[Elecraft] SPLIT
Hi all, need help! Using ver 2.78 ser 2014. Find SPLIT is not working CW or SSB! Was working previously with other versions. Powered up again and reloaded firmware DSP to no avail. SPLT SV YES or no - makes no difference. Checked mode same VFO A and VFO B. Need this for K5D asap!! 73 Colin M0DDT__ 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] Elecraft 70cm transverter, K3 and repeater access tones?
Lyle Johnson wrote: In FM mode, hold PITCH. Select the CTCSS tone with VFO A and enable/disable with VFO B. Got it! Serves me right for looking for CTCSS in the index of the manual. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.g4ilo.com/blog.html G4ILO's Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/Elecraft-70cm-transverter%2C-K3-and-repeater-access-tones--tp2322648p2325698.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] K1 warble
Mike, I installed the tuning pot you suggested and so far so good. It does feel better when tuning and has been pretty stable. Hopefully this will fix the issue. It is quite impressive that you achieved DXCC with the K1, Congratulations and Thanks. 73 Steve Michael Byrd wrote: Steve, I had a similar problem with my K1. The warble you are describing sounds like the issue I had. It became worse after a while and was easier to locate. The tuning pot (10turn) was the original with a plastic shaft. I could jiggle the main tuning knob and recreate the warble in frequency. I replaced mine with Bourns precision 10 turn pot 3540S-1-104 that I got from Mouser. Their part number is 652-3540S-1-104. It has a metal shaft and is much tougher. It was mentioned on the Elecraft list years ago as an upgrade replacement for the original. After I installed the new pot, my problem was gone and the tuning was really smooth. I have been using the radio for several years now with no further problems. I now have DXCC on 40 meters thanks to my K1 and a vertical antenna. 73, Mike AC4UR __ 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: activating sub receiver disables tx ?
Hi Dave I do not have the problem you are experiencing. My K3 works fine in split in transmit with the sub receiver on. I hope you find the problem. 73 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
Re: [Elecraft] SPLIT
Hi Colin, I'm using ver 2.80 and split is working fine here, although I still haven't managed K5D yet. Did you AB before selecting split? Doug GM0ELP Colin Potter wrote: Hi all, need help! Using ver 2.78 ser 2014. Find SPLIT is not working CW or SSB! Was working previously with other versions. Powered up again and reloaded firmware DSP to no avail. SPLT SV YES or no - makes no difference. Checked mode same VFO A and VFO B. Need this for K5D asap!! 73 Colin M0DDT __ 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 -- View this message in context: http://n2.nabble.com/SPLIT-tp2325573p2325781.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] RTTY Dual Passband Filter and RFI?
I'm running two K3s, each into its own Alpha 86 at 1.5 KW. Same configuration at home with 87As. I've never encountered what you describe. Ed - P49X (W0YK) -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft- boun...@mailman.qth.net] On Behalf Of Ron W3ZV Sent: Friday, February 13, 2009 6:41 PM To: Elecraft Subject: [Elecraft] RTTY Dual Passband Filter and RFI? I am working the CQ WPX contest. K3 FL-7000 amp at about 300W. When I engage the dual passband filter, I hear a rough buzz, which sounds like RFI, on my monitored transmit signal. When I disengage the DPF, my signal sounds clean in the monitor. I continue to make contacts, but a contest is not a great place for critical signal reports. Any clues? Ron W3ZV __ 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 incoming message. Checked by AVG - www.avg.com Version: 8.0.234 / Virus Database: 270.10.23/1949 - Release Date: 02/12/09 11:34:00 __ 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] CW VOX
Ralph Parker wrote: I don't know why VOX has to be turned on explicitly in CW mode. Since nothing happens without it, it may as well be turned on automatically when you select CW. No, thanks! I don't necessarily want to transmit everytime I hit my key. And I often prefer a foot switch to get to transmit mode. VE7XF Ralph that is exactly the way I do it here, too. I activate the K3 with a footswitch (which, in my case, turns on a sequencer and then turns on the K3) whether I am on SSB or CW, and I always keep the VOX turned OFF! That works greathowever, one of the neat K3 features that is therefore unavailable to us is the very convenient option of calling a SSB station in CW. I know this is a feature of existing K3 firmware that permits barefoot or QSK stations to send an automatically offset CW signal to the SSB station. It is otherwise a not-insignificant task to get into split, set the other VFO for CW mode and adjust that VFO up in frequency so the SSB station will hear you, then go back to the original VFO to listen for the SSB again. If the guy is there for a long time calling CQ it is one thing to go through all this...if it is a short-lived marginal multihop Es opening on 6m caused by a meteor scatter link, it is a whole different situation! I would like to formally request that Elecraft consider the possibility of extending this automatic CW setup and XMIT when listening in SSB mode feature to those of us activating the K3 with a footswitch ;-) MNI TNX and VY 73, Lance -- Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8) P.O. Box 73 Frenchtown, MT 59834 USA QTH: DN27UB TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj 2m DXCC #11/6m DXCC #815 __ 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] Reminder - UK Elecraft net Sundays 1000 local, 3630 KHz
