Re: [Elecraft] K3 ATU Problem
HI, After a bit of button pressing I have noticed the following: When doing a first tune using the internal ATU the tuning power is a set 5W. Immediately doing an extended tune the tuning power toggles to 10W. It does indeed flash up in the VFO B window whilst tuning is in progress. This is in no way controlled by any power level set by CONFIG>TUN PWR. My CONFIG>TUN power setting is 18W which I use to preset my Acom 1000 amp tuning. Regards, Mike VP8NO On 08/12/2021 15:42, Rick NK7I wrote: PS When using the tuner in the KPA1500 with the K3, it gets the 10 watts that I have as my default. I've not tested to see if that can be changed to any other value. I also attempted an ATU tune on the K3 into a dummy load, it's too fast for power to be displayed. ;-) 73, Rick NK7I On my K3, (Tech Mode on, just for clarity): Config | TUN PWR is set at 10.0 watts. If I want it set at another level, I turn the main VFO knob to set that level. I just tested that into a dummy load after setting the output per above to 9 watts and got 9 watts out (since reset to my default, 10). 73, Merry Christmas, Rick NK7I On 12/8/2021 8:34 AM, Tom Boucher wrote: *You can set TUN PWR in the K3 Config Menu to something other than 5 watts.73,DrewAF2Z* Drew, Page 60 of K3 Owner's Manual states: "TUN PWR Note 1: *TUN PWR* does not pertain to *ATU TUNE, *which always uses 5 or 10 W and is internally controlled" Does anyone know how to change the 'internal control' to increase from 5 W to 10 W? 73, Tom G3OLB __ 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 ATU Problem
On my K3, (Tech Mode on, just for clarity): Config | TUN PWR is set at 10.0 watts. If I want it set at another level, I turn the main VFO knob to set that level. I just tested that into a dummy load after setting the output per above to 9 watts and got 9 watts out (since reset to my default, 10). 73, Merry Christmas, Rick NK7I On 12/8/2021 8:34 AM, Tom Boucher wrote: *You can set TUN PWR in the K3 Config Menu to something other than 5 watts.73,DrewAF2Z* Drew, Page 60 of K3 Owner's Manual states: "TUN PWR Note 1: *TUN PWR* does not pertain to *ATU TUNE, *which always uses 5 or 10 W and is internally controlled" Does anyone know how to change the 'internal control' to increase from 5 W to 10 W? 73, Tom G3OLB __ 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 rick.n...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 ATU problem
If an ATU tune finishes like that, with --, then it did not find a match! (and will be in a random state). You don't have enough power for a successful Tune. Try running the TX gain calibration with the K3 Utility. Or, with a dummy load, ATU in BYP, make sure TUN PWR is at "nor", then set pwr to 5.0 watts exactly and long press XMIT to send a carrier for several seconds. (That will do a manual tx gain cal on that freq). Then engage ATU and do an ATU TUNE and it should find a match. If the TX gain cal fails, something is wrong with the LPA. Keith WE6R Elecraft Tech. __ 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 ATU problem
First thought, is your ATU is in bypass? Is the "ATU" icon showing below the 4th digit of VFO A display? 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County On 1/13/2021 6:43 AM, Eric Rosenberg wrote: When I tap ATU TUNE, I hear the relays clicking, see no output from the radio. The op right corner of the screen shows "--" When I then transit, it appears that the SWR hasn't changed... the tuner hasn't actually done anything, Is there a way to troubleshoot this? Thanks & 73, Eric W3DQ Washington, DC __ 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 ATU problem
Mark, Do you have the correct antenna (ANT1/ANT2) selected (this is a per band setting)? Have you tried it by tuning into a dummy load? If it tunes into a dummy load, then you will likely find your problem in your antenna system. 73, Don W3FPR On 4/20/2018 2:01 AM, Bonjour de Marc ! , F4TXR wrote: Hello everyone ! , I have a problem that suddenly happened, my atu on my k3 does not work more correctly! we can hear him agree, but it's like she does not find him as a result, the ROS remains high, regardless of the bands. Everything else seems to work well Maybe a manipulation to do reset Thank you all for your close cooperation, Mark __ 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 ATU
The ATU mode is stored per-antenna. So you can bypass the ATU for ANT1 and have the ATU in-line for ANT2, or vice-versa. 73, Wayne N6KR On Mar 6, 2015, at 7:45 AM, Gary Gregory vk1zzg...@gmail.com wrote: I wonder if any thought has been given to allow for running the KAT3 on Antenna 1, but have it bypassed on Antenna 2? For me at least, it would allow me to use the KAT3 on antenna 2 and Antenna 1 could stay bypassed and the KAT500 allow me to use 3 antennas on the k3, antenna 1. At the moment i have to manually switch the KAT3 between ON and Bypass. User selectable of course for those who wish to leave it as it is. Gary Vk1ZZ K3, KX3, KPA500-FT, KAT500-FT,P3. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to n...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 ATU tuning improvements
I agree, John, I do find that my K3 does not appear to save its ATU settings and seems to do a complete retune each time I press the ATU TUNE button. 73 de David G4DMP In a recent message, John Oppenheimer j...@kn5l.net writes Will the recent KX3 ATU Improvements also be added to the K3? John KN5L * ATU IMPROVEMENTS: Tapping ATU TUNE now recalls stored LC settings for the current VFO frequency prior to tuning, avoiding auto-tuning from scratch in most cases. -- + - - - - - - - - - - - - - - - - + | David M Pratt, Kippax, Leeds. | | Website: http://www.g4dmp.co.uk | + - - - - - - - - - - - - - - - - + __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 ATU tuning improvements
This is really a great improvement for my KX3 and I would love to see it ported to the K3 if possible. I'm positive that there are many new updates coming for the flagship of the line the K3 to come. There is nothing on the market to compete with it and Elecraft has been the only company that continues firmware upgrades on a regular basis. That alone (firmware updates support) was 90% on my buying decision when I switched from my FTDX-5000MP and now have most every product they sell. Firmware has slowed for the K3 but I'm sure it has not reached its peak for sure I will be waiting for more soon. 73, Fred/N0AZZ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Pratt Sent: Friday, August 23, 2013 12:29 PM To: John Oppenheimer Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 ATU tuning improvements I agree, John, I do find that my K3 does not appear to save its ATU settings and seems to do a complete retune each time I press the ATU TUNE button. 73 de David G4DMP In a recent message, John Oppenheimer j...@kn5l.net writes Will the recent KX3 ATU Improvements also be added to the K3? John KN5L * ATU IMPROVEMENTS: Tapping ATU TUNE now recalls stored LC settings for the current VFO frequency prior to tuning, avoiding auto-tuning from scratch in most cases. -- + - - - - - - - - - - - - - - - - + | David M Pratt, Kippax, Leeds. | | Website: http://www.g4dmp.co.uk | + - - - - - - - - - - - - - - - - + __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2242 / Virus Database: 3211/6102 - Release Date: 08/23/13 __ 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) ATU Beeps
Hi Joel, That is documented under Switch Tones. Check out section 2.6.1 on page 32 and the SW TONE config menu on 283. Sorry it wasn't in the index under ATU or KAT3 tones. Cheers and 73, Fred KE7X Fred Cady The Elecraft K3: Design, Configuration, and Operation 2nd Ed The Elecraft KX3 - Going for the Summit www.ke7x.com www.lulu.com (20% discount code for July is JULYBOOKS13) fcady at ieee dot org -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft- boun...@mailman.qth.net] On Behalf Of Joel Black Sent: Tuesday, July 02, 2013 4:15 AM To: elecraft Subject: [Elecraft] (K3) ATU Beeps Can someone point me in either the manual or the Fred Cady book where the different beeps issued by the ATU are discussed? I have searched both manuals and googled it, but I cannot find anything that explains the different beeps. 73, Joel - W4JBB __ 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) ATU Beeps
Check the K3 Manual looking under the Menu Function descriptions for SW TONES. It tells all. 73, Ken K3IU ~ On 7/2/2013 6:14 AM, Joel Black wrote: Can someone point me in either the manual or the Fred Cady book where the different beeps issued by the ATU are discussed? I have searched both manuals and googled it, but I cannot find anything that explains the different beeps. 73, Joel - W4JBB __ 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) ATU Beeps
