsouth.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3
Thanks. I'll try again and be very careful this time. vy 73,Dave N4KD On Friday, February 5, 2016 10:08 AM, Barry N1EU wrote: The receiver has to be tuned precisely to the signal in question for APF to work. 73, Barry N1EU On Fri, Feb 5, 2016 at 9:53 AM, David Kuechenmeister wrote: > I tried this the other day with no success. That is, the weak signal that > was barely detectable, became so buried in ringing that I couldn't detect > it at all. I think I followed the procedure outlined in Wayne's email > below... > Noise was around S5 on 40m and the K3 was configured with APF active. I > had my 500 Hz filter selected and varied the DSP WIDTH from 500 to 300 > without substantial improvement. FINE tuning selected. > What am I forgetting? > vy 73,Dave N4KD > > On Tuesday, February 2, 2016 9:36 AM, Wayne Burdick > wrote: > > > Hi all, > > This morning I was hearing lots of very weak signals in the 40-meter CW > band, right at today's noise floor of about S-5. (Among others, I copied > BG4GOV in Shanghai.) > > Many of the signals were not copyable until I turned on APF (audio peaking > filter). This filter's center peak is very narrow (around 30 Hz), but the > response broadens out quickly below the 3-dB points in the curve. This > brings up the desired signal without allowing noise to cause > ringing--something often heard with narrow filters of the "brick-wall" > variety. On a noisy band, the effect is just short of magic. > > APF is very narrow, so you'll need to tune in 1-Hz increments when it is > turned on. Also, APF works best when used with a DSP/crystal filter WIDTH > setting of 300-500 Hz. > > Use of APF differs for the three transceivers. > > KX3: 1-Hz tuning is selected automatically on the when the APF switch is > pressed. > > K3/K3S: APF is accessed via a hold of the XFIL switch. This function is > labeled "APF" on a K3S, or "DUAL PB" on the K3). Use CONFIG:DUAL PB to make > sure the selected filter function is APF. See the K3/K3S owner's manual for > a description of the alternate setting. 1-Hz tuning can be selected by > tapping FINE. > > You might want to give APF a try if you haven't already. > > 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 n...@bellsouth.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 n1eu.ba...@gmail.com > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to n...@bellsouth.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] APF (audio peaking filter) on the K3/K3S/KX3
I tried this the other day with no success. That is, the weak signal that was barely detectable, became so buried in ringing that I couldn't detect it at all. I think I followed the procedure outlined in Wayne's email below... Noise was around S5 on 40m and the K3 was configured with APF active. I had my 500 Hz filter selected and varied the DSP WIDTH from 500 to 300 without substantial improvement. FINE tuning selected. What am I forgetting? vy 73,Dave N4KD On Tuesday, February 2, 2016 9:36 AM, Wayne Burdick wrote: Hi all, This morning I was hearing lots of very weak signals in the 40-meter CW band, right at today's noise floor of about S-5. (Among others, I copied BG4GOV in Shanghai.) Many of the signals were not copyable until I turned on APF (audio peaking filter). This filter's center peak is very narrow (around 30 Hz), but the response broadens out quickly below the 3-dB points in the curve. This brings up the desired signal without allowing noise to cause ringing--something often heard with narrow filters of the "brick-wall" variety. On a noisy band, the effect is just short of magic. APF is very narrow, so you'll need to tune in 1-Hz increments when it is turned on. Also, APF works best when used with a DSP/crystal filter WIDTH setting of 300-500 Hz. Use of APF differs for the three transceivers. KX3: 1-Hz tuning is selected automatically on the when the APF switch is pressed. K3/K3S: APF is accessed via a hold of the XFIL switch. This function is labeled "APF" on a K3S, or "DUAL PB" on the K3). Use CONFIG:DUAL PB to make sure the selected filter function is APF. See the K3/K3S owner's manual for a description of the alternate setting. 1-Hz tuning can be selected by tapping FINE. You might want to give APF a try if you haven't already. 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 n...@bellsouth.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Digital Input Pin?
I was looking for a way to automatically reduce power when operating on batteries. It seems like another transceiver I once owned had a pin that, when grounded would reduce output power to conserve batteries. I don't see any handy way to do this with the K3, other than crank down the power... It looks like all the ACC pins are defined, so except for making one of them a programmable I/O pin, I think I'm out of luck. Is there anyone else interested in a programmable input pin that could be tied to a macro command? vy 73,Dave N4KD __ 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] F/S KIO3
I also have finished the KIO3B upgrade to my K3, so my old KIO3 is available. Please make all inquiries off list. vy 73,Dave N4KD __ 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