The frequency is plus or minus the QRM. Note the start time of 1000 hours to try and minimise European QRM. 73 Dave, G4AON K3/100, Acom 1000, dipole __ 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] XG1
I saw that someone had changed one of the bands on an XG2. Has anyone done that with the XG1? I have both. Not worth trying to sell the XG1. So thought it would be nice if it could be changed to 160M or 10M. Any thoughts on this? 73, N2TK, Tony __ 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] Suggestion for power supply
I now have the spring fever for building...Thinking of putting the KPA100 together for my K2. Any suggestion for a suitable (cheap!) power supply? -- Yves Dussault-VE2ATD __ 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 Beta firmware rev. 2.82
Steven.Zabarnick wrote: I installed the new beta last and tested the new output power control. I don't see any improvement in PSK31 output power using DATA A mode. I still get nearly twice the output power than I have dialed in by the PWR knob. In the previous firmware, the measure output power in CW modes agreed with the PWR knob setting, but now the power output in CW is 20-30% higher than the setting. I will try to redo the transmitter gain calibration to see if this helps. I have just got round to testing this firmware release. Before testing the power output in DATA A mode I did a power calibration. It seems to me that there is still something wrong with the power control in DATA A mode. To make a comparison, I switched the input for SSB to LINE IN so I could compare the power output when sending a pure tone in both modes. In DATA A the gain seems to have been reduced, and I had to increase the LINE IN setting. With PWR set to 50W and the input level set to give a steady 4 bars, I measured 80W on my power meter. A slight improvement but still not enough. In SSB the power output was correctly controlled so that only 50W output was produced. However, after switching between SSB and DATA a few times to compare the results, and also changing bands, I found that the output in DATA is not consistent. Currently I am getting about 65W for 50 selected. At one point on 20m I actually got 50W. On 30m I am actually getting 20W (yes, 20W) with 50W selected, absolutely no change to the audio input compared to the other bands, and 4 bars of ALC showing. Back to the drawing board? - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.g4ilo.com/blog.html G4ILO's Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-Beta-firmware-rev.-2.80%3A-Improvements-to-AFSK-A%2C-DATA-A%2C-SSB%2C-AM%2C-FM%2C-DVR-tp2305650p2326853.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] Sub vs Split
I'm sure this is obvious to most but not to me. I am blaming it on separation anxiety since my K3 only recent returned from Aptos. I have the KRX3 installed and work split using the Sub Rx. I lock vfo B on the DX and use vfo to find a tx frequency. When might using the split button be indicated? What are the differences? Howard..K2HK HK __ 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 Beta firmware rev. 2.82
I discovered that my cw power issue was due to a bad power supply for my Elecraft W1 wattmeter. My cw power measurement now agrees with the K3 setting. I still see a 50% higher power output in Data A mode than the K3 setting -- this is an improvement over the nearly 100% that I was seeing using previous firmware. These observations agree with what G4ILO is seeing. I installed the new beta last and tested the new output power control. I don't see any improvement in PSK31 output power using DATA A mode. I still get nearly twice the output power than I have dialed in by the PWR knob. In the previous firmware, the measure output power in CW modes agreed with the PWR knob setting, but now the power output in CW is 20-30% higher than the setting. I will try to redo the transmitter gain calibration to see if this helps. Steve N9SZ K3 #1672 __ 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] Dynamic Mics on K3
Thanks to Jim (K9YC) and others for the info on your EQ settings. I'm curious if you have to set all these back to flat for operating data modes that are actually using SSB (like PSK AFSK). Or are they bypassed when you change main mode to DATA? There is *one* Tx EQ in the K3, so *any* mode that uses audio for transmit will be using the Tx EQ settings you have in place. I know the next question: Can we have by-mode Tx EQ? and the answer is yes, but you must be patient. Similarly, the Rx EQ applies to the receiver not the mode, so it is also used in all modes that use receive audio, which is all of them :-) Bill Coleman N2BC has written a very nice utility program for the K3 which you can download for free URL:http://home.roadrunner.com/~n2bc/SW.htm . This lets you save, restore and generally manipulate the EQ settings among other things. 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
[Elecraft] K2 #6638 Online!