Fred, Thanks for this, but I still cannot find what I'm looking for. Sometimes, when I hit ATU, I get a short beep. Sometimes it's a bit longer (at least 2x if not 3x longer). I cannot find anything on the length of beeps. I do not have anything connect to ANT 2 - I do all my switching manually. I have a 6BTV connected to the receiver, but I don't think that has anything to do with it. If the length of beeps is in the manual, I absolutely cannot find it. 73, Joel - W4JBB On 7/2/13 7:14 AM, Cady, Fred wrote: Hi Joel, That is documented under Switch Tones. Check out section 2.6.1 on page 32 and the SW TONE config menu on 283. Sorry it wasn't in the index under ATU or KAT3 tones. Cheers and 73, Fred KE7X Fred Cady The Elecraft K3: Design, Configuration, and Operation 2nd Ed The Elecraft KX3 - Going for the Summit www.ke7x.com www.lulu.com (20% discount code for July is JULYBOOKS13) fcady at ieee dot org -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft- boun...@mailman.qth.net] On Behalf Of Joel Black Sent: Tuesday, July 02, 2013 4:15 AM To: elecraft Subject: [Elecraft] (K3) ATU Beeps Can someone point me in either the manual or the Fred Cady book where the different beeps issued by the ATU are discussed? I have searched both manuals and googled it, but I cannot find anything that explains the different beeps. 73, Joel - W4JBB __ 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) ATU Beeps
Ive noticed the same thing. just figured the the long beep was a glitch of some kind as I have not really seen a pattern to long or short beeps after tuning. I haven't noticed a change in pitch as you say on page 30 (first edition) perhaps because its always been able to tune withing a 2:1 David Moes dm...@nexicom.net VE3DVY On 7/2/2013 18:42, Joel Black wrote: Fred, Thanks for this, but I still cannot find what I'm looking for. Sometimes, when I hit ATU, I get a short beep. Sometimes it's a bit longer (at least 2x if not 3x longer). I cannot find anything on the length of beeps. I do not have anything connect to ANT 2 - I do all my switching manually. I have a 6BTV connected to the receiver, but I don't think that has anything to do with it. If the length of beeps is in the manual, I absolutely cannot find it. 73, Joel - W4JBB On 7/2/13 7:14 AM, Cady, Fred wrote: Hi Joel, That is documented under Switch Tones. Check out section 2.6.1 on page 32 and the SW TONE config menu on 283. Sorry it wasn't in the index under ATU or KAT3 tones. Cheers and 73, Fred KE7X Fred Cady The Elecraft K3: Design, Configuration, and Operation 2nd Ed The Elecraft KX3 - Going for the Summit www.ke7x.com www.lulu.com (20% discount code for July is JULYBOOKS13) fcady at ieee dot org -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft- boun...@mailman.qth.net] On Behalf Of Joel Black Sent: Tuesday, July 02, 2013 4:15 AM To: elecraft Subject: [Elecraft] (K3) ATU Beeps Can someone point me in either the manual or the Fred Cady book where the different beeps issued by the ATU are discussed? I have searched both manuals and googled it, but I cannot find anything that explains the different beeps. 73, Joel - W4JBB __ 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 ATU Tune
Phil, The LP-100A (or any external SWR/power measurement device) is not accurate when you are using the KAT3 (K3 internal ATU) since it is on the *output* of the tuner and not the *input*. A tuner *DOES NOT CHANGE THE SWR BETWEEN THE TUNER AND ANTENNA* it only changes the SWR seen by any device looking at the *input* of the tuner. With the KAT3 the *input* to the tuner is inside* the K3. 73, ... Joe, W4TV On 4/23/2012 3:17 PM, Phil Hystad wrote: I am trying to learn the behavior of the K3 ATU Tune. I am switching between two loads. One is dummy load with SWR of about 1.1. The other is a mismatch on an antenna with a measured SWR of about 4.9 (as read off of the LP-100A meter). I am attempting to use the ATU Tune button to bring this unmatched SWR load into a match of 1.5 or under. So, I am getting strange results. I can use my external AT1KM tuner to bring this into a flat 1:1 SWR. If I press the K3 ATU Tune button I also get the 1:1 SWR reading (or close to it, one bar on the K3 SWR display plut the LP-100A reads 1:1). If I switch the tuner out of service (into a bypass mode where the K3 is looking at a 4.9:1 SWR), I use the K3 to hit XMIT briefly and read out the 4.9 SWR. At this point, it looks like I get a fold back on power of about 50 percent (operating at 10 watts so fold back to 5 watts I guess). The next thing I do is switch the AT1KM tuner back into service without changing anything. When I key down I am getting SWR of 1:1 on the LP-100A and the K3 but the power is still folded back. If I hit the K3 Tune button, it quickly tunes and the power is back to full power (or, 10 watts). So, my question --- If the K3 folds back power due to high SWR then is it required to hit the tune button to reset power when you now have a matched load, 1:1 in this case? I hope I have explained the situation, it is a little involved in set up but I ran across this accidentally while measuring some different antenna loads. Also, I am not sure I am reading the SWR on the K3 correctly. If I hit the tune button for one of my antennas (in this case different from above scenario) and NO EXTERNAL TUNER, The K3 tunes and a single bar shows up on the SWR display which I figure is either 1:1 or close to it. But, I have an LP-100A sitting on the output of my K-line (I have a KPA500 in there but it is not on during these tests) and the LP-100A gives an SWR reading of 1.73:1. Who do I believe? The LP-100A was calibrated at the factory (not a kit). Thanks, 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 __ 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 ATU Tune
Phil, Actually you can believe both the K3 and the LP-100A. The KAT3 is inside the K3, and the SWR it reads is that at the INPUT to the tuner. Tuning the internal K3 tuner will *not* change the SWR on the outside of the K3, it will still be whatever you read on the LP-100A - that is the impedance of your antenna or whatever is connected to the LP-100 output. 73, Don W3FPR On 4/23/2012 3:17 PM, Phil Hystad wrote: I am trying to learn the behavior of the K3 ATU Tune. I am switching between two loads. One is dummy load with SWR of about 1.1. The other is a mismatch on an antenna with a measured SWR of about 4.9 (as read off of the LP-100A meter). I am attempting to use the ATU Tune button to bring this unmatched SWR load into a match of 1.5 or under. So, I am getting strange results. I can use my external AT1KM tuner to bring this into a flat 1:1 SWR. If I press the K3 ATU Tune button I also get the 1:1 SWR reading (or close to it, one bar on the K3 SWR display plut the LP-100A reads 1:1). If I switch the tuner out of service (into a bypass mode where the K3 is looking at a 4.9:1 SWR), I use the K3 to hit XMIT briefly and read out the 4.9 SWR. At this point, it looks like I get a fold back on power of about 50 percent (operating at 10 watts so fold back to 5 watts I guess). The next thing I do is switch the AT1KM tuner back into service without changing anything. When I key down I am getting SWR of 1:1 on the LP-100A and the K3 but the power is still folded back. If I hit the K3 Tune button, it quickly tunes and the power is back to full power (or, 10 watts). So, my question --- If the K3 folds back power due to high SWR then is it required to hit the tune button to reset power when you now have a matched load, 1:1 in this case? I hope I have explained the situation, it is a little involved in set up but I ran across this accidentally while measuring some different antenna loads. Also, I am not sure I am reading the SWR on the K3 correctly. If I hit the tune button for one of my antennas (in this case different from above scenario) and NO EXTERNAL TUNER, The K3 tunes and a single bar shows up on the SWR display which I figure is either 1:1 or close to it. But, I have an LP-100A sitting on the output of my K-line (I have a KPA500 in there but it is not on during these tests) and the LP-100A gives an SWR reading of 1.73:1. Who do I believe? The LP-100A was calibrated at the factory (not a kit). __ 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 ATU Tune
About my second question on the different readings of the K3 ATU and the LP-100A. Gosh Darn It -- I knew that. I was not thinking. I had been doing so many different measurements this morning that when that came about (the different readings), I was surprised but it was obviously not a problem. I just repeated the measurement and yes, the raw SWR is 1.73:1 and the K3 Tuned to a flat 1:1 yet the LP-100A is reading the raw SWR. But, actually that was not my main question. The thing that prompted me to ask send the message was the first question about the fold back on power and if it needs the K3 ATU Tune button to be pressed to reset even though the load is well matched and should not fold back at all. 73, phil, K7PEH On Apr 23, 2012, at 12:24 PM, Joe Subich, W4TV wrote: Phil, The LP-100A (or any external SWR/power measurement device) is not accurate when you are using the KAT3 (K3 internal ATU) since it is on the *output* of the tuner and not the *input*. A tuner *DOES NOT CHANGE THE SWR BETWEEN THE TUNER AND ANTENNA* it only changes the SWR seen by any device looking at the *input* of the tuner. With the KAT3 the *input* to the tuner is inside* the K3. 73, ... Joe, W4TV On 4/23/2012 3:17 PM, Phil Hystad wrote: I am trying to learn the behavior of the K3 ATU Tune. I am switching between two loads. One is dummy load with SWR of about 1.1. The other is a mismatch on an antenna with a measured SWR of about 4.9 (as read off of the LP-100A meter). I am attempting to use the ATU Tune button to bring this unmatched SWR load into a match of 1.5 or under. So, I am getting strange results. I can use my external AT1KM tuner to bring this into a flat 1:1 SWR. If I press the K3 ATU Tune button I also get the 1:1 SWR reading (or close to it, one bar on the K3 SWR display plut the LP-100A reads 1:1). If I switch the tuner out of service (into a bypass mode where the K3 is looking at a 4.9:1 SWR), I use the K3 to hit XMIT briefly and read out the 4.9 SWR. At this point, it looks like I get a fold back on power of about 50 percent (operating at 10 watts so fold back to 5 watts I guess). The next thing I do is switch the AT1KM tuner back into service without changing anything. When I key down I am getting SWR of 1:1 on the LP-100A and the K3 but the power is still folded back. If I hit the K3 Tune button, it quickly tunes and the power is back to full power (or, 10 watts). So, my question --- If the K3 folds back power due to high SWR then is it required to hit the tune button to reset power when you now have a matched load, 1:1 in this case? I hope I have explained the situation, it is a little involved in set up but I ran across this accidentally while measuring some different antenna loads. Also, I am not sure I am reading the SWR on the K3 correctly. If I hit the tune button for one of my antennas (in this case different from above scenario) and NO EXTERNAL TUNER, The K3 tunes and a single bar shows up on the SWR display which I figure is either 1:1 or close to it. But, I have an LP-100A sitting on the output of my K-line (I have a KPA500 in there but it is not on during these tests) and the LP-100A gives an SWR reading of 1.73:1. Who do I believe? The LP-100A was calibrated at the factory (not a kit). Thanks, 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 __ 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 ATU Tune
The thing that prompted me to ask send the message was the first question about the fold back on power and if it needs the K3 ATU Tune button to be pressed to reset even though the load is well matched and should not fold back at all. I don't understand this question. If you have engaged the KAT3 and it has been unable to tune the load satisfactorily and the K3 goes into foldback, the load will remain improperly tuned until the KAT3 is tuned again to find a satisfactory set of matching conditions (if such a set exists). If one tunes a mismatched load then substitutes a properly matched load for the mismatched one without readjusting the tuner, the K3 may fold back because the good load is being transformed to a bad one just the way the bad one had been transformed to a good load. I *think* the answer to your question is that the tuner must be bypassed (or adjusted for a 50 Ohm to 50 Ohm transformation) any time you connect a well matched load. If you fail to bypass the tuner, the well matched load is no longer matched to the output condition of the KAT3. 73, ... Joe, W4TV On 4/23/2012 4:08 PM, Phil Hystad wrote: About my second question on the different readings of the K3 ATU and the LP-100A. Gosh Darn It -- I knew that. I was not thinking. I had been doing so many different measurements this morning that when that came about (the different readings), I was surprised but it was obviously not a problem. I just repeated the measurement and yes, the raw SWR is 1.73:1 and the K3 Tuned to a flat 1:1 yet the LP-100A is reading the raw SWR. But, actually that was not my main question. The thing that prompted me to ask send the message was the first question about the fold back on power and if it needs the K3 ATU Tune button to be pressed to reset even though the load is well matched and should not fold back at all. 73, phil, K7PEH On Apr 23, 2012, at 12:24 PM, Joe Subich, W4TV wrote: Phil, The LP-100A (or any external SWR/power measurement device) is not accurate when you are using the KAT3 (K3 internal ATU) since it is on the *output* of the tuner and not the *input*. A tuner *DOES NOT CHANGE THE SWR BETWEEN THE TUNER AND ANTENNA* it only changes the SWR seen by any device looking at the *input* of the tuner. With the KAT3 the *input* to the tuner is inside* the K3. 73, ... Joe, W4TV On 4/23/2012 3:17 PM, Phil Hystad wrote: I am trying to learn the behavior of the K3 ATU Tune. I am switching between two loads. One is dummy load with SWR of about 1.1. The other is a mismatch on an antenna with a measured SWR of about 4.9 (as read off of the LP-100A meter). I am attempting to use the ATU Tune button to bring this unmatched SWR load into a match of 1.5 or under. So, I am getting strange results. I can use my external AT1KM tuner to bring this into a flat 1:1 SWR. If I press the K3 ATU Tune button I also get the 1:1 SWR reading (or close to it, one bar on the K3 SWR display plut the LP-100A reads 1:1). If I switch the tuner out of service (into a bypass mode where the K3 is looking at a 4.9:1 SWR), I use the K3 to hit XMIT briefly and read out the 4.9 SWR. At this point, it looks like I get a fold back on power of about 50 percent (operating at 10 watts so fold back to 5 watts I guess). The next thing I do is switch the AT1KM tuner back into service without changing anything. When I key down I am getting SWR of 1:1 on the LP-100A and the K3 but the power is still folded back. If I hit the K3 Tune button, it quickly tunes and the power is back to full power (or, 10 watts). So, my question --- If the K3 folds back power due to high SWR then is it required to hit the tune button to reset power when you now have a matched load, 1:1 in this case? I hope I have explained the situation, it is a little involved in set up but I ran across this accidentally while measuring some different antenna loads. Also, I am not sure I am reading the SWR on the K3 correctly. If I hit the tune button for one of my antennas (in this case different from above scenario) and NO EXTERNAL TUNER, The K3 tunes and a single bar shows up on the SWR display which I figure is either 1:1 or close to it. But, I have an LP-100A sitting on the output of my K-line (I have a KPA500 in there but it is not on during these tests) and the LP-100A gives an SWR reading of 1.73:1. Who do I believe? The LP-100A was calibrated at the factory (not a kit). Thanks, 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 __ Elecraft mailing list Home:
Re: [Elecraft] K3 ATU question
Hi Ian, Yes. The ATU settings are kept for each band and for each antenna. Each band has multiple segments as shown in Table 6 3 and the ATU will pick the tuning setting for that segment as you tune across the band. This means that the ATU will keep narrowband antennas in tune as you move around in the band. Each time you transmit the microcontroller will see if you have moved the VFO to another band segment and will automatically chose that setting for the L and C in the ATU. You can erase the stored L and C values for any band by tapping CLR when in the CONFIG:KAT3 menu. Your owner's manual also describes this on page 22 also. Fred Cady fcady at ieee dot org The Elecraft K3: Design, Configuration, and Operation www.ke7x.com Lulu 15% discount for the month of September. Enter code AWESOME305 -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft- boun...@mailman.qth.net] On Behalf Of Iain Haywood Sent: Saturday, September 03, 2011 8:50 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 ATU question Hi, Just a quicky, probably been answered but cant find it.. Does the KAT3 have separate settings memory for each antenna input? Im just about to go mobile and wondered if I used the other antenna input I wouldn't mess up all my home antenna settings. -- *Iain Haywood* G4SGX __ 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 ATU