Hello everyone- Thanks to Don Wilhelm and a few others, my K2 is complete and on the air. After assembly I had a couple issues... one was the voltage on the display was extremely erratic and we were able to determine that the vsense pin on the uP was blown, so I had to purchase a new set of firmware. Kind of a bummer, but I'm over it. Also couldn't get 10 or 12 to transmit, traced it to the bandpass filter and replaced some parts. Did a little damage to the board trying to remove L13. But I'm not convinced there were any bad parts - I think I just didn't turn the slug far enough the first time I tried to peak 10m. Tuned up on my dipole, I can push about 13 watts out on 40m with a current draw of about 2.4ma. I'm happy!! Going to try to get a contact today. Thanks again to Don and anyone else who replied to my inquiries. I'm sure there will be more when I work through the ATU and the SSB Board. 73, K8DJW Dave -- View this message in context: http://n2.nabble.com/K2--6638-Online%21-tp2327124p2327124.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] Dynamic Mics on K3
Lyle Johnson wrote: I know the next question: Can we have by-mode Tx EQ? and the answer is yes, but you must be patient. Similarly, the Rx EQ applies to the receiver not the mode, so it is also used in all modes that use receive audio, which is all of them :-) I can't see any reason at all to have EQ in DATA A mode, which might at least save a bit of work and memory for storing the settings. However I suppose there will now be a flurry of emails from people who use DATA A for some weird purpose where EQ could be useful. :) - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.g4ilo.com/blog.html G4ILO's Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/Dynamic-Mics-on-K3-tp2327062p2327149.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] K2 #6638 Online!
of course I meant 2.4a... hihi. -- View this message in context: http://n2.nabble.com/K2--6638-Online%21-tp2327124p2327160.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] Boom Mic/Stereo Headsets for the K3
I saw the questions about K3 headsets. I have the ON'AIR Headset offered by US Interface for about $40. http://www.usinterface.com/naviusa_012.htm I have no relationship with the company. Their service was good and I can recommend the product with the caveats mentioned below. The headsets are stereo; it comes with a Kenwood adapter plug. You can plug it into the K3 rear connectors without any modifications. The noise-canceling boom microphone is electret and if you wish to use the Kenwood adapter on the K3 front panel you will have to rewire the adapter plug to move the bias pin attachment. I did the rewire the connector, it was easy enough but I usually use the rear connectors and have a second microphone plugged in through the front using the Kenwood adapter. You will need a separate push to talk switch. I built one and plug it into the back connector. The headset is very comfortable and works quite well with the K3. I know they are stereo because the K3 audio effects are evident as well as separate audio for the sub receiver when I have it turned on. I get great audio reports. There is one thing that I don't like about the product. The cord attaches to the same earpiece as the boom mic. You can see this in the photo of the girl wearing the headset on the web site. If I am talking and moving my head the cord vibrations can be picked up by the mic. When I speak to a local ham (very strong signal) he could hear the artifacts. So, I made a simple modification routing the cord over the headset band to the other side to alleviate the problem. I secured the cord to the headband via wire ties. Now I have a completely satisfactory product. When I operate CW I just swivel the boom mic up out of the way. Mike Scott - AE6WA Tarzana, CA (DM04 / near LA) 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] Suggestion for power supply
I have had good luck with the SEC 1223 which I use for both the K2/100 and the K3. I purchased from Amateur Electronic Supply. Bruce-W8FU -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Yves Dussault Sent: Saturday, February 14, 2009 11:54 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Suggestion for power supply I now have the spring fever for building...Thinking of putting the KPA100 together for my K2. Any suggestion for a suitable (cheap!) power supply? -- Yves Dussault-VE2ATD __ 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] Elecraft 70cm transverter, K3 and repeater access tones?