Is the KAT3 necessary for Diverisity operation ? No. What is required is the sub receiver and a separate antenna feeding that. By definition diversity uses two different antennas, feeding independent receivers. The KRX3 comes with a cable that provides for a separate BNC input to the sub RX. The K3 ATU is not required for this. In diversity, one usually uses a horizontally polarized antenna and a vertically polarized one. As the incoming signal experiences polarity shifts as it travels to the receiver, the signal rises and falls at different times in each receiver. I have found that one can get useful fills using two horizontal antennas, arranged at somewhat different heights and orientations as well. 73, Bruce, N1RX __ 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 ATU Question
If you press and hold the tune button it will cycle on and off. Try holding it down once to enable it. Bill K9YEQ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ed G Sent: Monday, November 22, 2010 5:16 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 ATU Question Hi Folks, Maybe I'm missing something very basic (or maybe still in a SS fog), but when I try to use my internal K3 antenna tuner, the display says no ATU. I can go into the config menu and set the tuner to AUTO, and I see ATU on the display, but when I go to actually use the tuner, I can't...display says no ATU. I should say I ordered the K3 with the internal tuner, but until this point haven't tried to use it - I'm assuming it's actually installed ;) I do have the second ANT 2 SO-239 on the rear. --Ed-- __ 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 ATU Question
Try going into the CONFIG: menu and locate with the VFO B knob, KAT3. Rotate the VFO A kjnob until the display says installed. Now close the CONFIG menu and turn OFF the K3. Turn the K3 back on, and you should have ATU function. This is covered in the MANUAL in detail. Remember, however, you MUST cycle the K3 power to make it appear. ...bc nr4c Quoting Bill K9YEQ k9...@live.com: If you press and hold the tune button it will cycle on and off. Try holding it down once to enable it. Bill K9YEQ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ed G Sent: Monday, November 22, 2010 5:16 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 ATU Question Hi Folks, Maybe I'm missing something very basic (or maybe still in a SS fog), but when I try to use my internal K3 antenna tuner, the display says no ATU. I can go into the config menu and set the tuner to AUTO, and I see ATU on the display, but when I go to actually use the tuner, I can't...display says no ATU. I should say I ordered the K3 with the internal tuner, but until this point haven't tried to use it - I'm assuming it's actually installed ;) I do have the second ANT 2 SO-239 on the rear. --Ed-- __ 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 ATU Question
Try cycling power after making the config menu selection. Dick, K6KR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ed G Sent: Monday, November 22, 2010 3:16 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 ATU Question Hi Folks, Maybe I'm missing something very basic (or maybe still in a SS fog), but when I try to use my internal K3 antenna tuner, the display says no ATU. I can go into the config menu and set the tuner to AUTO, and I see ATU on the display, but when I go to actually use the tuner, I can't...display says no ATU. I should say I ordered the K3 with the internal tuner, but until this point haven't tried to use it - I'm assuming it's actually installed ;) I do have the second ANT 2 SO-239 on the rear. --Ed-- __ 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 - ATU Tune
* On 2010 29 Oct 15:45 -0500, L. D. Ingram wrote: Hi, Something curious has happened to my K3 SN 3975 - when I tap the ATU Tune button the power out shown on an external power meter is full power, a little over 100W. The K3 power out indicator also kicks up to full power. I have the unit set to 50W and when I key it normally (CW) it shows 50W on both the external and internal meters. The SWR is fine. Any thoughts on anything I might have done to cause this? What is CONFIG:TUN PWR set to? I have mine set to 025 for 25 Watts which is plenty for me. 73, de Nate -- The optimist proclaims that we live in the best of all possible worlds. The pessimist fears this is true. Ham radio, Linux, bikes, and more: http://n0nb.us/index.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 - ATU Tune
The power level used by the ATU Tune process is internally set to 5/10W. As for the K3 power display, during the tuning process, the scale changes from a max of 100W to a max of 10W. I can't say why your external meter appears to indicate 100W, but is it possible that your meter is auto-ranging and you are misinterpreting it? L. D. Ingram wrote: ...when I tap the ATU Tune button the power out shown on an external power meter is full power, a little over 100W. The K3 power out indicator also kicks up to full power. - 73, Stan - KR7C -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-ATU-Tune-tp5687977p5688375.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
Re: [Elecraft] K3 - ATU Tune
Hi again, Stan KR7C hit it on the head, the external meter is autoranging and the output is 10W not 100 (red face on this). Thanks Stan and others who answered. Larry Ingram AG4NN __ 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 - ATU BYPASS relay/circuitry?
There is no bypass relay as such: http://www.mail-archive.com/elecraft@mailman.qth.net/msg84916.html Bob NW8L On Thu, Jul 1, 2010 at 12:04 PM, GW0ETF gw0...@btinternet.com wrote: Maybe someone can answer this. Still trying to understand the K3 atu and why I still get random high swr readings on some bands into a dummy load; when I switch in BYPASS I hear a relay switching but I've never located this relay *or* the associated BYPASS circuitry on the schematics, ie. I can't work out what BYPASS is actually doing at the circuit level. Anyone know?? Stewart Rolfe, GW0ETF -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-ATU-BYPASS-relay-circuitry-tp5244635p5244635.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 - ATU BYPASS relay/circuitry?
Stewart, If you are driving a dummy load and have the tuner in TUNE, you still have do do a TUNE into the dummy so the ATU remembers the setting for that band segment and into that dummy load. Remember that with the K3 ATU, the bands are segmented, so if you QSY beyond a band segment, you will have to re-tune. 73, Don W3FPR GW0ETF wrote: Maybe someone can answer this. Still trying to understand the K3 atu and why I still get random high swr readings on some bands into a dummy load; when I switch in BYPASS I hear a relay switching but I've never located this relay *or* the associated BYPASS circuitry on the schematics, ie. I can't work out what BYPASS is actually doing at the circuit level. Anyone know?? Stewart Rolfe, GW0ETF __ 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 ATU
This functionality has been in the radio since firmware release 3.03 on March 17th of 2009. Essentially the radio keeps memories of the ATU settings. The spacing of these memories are different depending on what band you're in... 160 - every 10kc 80 through 12 - every 20kc 10 - 50kc 6 - 200kc So in spacings of those whenever you tune your antenna the radio will look for a new value. If it finds something new that value is written into a memory for that segment of the band. So then if you QSY from one band segment to another as soon as you TX the radio will recall your previous tune settings automatically. The blinking of the ATU icon simply tells you that you just loaded a new set of L-C parameters into the ATU. These settings are stored per band and per antenna. Keep in mind that not only are the memories stored that way but the state of the ATU is stored that way. So if you have a resonant antenna on a specific band and a specific antenna port you can have the radio disable the ATU there and it will remember that. However if its not resonant the K3 will remember its tuning across that band and keep things at a low SWR even on very fairly high Q antennas. ~Brett (N7MG) (Previously KC7OTG) On Sun, 2010-05-30 at 07:10 +, Barry Simpson wrote: The ATU has started to behave strangely since I upgraded to the latest firmware. Most times when I start keying after a QSY, there is the click of a relay then the ATU icon goes off momentarily and then returns. Anyone else experiencing this issue ? Barry VK2BJ __ 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 ATU TUNE per band only?
Ok Greg, What I want is for example: I am in 40 mts with ATU ON, I move to other bands and then return to 40 mts and want to have ATU in bypass. I don´t want K3 to remember that ATU was ON in this band. Maybe is an option to say yes/no to remember this point? Thanks, Jorge CX6VM -Mensaje original- De: Greg - AB7R [mailto:a...@cablespeed.com] Enviado el: Jueves, 15 de Abril de 2010 11:01 a.m. Para: 'Jorge Diez - CX6VM' Asunto: Re: [Elecraft] K3 ATU TUNE per band only? Jorge, Just set the ATU to Bypass on the bands (all if that's what you want) and it will remember that setting next time you go back to it. - 73, Greg - AB7R Whidbey Island WA NA-065 On Thu Apr 15 6:58 , 'Jorge Diez - CX6VM' cx6vm.jo...@adinet.com.uy sent: Hello, Actually ATU TUNE is configured per band. Is there any option to have it OFF in all bands and not to be remembered? Something like SPLT SV (yes/no) for the SPLIT mode. But I couldn´t find the same for ATU TUNE. Thanks, Jorge CX6VM -Mensaje original- De: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net','','','')elecraft-boun...@mailman.qth. net] En nombre de Ted Roycraft Enviado el: Miércoles, 07 de Abril de 2010 01:11 p.m. Para: Richard Zwirko CC: elecraft@mailman.qth.net Asunto: Re: [Elecraft] K3 Split option idea That option to save the split state per band is already there. Turn SPLT SV to YES. 73, Ted, W2ZK On 4/7/2010 12:01 PM, Richard Zwirko wrote: I wonder what other K3 users think about having this SPLIT option available on the K3. Like many K3 users, chase DX stations and DXpeditions. Many of them working split, listening on a different frequency. With many radios that I have used, when a band switch is made, not only are both the 'A' and 'B' VFO FREQUENCIES stored for each band, but they also retain the SPLIT /NON-SPLIT conditions for that band. When chasing multiple DX stations, often switching between between bands, I have to remember to hold in the SPLIT button each time I change between bands. If I forget, I get 'reminded' by the KHz Cops. Am I the only one? Would it be possible to allow K3 users to have the capability of retaining the SPLIT condition on each band, if desired, with a menu option? If there is concern about accidentally going back to a band and forgetting that the radio is still in the split mode, how about having a blinking SPLIT icon? I know that the blinking SPLIT icon is used to warn of the 2 VFOs being set to different modes and that the yellow LED is on when there is a difference between RX and TX frequencies. How about the idea of the SPLIT icon blinking when the K3 is in the SPLIT mode on instead. Thoughts/Comments? 73, Rich - K1HTV __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: Elecraft@mailman.qth.net','','','')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: Elecraft@mailman.qth.net','','','')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: Elecraft@mailman.qth.net','','','')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 ATU TUNE per band only?
K3 remembers whether ATU is engaged or bypassed per ANT1/ANT2 per band, and remembers L/C settings per band. You are asking it specifically to return to bypass when you leave a band? It's not like you have to do some complicated thing down in the menus. Front panel button HOLD ATU TUNE toggles from bypassed to engaged, and the current state is plainly shown (ATU showing on the display means it's engaged). Some have asked for ATU to drop out if an amp is in-line, but I've not heard of that being taken up. Current K3 behavior is pretty standard. 73, Guy. On Thu, Apr 15, 2010 at 10:18 AM, Jorge Diez - CX6VM cx6vm.jo...@adinet.com.uy wrote: Ok Greg, What I want is for example: I am in 40 mts with ATU ON, I move to other bands and then return to 40 mts and want to have ATU in bypass. I don´t want K3 to remember that ATU was ON in this band. Maybe is an option to say yes/no to remember this point? __ 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: ATU but a bigger version
Phil, I have privately requested the same as you suggest. Since there is already a full market of amps... would love to have the auto tuner to work with my THP HL-2.5. The THP auto tuner doesn't quite have what I would like. Even better, I would like a totally remote Elecraft tuner which works at/near the antennas. There are a couple out there, but the cost is amazing for the complicated wiring to them. Would be nice to be fully remote. I did that with an MFJ 994, which worked ok up to 600 watts, but not legal limit. 73, Bill K9YEQ K2 KX1 (Field tester); K3; W2; mini mods -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Hystad Sent: Monday, January 25, 2010 11:03 PM To: Elecraft Discussion List Subject: [Elecraft] K3: ATU but a bigger version I really like the way that the K3 ATU works. It has that nice push my button and I will tune for you feel to it. But, it is so small. OK, kind of kidding here but it would be nice to have a big legal limit version of this tuner. Sure, a separate bigger box container. I don't really like some of the auto-tuners that I have seen that are in automatic mode and retune behind the scenes (so to say). I like to have some control over my auto-tuner. So, is there any hope that Elecraft might someday build a big 1500 watt capable ATU along the same style as the ATU in the K3? Knowing Elecraft, it would be highly configurable with firmware controlled features and options. And a kit version too of course. 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 __ 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: ATU but a bigger version (Bill K9YEQ)
Hi, in fact there is no suitable remote legal power limit ATU on the market provides all required functions and capabilities. I am looking for it for long years. Even overpriced gears available are just stupid unusable boxes unfortunately so I agree that something as You are talking about capable to handle more than 1HP (horse power) is highly wanted. 73 - Petr, OK1RP __ 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: ATU but a bigger version (Bill K9YEQ)
Petr, Even though I am the one who started this thread with my question, I need to find out your opinion about the new Palstar Auto Tuner. It is pretty good from what I read and if you read the reviews they are mostly very good. Apparently there had been a few new product type quirks that were overcome by new firmware updates. If nothing is forthcoming from Elecraft as far as news of a product, I will probably buy the Palstar. 73, phil, K7PEH On Jan 26, 2010, at 9:22 AM, Petr Ourednik wrote: Hi, in fact there is no suitable remote legal power limit ATU on the market provides all required functions and capabilities. I am looking for it for long years. Even overpriced gears available are just stupid unusable boxes unfortunately so I agree that something as You are talking about capable to handle more than 1HP (horse power) is highly wanted. 73 - Petr, OK1RP __ 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: ATU but a bigger version
I understand that the announced 2K-FA amplifier from SPE will have the option for remote ATU and antenna switch. Here is the link for the English brochure: http://www.radio-ham.eu/download/Leaflet%20Expert%202K-FA%20inglese.pdf 73 Reinaldo, YV5AMH -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill K9YEQ Sent: Tuesday, January 26, 2010 11:57 To: 'Phil Hystad'; 'Elecraft Discussion List' Subject: Re: [Elecraft] K3: ATU but a bigger version Phil, I have privately requested the same as you suggest. Since there is already a full market of amps... would love to have the auto tuner to work with my THP HL-2.5. The THP auto tuner doesn't quite have what I would like. Even better, I would like a totally remote Elecraft tuner which works at/near the antennas. There are a couple out there, but the cost is amazing for the complicated wiring to them. Would be nice to be fully remote. I did that with an MFJ 994, which worked ok up to 600 watts, but not legal limit. 73, Bill K9YEQ K2 KX1 (Field tester); K3; W2; mini mods -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Hystad Sent: Monday, January 25, 2010 11:03 PM To: Elecraft Discussion List Subject: [Elecraft] K3: ATU but a bigger version I really like the way that the K3 ATU works. It has that nice push my button and I will tune for you feel to it. But, it is so small. OK, kind of kidding here but it would be nice to have a big legal limit version of this tuner. Sure, a separate bigger box container. I don't really like some of the auto-tuners that I have seen that are in automatic mode and retune behind the scenes (so to say). I like to have some control over my auto-tuner. So, is there any hope that Elecraft might someday build a big 1500 watt capable ATU along the same style as the ATU in the K3? Knowing Elecraft, it would be highly configurable with firmware controlled features and options. And a kit version too of course. 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 __ 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: ATU but a bigger version