Hi David, Thanks for the information. I didn't realize that the XV432 didn't cover the whole 70cm band. This is good to know, as I intended to use the transverter to communicate with local 440 machines. I suppose it would be better for me then to go with the XV144, or just buy a 2m/440 base instead. 73, James KC2UEE -Original Message- From: David Giles [mailto:vk...@aapt.net.au] Sent: Friday, February 13, 2009 10:20 PM To: KC2UEE Subject: Re: [Elecraft] Elecraft 70cm transverter, K3 and repeater access tones? Hello James, Repeaters on 10m and 6m are well within the K3's abilities. A K3 with XV144 (or any other 2m transverter with a 116MHz local oscillator) will cover repeaters between 144-146MHz. But 70cm is a bit of a problem. A K3 and XV432 will only cover 432 to 434MHz in stock form. In VK our repeaters are around 438 to 440MHz with a -5MHz offset. So with a K3+XV432, I could transmit into but not hear anything from them. One wish/suggestion I have made before is to modify the XV432 for a 6m IF. This would give it a 6MHz range. I have set up my lesser quality homebrew transverter this way and I get 432 to 438MHz - ideal for my main interest in satellites, but still not quite there for my local repeater. Hope this helps. 73 de David VK5DG KC2UEE wrote: Dear group, I'm curious as to how this would work. Say I have an Elecraft 70cm transverter connected to my K3. I'm assuming that if I wanted to use the transverter to communicate with UHF repeaters I would select the transverter via band button, set the mode to FM and select proper tone, set power output on the transverter to 10w or less, and the transverter will do the rest? I've never used a transverter before, so I apologize if my question is a stupid one. 73, James KC2UEE __ 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] Sub vs Split
Hi Howard: It makes you feel like you're doing something wrong, doesn't it. Make sure nobody else is in the shack. With my prior radio, an FT1000D, the sub receiver was not quite as good as the main receiver. (Different filters and no audio peak filter). So it was logical to receive with the main and use the sub in split mode to hunt for a good place to transmit. But now with the K3 the sub is exactly the same. So I say, go for it. I have found a few minor negatives to this practice. If I hit a spot off of my logging program, the spot goes to VFO A which might not be what I want. When computer logging, the recorded frequency is from VFO A not B. Direct frequency entry, and a few other features only affect VFO A (at least for now). Also you can't use diversity reception while doing this. You have to be unlinked. I guess we'll soon be requesting that Wayne provide other uses for the SPLIT button. 73, Mike K2MK Howard K2HK Sat, 14 Feb 2009 09:55:53 -0800 I'm sure this is obvious to most but not to me. I am blaming it on separation anxiety since my K3 only recent returned from Aptos. I have the KRX3 installed and work split using the Sub Rx. I lock vfo B on the DX and use vfo to find a tx frequency. When might using the split button be indicated? What are the differences? Howard..K2HK __ 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 Beta firmware rev. 2.82
You CAN NOT make those tests at 50 Watts! The power calibration circuitry will be constantly changing the internal gain. If the ATU is enabled and/or your dummy load is not flat the changes invalidate the measurements. Further, single tone power calibration is only accurate for the specific frequency within the IF filter on which the calibration is performed. If I calibrate power in CW mode that calibration point is approximately 300 Hz from one corner of the 2.8 KHz filter thanks to the way the K3 offsets the filters. When I switch to DATA A, and try to test the power level with a 1500 Hz tone, I can see 2 dB more power simply because my 2.8 KHz filter has a 4 dB slope across the passband and the K3 gain calculation includes compensation for the loss at the calibration frequency. If I check the power with a 1 KHz tone, the difference may be 3 dB (DATA A is USB, CW calibration is LSB so the slope changes direction with tone). If I switch to AFSK A (REV to stay with USB) and check power with a 2295 Hz (USB Mark) tone, the difference may be down to one dB or so. There are too many uncompensated variables to expect the K3 to maintain absolute control over the power output with changing antennas, power levels, modes, (relative) frequency within the IF passband and possibly even different filters. ALC controls the audio level into, and the RF level out of the DSP (modulator) process - it is an ALC (automatic LEVEL control) NOT an APC (automatic POWER control). The ALC is an open loop system - the loop gain is calibrated once at the 5 watt level and once at the 50 watt level for one specific frequency in the IF passband. Once that is done, ALC simply controls the DSP gain. If you change the system gain following the DSP, the output power level WILL CHANGE. I'm sure it would be theoretically possible to calibrate the system gain from 100 Hz to 2900 Hz offsets from the carrier (for both the USB and LSB cases) and apply that mask to the modulation process but does the DSP system have enough horsepower to do so and is it worthwhile simply so the operator can avoid the need to check his power level when changing mode or modulating frequency? 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Julian, G4ILO Sent: Saturday, February 14, 2009 11:58 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82 Steven.Zabarnick wrote: I installed the new beta last and tested the new output power control. I don't see any improvement in PSK31 output power using DATA A mode. I still get nearly twice the output power than I have dialed in by the PWR knob. In the previous firmware, the measure output power in CW modes agreed with the PWR knob setting, but now the power output in CW is 20-30% higher than the setting. I will try to redo the transmitter gain calibration to see if this helps. I have just got round to testing this firmware release. Before testing the power output in DATA A mode I did a power calibration. It seems to me that there is still something wrong with the power control in DATA A mode. To make a comparison, I switched the input for SSB to LINE IN so I could compare the power output when sending a pure tone in both modes. In DATA A the gain seems to have been reduced, and I had to increase the LINE IN setting. With PWR set to 50W and the input level set to give a steady 4 bars, I measured 80W on my power meter. A slight improvement but still not enough. In SSB the power output was correctly controlled so that only 50W output was produced. However, after switching between SSB and DATA a few times to compare the results, and also changing bands, I found that the output in DATA is not consistent. Currently I am getting about 65W for 50 selected. At one point on 20m I actually got 50W. On 30m I am actually getting 20W (yes, 20W) with 50W selected, absolutely no change to the audio input compared to the other bands, and 4 bars of ALC showing. Back to the drawing board? - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.g4ilo.com/blog.html G4ILO's Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-Beta-firmware-rev.-2.80%3A-Improvement s-to-AFSK-A%2C-DATA-A%2C-SSB%2C-AM%2C-FM%2C-DVR-tp2305650p2326853.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] DIVERSITY DILEMMA OVER
Even though I might still get advice on the real necessity to get matched filters for true diversity rx, I have figured out an easy solution. When I purchase the sub rx in the future, I will get 2 matched 400 cycle filters. That way I can have true diversity with the 400's, and almost true diversity with whatever other way the main sub are filtered. Diversity receive will then be available to enjoy when I have the need to use it. If it helps me get one callsign thru that I'm really trying to hear, it will make me happy I have it! Thanks anyway.__ 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] Version 1.0.3 of K3 filter Tools
I have uploaded Version 1.0.3 of K3 Filter Tools to my web site*: http://www.ks7d.com It includes a bug fix and adds some enhancements: Bug fix: · Fixed Quick Test procedure in dBV Linear Range so that Reset K3 works properly at end of process to reset K3 to its state prior to running Quick Test procedure. Enhancements: · Added receiver sensitivity (MDS) testing function to allow user to determine minimum discernable signal capability of their K3 and compare it with Elecraft's specifications (-136 dBm with preamp on, 500 Hz bandwidth in CW mode). All that is required to run the test is an Elecraft XG1 or XG2; · Added a Tutorial Help file to supplement the main Help file. It takes the user step by step through the dBV Linear Range and the Filter Sweep procedures; · Added Browse Buttons to the Help files to make navigation easier; · Number formats have been included for frequency and dBV data appearing in the results list boxes. dBV is formatted as xx.x and frequency is formatted as x.xxx. The next major enhancement will be the capability to run filter sweeps for the crystal filters installed in the sub-receiver, KRX3. Technical Information: a.. Effect of Pitch on Filter Measurements: We made a number of filter sweep test runs at various Pitch settings to determine what effect the Pitch setting has on filter measurement results. We found that when running a filter sweep in CW mode the Pitch setting has a significant effect on the filter measurements. We recommend users set their Pitch to 800 Hz which is the maximum available value in the K3. Please see the article Effect of Pitch on Filter Measurements at: http://www.ks7d.com/EffectofPitch.htm for more details. b.. Effect of Mode on Filter Measurements: We have found the best filter sweep test results for CW filters will be had if you use Data A mode rather than CW mode when testing your CW filters. Please see the article Effect of Mode on Filter Measurements at: http://www.ks7d.com/EffectofMode.htm for details. * Note this is a new web site. It replaces http://mysite.verizon.net/ks7d. Mike, KS7D__ 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 Beta firmware rev. 2.82