Oh, but the ~$10k. It is a bit much for me. The 2.5k was already a huge bite on top of the loaded K3 I have. 73, Bill K9YEQ K2 KX1 (Field tester); K3; W2; mini mods -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Reinaldo Leandro Sent: Tuesday, January 26, 2010 12:39 PM To: 'Elecraft Discussion List' Subject: Re: [Elecraft] K3: ATU but a bigger version I understand that the announced 2K-FA amplifier from SPE will have the option for remote ATU and antenna switch. Here is the link for the English brochure: http://www.radio-ham.eu/download/Leaflet%20Expert%202K-FA%20inglese.pdf 73 Reinaldo, YV5AMH -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill K9YEQ Sent: Tuesday, January 26, 2010 11:57 To: 'Phil Hystad'; 'Elecraft Discussion List' Subject: Re: [Elecraft] K3: ATU but a bigger version Phil, I have privately requested the same as you suggest. Since there is already a full market of amps... would love to have the auto tuner to work with my THP HL-2.5. The THP auto tuner doesn't quite have what I would like. Even better, I would like a totally remote Elecraft tuner which works at/near the antennas. There are a couple out there, but the cost is amazing for the complicated wiring to them. Would be nice to be fully remote. I did that with an MFJ 994, which worked ok up to 600 watts, but not legal limit. 73, Bill K9YEQ K2 KX1 (Field tester); K3; W2; mini mods -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Hystad Sent: Monday, January 25, 2010 11:03 PM To: Elecraft Discussion List Subject: [Elecraft] K3: ATU but a bigger version I really like the way that the K3 ATU works. It has that nice push my button and I will tune for you feel to it. But, it is so small. OK, kind of kidding here but it would be nice to have a big legal limit version of this tuner. Sure, a separate bigger box container. I don't really like some of the auto-tuners that I have seen that are in automatic mode and retune behind the scenes (so to say). I like to have some control over my auto-tuner. So, is there any hope that Elecraft might someday build a big 1500 watt capable ATU along the same style as the ATU in the K3? Knowing Elecraft, it would be highly configurable with firmware controlled features and options. And a kit version too of course. 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 __ 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: ATU but a bigger version (Bill K9YEQ)
Dean, thank You very much for Your nice tip. Unfortunately this unit is able to handle 600W key down and mainly the most important antenna's switch is not presented at all. So if will decide for an investment into the remote controlled ATU then definitely I need to serve more than single antenna. Best regards, 73 - Petr, OK1RP On Tue, 26 Jan 2010 09:58:10 -0800, Dean Cookson dean.cook...@gmail.com said: This: http://www.hamware.de/hardware/tuner615U/at615u-d.htm looks somewhat promising... (Google translate does a good-enough job with the German) 73, Dean - W6GS On Tue, Jan 26, 2010 at 9:22 AM, Petr Ourednik indi...@xsmail.com wrote: Hi, in fact there is no suitable remote legal power limit ATU on the market provides all required functions and capabilities. I am looking for it for long years. Even overpriced gears available are just stupid unusable boxes unfortunately so I agree that something as You are talking about capable to handle more than 1HP (horse power) is highly wanted. 73 - Petr, OK1RP __ 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: ATU but a bigger version
Oh yes! I find the K3 ATU just amazing and have often thought how terrific it would be to yank it out of the box and put it outside - and - how REALLY nice it would be to have it scaled up to handle at least 600 watts or even the legal limit - and - work seamlessly with the K3 - and - perhaps a KPA800/1500 (not to start up the we want our amplifiers thread - again!). - Actually, I'd settle for a KPA500 but that's another story! Put me in coach, I want a Big Boy K3 ATU! '73 es gud dxing -- Don N4HH K3/100 #83, etc! --- On Tue, 1/26/10, Phil Hystad k7...@comcast.net wrote: From: Phil Hystad k7...@comcast.net SNIP I really like the way that the K3 ATU works. It has that nice push my button and I will tune for you feel to it. SNIP __ 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: ATU but a bigger version (Bill K9YEQ)
I've been using a MFJ-998 with my K3/ALS-600 for almost two years now. Works great. I also used it with an ALS-1300 that I had here for about two months, and the MFJ-998 easily handled the higher power of the ALS-1300. The MFJ-998 is primarily used with my 43-foot vertical on all bands. I do have base matching on 160/80 meters, but just the unun interface on 40-10 meters. Phil - AD5X __ 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 ATU tutorial help
You have to manually tune it throughout the band for it to learn the settings to be recalled. You can either do this by tuning about every 20kc or you can download K3_EZ and then you can click a button and it will automatically do the tuning for you. It just tunes qsy's tunes qsy's again until its done the whole band for you... You can download K3_EZ here: http://home.roadrunner.com/~n2bc/SW.htm If you want to read more about the tuner's features you can find that in the software release notes: http://www.elecraft.com/K3/hfwnotes.rtf In that document you'll see the features of the tuner that were added in version 3.03. I highly recommend that you read through that document in its entirety as there are quite the number of features that are only documented there for the most part. Or perhaps also download the manual errata as many of the features have probably been added to that document. I've pasted the new KAT3 features below New ATU (KAT3) Features * MULTIPLE KAT3 ATU DATA SEGMENTS PER BAND/PER-ANT.: 10 kHz per segment on 160 m; 20 kHz on 80-12 m; 50 kHz on 10 m; 200 kHz on 6 m. This keeps narrowband antennas in tune across the full ham band.Note 1:You do nothave to go through each band and do ATU TUNE on every segment. The K3 will use the saved LC data segment closest to your present VFO location. Note 2: You can erase all of the stored LC data for a given band by tapping CLR in the CONFIG:KAT3 menu entry. * AUTOMATIC KAT3 LC NETWORK UPDATE ON TRANSMIT: Each time you transmit, the K3 first determines whether you’ve moved the VFO closer to another stored ATU data segment. If so, it will re-load the KAT3 with this data, and flash the “ATU” icon twice, briefly. You’ll hear one or more relays on the KAT3 change state. This will not interrupt transmit. * ATU MODE STORED PER-BAND, PER-ANTENNA: You can now set up the KAT3’s mode (AUTO, BYPASS, etc.) on a per-band/per-antenna (1/2) basis. This is very useful if you have well-matched antennas on some bands, or a dummy load connected to one of the ANT jacks. On Fri, 2009-08-21 at 00:25 -0400, Charles Johnson wrote: I have just installed the ATU in my K3 and can't seem to find an explanation or tutorial on how it should be operated. I am used to the ICOM tuners and they automatically retuned and recalled settings as you changed frequencies and bands. The K3 ATU seems to recall previous settings, but only if I first manually force it to tune on a particular frequency. I must be missing something, but the manual or the K3 web site has almost no information on how the tuner is supposed to function. I have also searched the archives of this reflector, but the subject doesn't seem to be addressed anywhere. Maybe my new tuner is broke? Just how automatic is this tuner? Is there some process I have to go through to help the tuner 'learn'. I have it set up in the CONFIG menu, but it just doesn't work quite like I expected it to. Thanks, Charlie __ 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 ATU BYPASS
Bill Johnson wrote: I have checked the manual and archives before asking this question; is the ATU out of circuit when the BYP is enabled, or are the last settings for lowest SWR left in? Neither. It's set to compensate for internal stray reactances for the best match to a 50-ohm load. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco __ 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 ATU readout
Ralph Tyrrell wrote: Wayne gave us a way to read out what the ATU settings. Does anyone have the formula or formulae for using CT or CA and the L and C values to determine the impedance presented to the ATU? Had the same idea: Using my K3's ATU settings to determine the impedance of my antenna. The formula is easy. But besides L, CA or CT and the frequency, it contains the TX output impedance, which probably differs from 50+j0 ohms. Any opinions? Markus -- View this message in context: http://n2.nabble.com/K3-ATU-readout-tp2441197p2441471.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
Re: [Elecraft] K3 ATU readout
Wayne gave us a way to read out what the ATU settings. Does anyone have the formula or formulae for using CT or CA and the L and C values to determine the impedance presented to the ATU? The K3 tuner looks like an L network with series L and shunt C that is placed either on the antenna side or transmitter side of the inductor. When the shunt capacitance is on the antenna side the impedance of the antenna is higher than 50 ohms. When it is on the transmitter side the antenna is showing less than 50 ohms. Right now I show on my K3 CA = 0.16 nF and L = 0.70 uH, I am matched at frequency of 7.025 MHz. I now start cheating and use a program called L TUNER at: http://www.smeter.net/feeding/l-network-terminating-impedance.php I click on the L TUNER link and run the program (does not require installation) and choose the topology (series inductor shunt capacitance on the output or right side, network #1). I would choose network #3 if my capacitance value was on the transmitter side. I then enter the inductance of 0.7 uH, capacitance of 160 pF (convert from nF shown on K3). Enter generator impedance (K3 transmitter) of 50 Ohms. And now enter frequency of 7.025 MHz. And the program computes the following values for the terminating impedance of the network assuming a proper conjugate match to the 50-Ohms resistive load of the transmitter: Series Resistance R = 67.9 Ohms Series Reactance X = -8.8 Ohms Mike Scott - AE6WA Tarzana, CA (DM04 / near LA) NAQCC 3535 K3-100 #508 / KX1 #1311 __ 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 ATU readout