Joe Subich, W4TV-4 wrote: You CAN NOT make those tests at 50 Watts! The power calibration circuitry will be constantly changing the internal gain. If the ATU is enabled and/or your dummy load is not flat the changes invalidate the measurements. Why on earth not? I think you are confusing the situation with what happens when you press TUNE at 50 watts (which I personally think is a disaster that has already happened on many occasions, but that is another matter.) If you are suggesting that you cannot use the K3 AT ALL with the power set to 50 watts then something is deeply wrong, either with your understanding or with the design of the radio. Further, single tone power calibration is only accurate for the specific frequency within the IF filter on which the calibration is performed. If I calibrate power in CW mode that calibration point is approximately 300 Hz from one corner of the 2.8 KHz filter thanks to the way the K3 offsets the filters. When I switch to DATA A, and try to test the power level with a 1500 Hz tone, I can see 2 dB more power simply because my 2.8 KHz filter has a 4 dB slope across the passband and the K3 gain calculation includes compensation for the loss at the calibration frequency. If I check the power with a 1 KHz tone, the difference may be 3 dB (DATA A is USB, CW calibration is LSB so the slope changes direction with tone). If I switch to AFSK A (REV to stay with USB) and check power with a 2295 Hz (USB Mark) tone, the difference may be down to one dB or so. Well I may not be a professional radio engineer but I am not dumb enough to try testing with different frequency tones. As stated, I was testing with the same tone in SSB and DATA mode. As far as I am aware, the filter passband on transmit is the same in both modes. Even if not, this does not explain why I got 65W on most bands and 20W on 30m, with exactly the same input. There are too many uncompensated variables to expect the K3 to maintain absolute control over the power output with changing antennas, power levels, modes, (relative) frequency within the IF passband and possibly even different filters. ALC controls the audio level into, and the RF level out of the DSP (modulator) process - it is an ALC (automatic LEVEL control) NOT an APC (automatic POWER control). The ALC is an open loop system - the loop gain is calibrated once at the 5 watt level and once at the 50 watt level for one specific frequency in the IF passband. Once that is done, ALC simply controls the DSP gain. If you change the system gain following the DSP, the output power level WILL CHANGE. I'm sure it would be theoretically possible to calibrate the system gain from 100 Hz to 2900 Hz offsets from the carrier (for both the USB and LSB cases) and apply that mask to the modulation process but does the DSP system have enough horsepower to do so and is it worthwhile simply so the operator can avoid the need to check his power level when changing mode or modulating frequency? Sorry, but I don't see where the system gain comes in to the argument, since I am reporting results with the same frequency tone used at all times. Nor do I see why changing antennas has any relevance to this issue, since I am using a dummy load that is flat to 500MHz for these tests. The K3 is perfectly capable of regulating the power to a level of accuracy that is acceptable to me in SSB mode. All I am asking is that it perform the same task in DATA A, which is just SSB after all. Early versions of the firmware were perfectly capable of doing this. Why am I being treated as if I am demanding the impossible for simply asking for something that can be done and has been done. I really am very, very fed up with the K3 at this point in time. - Julian, G4ILO. K2 #392 K3 #222. http://www.g4ilo.com/ G4ILO's Shack http://www.g4ilo.com/blog.html G4ILO's Bloghttp://www.g4ilo.com/kcomm.html KComm for Elecraft K2 and K3 -- View this message in context: http://n2.nabble.com/K3-Beta-firmware-rev.-2.80%3A-Improvements-to-AFSK-A%2C-DATA-A%2C-SSB%2C-AM%2C-FM%2C-DVR-tp2305650p2327668.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] K3 power out vs commanded
I spent some time measuring K3 power out vs. TUN PWR setting. I used a 60 MHz scope for power measurement and a dummy load that measures 1.06 SWR with the 10X scope probe connected. I did all measurements on 40M and I did these tests after conducting the power calibration procedure that is part of the Elecraft K3 utility. In general I found plus or minus 5% agreement with the Tune power setting from 5 to 100 watts. With less than 5 watts power out the K3 seemed to have greater errors with more output power than requested. Worse case was 0.1 watts commanded with 0.16 watts measured. At 100 watts I measured 95 watts out, 5% low. I suspect +/- 5% is what I can measure with my equipment so I find good agreement. The measurements were very repeatable and I saw no evidence of power fluctuations on Tune power or later SSB tests. I looked at PEP power out at two commanded power settings (100 watts and 30 watts). PEP was a tad low but it is now the same as CW tune (my TXG VCE is +1 dB which I set based on these measurements). After looking at output in SSB I decided I could probably back my microphone gain off a bit. Perhaps I was pressing the number of ALC bars more than I needed to. There doesn't seem to be an advantage to pushing this. Details are in this table, I hope it renders properly. TUN MeasuredError 0.1 0.1658% 0.2 0.3051% 0.3 0.4652% 0.5 0.7040% 1 1.2 16% 2 2.3 13% 5 5.1 1% 10 10.22% 12 12.11% 15 15.43% 20 19.8-1% 30 30.31% 40 39.1-2% 50 49.7-1% 60 58.1-3% 70 68.1-3% 80 77.4-3% 90 85.6-5% 100 95.1-5% Mike Scott - AE6WA Tarzana, CA (DM04 / near LA) 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] Sub vs Split
K2MK wrote: Also you can't use diversity reception while doing this. You have to be unlinked. You can use Split in Diversity, but you must use the REV button to tune the pileup. It's like using Split with one RX but you're receiving in Diversity using both RXs. I always LOCK the DX frequency in case I accidentally hit a knob at the wrong time. When you REV, the other VFO is NOT locked so you can zero beat your TX in the pileup. 73, Bill -- View this message in context: http://n2.nabble.com/Sub-vs-Split-tp2327049p2327724.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 Beta firmware rev. 2.82
Why on earth not? I think you are confusing the situation with what happens when you press TUNE at 50 watts (which I personally think is a disaster that has already happened on many occasions, but that is another matter.) To normalize the radio's output power for any valid test you need to measure the single tone carrier power (e.g., CW). If you do that (press tune at 50 watts), you will recalibrate. The recalibration will render any subsequent measurement incompatible with previous measurements. If you are suggesting that you cannot use the K3 AT ALL with the power set to 5o watts then something is deeply wrong, either with your understanding or with the design of the radio. That's not what I'm suggesting at all. I'm saying you can't make repeatable measurements at 50.0 watts because of the need to calibrate the power level before undertaking measurements. Make the measurements at 40 or 60 watts to eliminate the errors introduced by automatic recalibration. As to understanding of the radio ... anyone who thinks the ALC should act as an APC has a far distance to go in their understanding of the radio and those factors that impact power output. -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Julian, G4ILO Sent: Saturday, February 14, 2009 3:44 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82 Joe Subich, W4TV-4 wrote: You CAN NOT make those tests at 50 Watts! The power calibration circuitry will be constantly changing the internal gain. If the ATU is enabled and/or your dummy load is not flat the changes invalidate the measurements. Why on earth not? I think you are confusing the situation with what happens when you press TUNE at 50 watts (which I personally think is a disaster that has already happened on many occasions, but that is another matter.) If you are suggesting that you cannot use the K3 AT ALL with the power set to 50 watts then something is deeply wrong, either with your understanding or with the design of the radio. Further, single tone power calibration is only accurate for the specific frequency within the IF filter on which the calibration is performed. If I calibrate power in CW mode that calibration point is approximately 300 Hz from one corner of the 2.8 KHz filter thanks to the way the K3 offsets the filters. When I switch to DATA A, and try to test the power level with a 1500 Hz tone, I can see 2 dB more power simply because my 2.8 KHz filter has a 4 dB slope across the passband and the K3 gain calculation includes compensation for the loss at the calibration frequency. If I check the power with a 1 KHz tone, the difference may be 3 dB (DATA A is USB, CW calibration is LSB so the slope changes direction with tone). If I switch to AFSK A (REV to stay with USB) and check power with a 2295 Hz (USB Mark) tone, the difference may be down to one dB or so. Well I may not be a professional radio engineer but I am not dumb enough to try testing with different frequency tones. As stated, I was testing with the same tone in SSB and DATA mode. As far as I am aware, the filter passband on transmit is the same in both modes. Even if not, this does not explain why I got 65W on most bands and 20W on 30m, with exactly the same input. There are too many uncompensated variables to expect the K3 to maintain absolute control over the power output with changing antennas, power levels, modes, (relative) frequency within the IF passband and possibly even different filters. ALC controls the audio level into, and the RF level out of the DSP (modulator) process - it is an ALC (automatic LEVEL control) NOT an APC (automatic POWER control). The ALC is an open loop system - the loop gain is calibrated once at the 5 watt level and once at the 50 watt level for one specific frequency in the IF passband. Once that is done, ALC simply controls the DSP gain. If you change the system gain following the DSP, the output power level WILL CHANGE. I'm sure it would be theoretically possible to calibrate the system gain from 100 Hz to 2900 Hz offsets from the carrier (for both the USB and LSB cases) and apply that mask to the modulation process but does the DSP system have enough horsepower to do so and is it worthwhile simply so the operator can avoid the need to check his power level when changing mode or modulating frequency? Sorry, but I don't see where the system gain comes in to the argument, since I am reporting results with the same frequency tone used at all times. Nor do I see why changing antennas has any relevance to this issue, since I am using a dummy load that is flat to 500MHz for these tests. The K3 is perfectly capable of regulating the