I've not tried it yet, but this program might do it: http://newsgroups.derkeiler.com/Archive/Rec/rec.radio.amateur.homebrew/2005- 08/msg00101.html The descriptions says: Occasionally it may be useful to deduce the value of the terminating impedance of an L-match network when only the values of the coil (uH) and capacitor (pF) and the frequency are known. Program L_NETWK does exactly that. Ron AC7AC -Original Message- Ralph Tyrrell wrote: Wayne gave us a way to read out what the ATU settings. Does anyone have the formula or formulae for using CT or CA and the L and C values to determine the impedance presented to the ATU? Had the same idea: Using my K3's ATU settings to determine the impedance of my antenna. The formula is easy. But besides L, CA or CT and the frequency, it contains the TX output impedance, which probably differs from 50+j0 ohms. Any opinions? Markus __ 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 ATU readout
Please keep in mind that the L C display tells what is selected in the matching network. There are stray capacitances and inductances on the PC board. If the indicated inductance or capacitance are very low, or the matched impedance is highly reactive, these strays may be significant. Enjoy! 73, Lyle KK7P __ 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 - ATU/Bypass Ant1/Ant2
David Wilburn wrote: I have recently had the need to use the internal antenna tuner on one antenna and to bypass it on the other antenna. I haven't been able to find a way to do this. I am on the latest beta firmware. I was under the impression that something had been changed in this matter. No, I'm afraid not. The only way to avoid having to go into the menu to switch in/out the ATU is to tune it up into a 50 ohm load on that output and then avoid pressing the ATU TUNE button on that band. Easier said than done in my case... - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.ham-directory.com/ Ham Directoryhttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3---ATU-Bypass-Ant1-Ant2-tp1474305p1474357.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 ATU
Chris, The KAT3 (like other Elecraft tuners) is an L network type tuner, and should provide good efficiency. For your particular situation, I suggest that you use something like the TLW application (from www.arrl.org) and calculate the L network configuration needed for your impedance range. TLW will also give you efficiency numbers. The 'fact of life' that deals with added loss due to signal routing on the PC board should be minimal, but if you add 5 or 10% additional loss to account for the physical mounting of the components, you should be 'in the ballpark'. Yes, you will have to know the reactance before you can obtain the really correct answer. L network tuners are generally more efficient than the common Tee type tuners, but I am generalizing here, and exceptions are always present. The PI network is typically efficient too, but the output capacity required becomes very large at low impedances. If you want real efficiency, consider a link coupled tuner (like the Johnson Matchbox), but you sacrifice convenience for improved efficiency figures - the link coupled tuner does not lend itself well to bandswitching or to an auto-tuning application except over a very limited range (one ham band or less). 73, Don W3FPR Chris G3SJJ wrote: Does anyone have any figures on efficiency of KAT3 for load impedances of 20 and 200 ohms? (reactance not known at this stage.) Chris G3SJJ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 ATU specifications
I've been fairly amazed at the ability of the built-in tuner. I've been playing with some indoor aerials fed straight from the PL259 with ladder line, no balun, no additional matching units, straight to the strange aerials I am playing with. This pays no regard for fields induced nearby or other emc issues, but it works a lot better than I anticipated. I am also upstairs away from real ground with no separate earth and an isolated dc supply. It's a temporary arrangement until I get myself properly set up, but amazing results. Running 100W into a *very* short end-loaded dipole. Worked ssb into Germany from York UK last Sunday afternoon, first shout. He had a delta loop which I suspect did most of the work, but my antenna tuned up just fine. I also have a very low (10 to 15ft) 176ft doublet which it *tunes* from 160 to 10. Sometimes I tap the tune button twice to get finer tuning. I normally advise that the feed to an antenna should be away from the house, in which case the external tuner would be the way to go to avoid emc problems within the house. David G3UNA K3 #547 Greetings everyone, I'm trying to debate whether or not to pickup an external LDG tuner or just go with the K3 built-in ATU. Does anyone know the tuning specifications of the ATU? I need a tuner that will hopefully tune every band to = 1.5:1 on a Cobra multiband dipole antenna. The built-in ATU in my TS-850 has difficulties with certain frequency ranges within a couple of bands. Should I go with the built-in K3 ATU, or remove that from my order and just pickup an a decent external LDG tuner? Any advice would be greatly appreciated. Thanks! - Bill, kb1pxd -- - Email sent from www.virginmedia.com/email Virus-checked using McAfee(R) Software and scanned for spam ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 ATU specifications
Go with the KAT3 - not only does it tune an awful lot of weird stuff, it remembers it and will just switchs to its known state for that band. It's internal, so no need for an additional ext unit, external power etc. This is the same ATU as the KX1/K2, only better as far as I can tell (I don't have either a KX1 or K2, but I have friends who do). If you find it can't tune your antenna, I'm pretty sure nothing else will. Conversely, I'm sure that if an LDG tuner will, the KAT3 will to (again, I don't have an LDG to check). 73 de M0XDF, K3 #174 -- Math Anxiety: an intense lifelong fear of two trains approaching each other at speeds of 60 and 80 MPH. -Rick Bayan On 10 Apr 2008, at 11:41, KB1PXD wrote: Greetings everyone, I'm trying to debate whether or not to pickup an external LDG tuner or just go with the K3 built-in ATU. Does anyone know the tuning specifications of the ATU? I need a tuner that will hopefully tune every band to = 1.5:1 on a Cobra multiband dipole antenna. The built-in ATU in my TS-850 has difficulties with certain frequency ranges within a couple of bands. Should I go with the built-in K3 ATU, or remove that from my order and just pickup an a decent external LDG tuner? Any advice would be greatly appreciated. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 ATU specifications
Go with the KAT3 - not only does it tune an awful lot of weird stuff, Also, as with every tuner, there is a certain range of Z which the K3 tuner will not be able to match. In the few cases where this has been a problem with my K3, changing the length of the feed line by a meter or so has always helped. vy 73 de toby ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 ATU specifications
I have a Cobra Ultralite antenna and the KAT2 tuner in the K2 finds a match on all bands (with a BL2 in the 4 to 1 position). The K3 ATU is a similar type of tuner. The great thing about the built-in tuner is that it remembers the settings for each band which makes changing bands very easy. This is extremely convenient. Most external auto tuners need some RF power before they remember the settings for that frequency range. You also may want to add or subtract some feedline length to help out those problem bands. I added 18 feet to the feedline and this brought all bands (including WARC, not including 160) within the range of a Johnson Matchbox tuner. I still prefer using the balanced tuner over the unbalanced tuner and balun. But the K3 may change my thinking when it arrives (ordered in December). John W2XS I need a tuner that will hopefully tune every band to = 1.5:1 on a Cobra multiband dipole antenna. The built-in ATU in my TS-850 has difficulties with certain frequency ranges within a couple of bands. Should I go with the built-in K3 ATU, or remove that from my order and just pickup an a decent external LDG tuner? Any advice would be greatly appreciated. -- View this message in context: http://www.nabble.com/K3-ATU-specifications-tp16607551p16608901.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 ATU specifications
Bill Whether the ATU is internal or external is not the question. The real problem is what impedance the feedline presents to the rig on each band. If it is something outrageous, no ATU is likely to tune it. You would be better off borrowing an antenna analyzer from someone and measuring the impedance at the shack end of the feedline to see what an ATU would have to try to match. If it is too unreasonable on some band, you can alter it by changing the length of the feedline, just add another 10 ft or so at the shack end and measure again. Eventually you will find a length for the feedline that will give a workable impedance on all bands and your ATU from whatever source will be happy. Good luck and 73 Bob N6WG - Original Message - From: KB1PXD [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Thursday, April 10, 2008 3:41 AM Subject: [Elecraft] K3 ATU specifications Greetings everyone, I'm trying to debate whether or not to pickup an external LDG tuner or just go with the K3 built-in ATU. Does anyone know the tuning specifications of the ATU? I need a tuner that will hopefully tune every band to = 1.5:1 on a Cobra multiband dipole antenna. The built-in ATU in my TS-850 has difficulties with certain frequency ranges within a couple of bands. Should I go with the built-in K3 ATU, or remove that from my order and just pickup an a decent external LDG tuner? Any advice would be greatly appreciated. Thanks! - Bill, kb1pxd -- View this message in context: http://www.nabble.com/K3-ATU-specifications-tp16607551p16607551.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 ATU specifications
Hi Bill, Several have already responded saying go with the K3 ATU. I would probably suggest the same, but we really don't have much data to go on with regard to your Cobra antenna. I can tell you that the K3's ATU is excellent, and probably will do the job nicely. Presumably your antenna is relatively closely matched on the bands you use it on, but there can always be problems. Multiband antennas tend to have narrow bandwidths on lower bands, like 40 and 80. Trying to work those bands from one end to the other can be a stretch for many ATU's. So I'm not sure anyone can say with 100% confidence that you won't have an issue somewhere. What SWR readings do you get without using a tuner? That might be helpful to know in order to make a more informed judgement on how the K3's ATU would respond. I get full band performance with my K3 or 40 through 6 meters using an R8 vertical. The K3 ATU has no problem. In fact, I can even get a match on 80 meters, which the antenna isn't even supposed to cover! Moreover, I can get a 2:1 match on 160 meters! Having said that, I don't think I'm very efficient on either 80 or 160, and the ATU is not going to make any magic. But it does tell me that the K3 ATU is very, very good at finding a match on difficult situations. In fact, I doubt you will find an internal ATU that works better. So, I think you would be making a good bet by adding the internal ATU. It certainly won't disappoint you provided you give it something reasonable (or maybe even slightly unreasonable) to match. But you have the responsibility of making sure the antenna is within realistic reach of resonance, and not so poorly designed (or installed) that it presents something just too complex for the ATU to deal with. I'd say if you see 5:1 or better without a tuner you are probably safe. And that probably understates the ability of the K3's ATU. But if you see much more than that, you might really need a better antenna! Even though I can get a 2:1 match on 160 with my R8, I'm not going to press my luck by operating there. Clearly the ATU isn't particularly happy, and it's probably struggling excessively. Besides, even though the match seems acceptable, the antenna still sucks on that band. So, bottom line is, get the K3 ATU. If it doesn't deal with your antenna with relative ease, change antennas! Dave W7AQK - Original Message - From: KB1PXD [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Thursday, April 10, 2008 3:41 AM Subject: [Elecraft] K3 ATU specifications Greetings everyone, I'm trying to debate whether or not to pickup an external LDG tuner or just go with the K3 built-in ATU. Does anyone know the tuning specifications of the ATU? I need a tuner that will hopefully tune every band to = 1.5:1 on a Cobra multiband dipole antenna. The built-in ATU in my TS-850 has difficulties with certain frequency ranges within a couple of bands. Should I go with the built-in K3 ATU, or remove that from my order and just pickup an a decent external LDG tuner? Any advice would be greatly appreciated. Thanks! - Bill, kb1pxd -- View this message in context: http://www.nabble.com/K3-ATU-specifications-tp16607551p16607551.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 ATU specifications
Bill, I have the same setup that you are inquiring about. The Cobra is full sized and I am using the full 100' of feed line. The balun is an Amidon W2FMI 4:1 unit mounted outdoors. I used a silicon sealant to weatherproof the enclosure. I usually use different antennas above 7 MHz, but will happily run some tests for you to let you know how well the K3's ATU handles matching chores on all bands. Drop me an e-mail off list to let me know. 73, Joe - W1AIU K3/100 #269 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 ATU Balun question
You brought back an old memory. Many years ago I made a bifilar wound air-core 1:1 balun. I was inspired by the 1974 ARRL Antenna Book, which described it on pg. 102, fig. 3-43(B). Figure 3-43(A) presented a 4:1 balun. On the same page is a photograph of a broadband unit, made of airdux type coil stock in an aluminum housing. I'll quote from the book, which fortunately I still have: In practice, a single set of coils can be designed to work over the 3.5 to 30 MHz range. Design is complicated because there is mutual coupling between turns, which modifies the characteristic impedance. However, suitable units are available commercially (BW 3975). I wound the 1:1 on an old phenolic coil form I had and put it in an upside down pickle jar attached to a post at the feedpoint of a 40 m delta loop. Not a very challenging application - single band and all. The antenna was already matched to a 50 ohm feedline pretty well with a quarter wave section of RG-59, but I wanted to limit currents on the outside of the coax. It didn't seem to make the antenna any worse! Air-core baluns don't get mentioned much anymore, but as you suspected they can be made to work, within certain limits. Bob NW8L On Sun, Mar 16, 2008 at 12:21 PM, Mike Scott [EMAIL PROTECTED] wrote: We had a prior discussion about the use of the K3 ATU driving an antenna on multiple bands fed with open wire feed line with a short length of coax and a Balun on the transceiver end. The discussion mentioned that Baluns have losses when SWR is high and that the proper Balun was 1:1. The Balun losses lead me to think air core and whether the losses could be avoided... Baluns do three things: Transform impedances, transform unbalanced to balanced, force currents to be equal and opposite (current Balun). We don't need impedance transformation as that is what the ATU does, I am not sure we absolutely need common mode choking of the current Balun; it depends on whether asymmetry has been introduced in the doublet or feed line. Is there any problem with using an un-tuned 1:1 air coil transformer with unbalanced primary and balanced secondary? I am thinking back to link coupled transmitter days. Many tuners used a topology like this but they tuned the primary or secondary for impedance matching purposes. Since the ATU is there to match impedances the minimum we need is low-loss unbalanced to balanced conversion. If the Balun core is the primary mechanism for loss generation at high SWR, why not get rid of it? I make my own Airdux style coils. I could wind an Airdux style coil in bifilar fashion (equal number of turns) and feed one winding unbalanced and leave the other winding balanced to connect to the open wire feed line. I am not sure if I am going to get efficient 160M to 6M coupling out of one coil but what is wrong with this picture? Similar construction with different hookup could take the same bifilar coil arrangement and turn it into a 1:1 current Balun if that was a better solution. The coil could go into an outside the window weather proof box. Mike Scott - AE6WA Tarzana, CA (DM04 / near LA) K3-100 #508/ KX1 #1311 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 ATU
Can anyone comment on how robust the internal ATU for the K3 is? Is one better off with an external ATU? I'm not sure what you mean by robust. The KAT3 internal ATU handles the full power of the K3 and matches a wide range of load impedances. It adds little to the weight of the radio, and is fully integrated into the user interface. 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 ATU Tune
This would be nice. I used the tune function that my Icom radios had that keyed them up at 10 watts to activate my SGC antenna coupler. The low power saves the relays as well as reducing interference. I bet it's on the firmware enhancement list already. Dave W5DHM On 9/6/07, Edward Dickinson, III [EMAIL PROTECTED] wrote: Is there an output available for the K3 to key a remote ATU via the Tune feature/button in the absense of an internal ATU? Regards, Dick - KA5KKT/4 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 ATU Tune
I too would like this and rather hope Elecraft have already incorporated it. I have a long wire tuned with an SG237 outside the shack with its coax coming inside. I am planning on continuing to use that when at home (and probably put a 1/2 G5RV on the other Ant in). I currently have an FT-857 and key the rig at 20W via the ACC jack and the 'little brown wire' that tells it I'm on battery power and limits output to 20W. I'm rather hoping something similar will be possible - I know I'll be able to key the K3, just if dropping power with a button press will be possible. On 6/9/07 16:28, Dave Martin [EMAIL PROTECTED] sent: This would be nice. I used the tune function that my Icom radios had that keyed them up at 10 watts to activate my SGC antenna coupler. The low power saves the relays as well as reducing interference. I bet it's on the firmware enhancement list already. Dave W5DHM On 9/6/07, Edward Dickinson, III [EMAIL PROTECTED] wrote: Is there an output available for the K3 to key a remote ATU via the Tune feature/button in the absense of an internal ATU? Regards, Dick - KA5KKT/4 -- Everything secret degenerates, even the administration of justice; nothing is safe that does not show how it can bear discussion and publicity. -Lord Acton, historian (1834-1902) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