Re: [Elecraft] Sub vs Split
Hi Bill: Howard was using his VFO B as a fixed frequency receiver and he was tuning VFO A to listen and change his TX frequency. He was not using SPLIT and he could not have been using diversity. He had to be unlinked. So he always had the DX station in his right ear. What you're describing is using VFO A plus diversity to listen to the DX station and using VFO B as your split transmit frequency. This is a normal split approach plus diversity. The DX station is always in your left ear and mostly in your right ear until you press REV. Then you can spin VFO A to change and listen to your transmit frequency. This method works and requires two hands. Another approach is to toggle BSET. With BSET activated, you will now hear VFO B in your right ear. You can then change your transmit frequency by spinning VFO B. Only one hand is required while your other is on the paddle or keyboard. Toggle again to go back to diversity in your right ear. 73, Mike K2MK Bill W4ZV Sat, 14 Feb 2009 13:04:58 -0800 K2MK wrote: Also you can't use diversity reception while doing this. You have to be unlinked. You can use Split in Diversity, but you must use the REV button to tune the pileup. It's like using Split with one RX but you're receiving in Diversity using both RXs. I always LOCK the DX frequency in case I accidentally hit a knob at the wrong time. When you REV, the other VFO is NOT locked so you can zero beat your TX in the pileup. 73, Bill __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3: audio drops at bandwidth .10 kHz
Spotted perfectly on a CW signal, I narrow the BW from .15 to .10. I hear a click and the audio suddenly drops to about 1/3. S-meter reading stays the same. It didn't do this when the radio was new, but it has been doing it at least since FW 2.78. I now have 2.82. My narrowest roofing filter is . 5. Anybody know what this is about? Windy KM5Q K3 #764 __ 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] switch emulation numbers table
I've been looking at the k3 programmer's reference trying to get a feel for what can be accomplished via the serial port. However, the switch location table in the section on the swt and swh commands got severely scrambled in the conversion to text. Could someone out there please send me that table as one column? It would make my investigations go much more quickly. Thank you all for your time and consideration. __ 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] Elecraft SSB Net Announcement
Hi gang, The weekly Elecraft SSB net will meet tomorrow (Sunday, 2/15/09) at 1800Z. We will start at 14.316 MHz, and QSY if needed. The net control is in western Oregon, but we will need a good east coast or midwest station to relay a few west coast signals that may be too close to net control. Tear yourself away from the amusing K5D pileups to join us. See you there. 73, Phil, NS7P __ 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: audio drops at bandwidth .10 kHz
Are you using the RX EQ as a peaking filter? EQ is bypassed when BW is less than 150 Hz. -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of KM5Q Sent: Saturday, February 14, 2009 5:30 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K3: audio drops at bandwidth .10 kHz Spotted perfectly on a CW signal, I narrow the BW from .15 to .10. I hear a click and the audio suddenly drops to about 1/3. S-meter reading stays the same. It didn't do this when the radio was new, but it has been doing it at least since FW 2.78. I now have 2.82. My narrowest roofing filter is . 5. Anybody know what this is about? Windy KM5Q K3 #764 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 - Strange Tune Behaviour
Hi All, I've been having issues since last night with an inability to use the Tune Function on the K3. I use Tune to get a carrier to tune my amp (an Emtron DX-1). Usually this works fine, but now the Tune simply turns itself straight off after it is pressed when I have the amp turned on. The Tune funtion still seems to work OK on lower power without the amp. I'm assuming this may be related to my antennas being saturated at the moment (we've had steady rain for a full week), although according to the SWR reading on the radio and my external tuner all is still OK. Does the K3 have some sort of sensing that will turn off Tune if it suspects a problem? I am able to tune the amp manually with a straight key, but this is a pain as I have to plug and unplug cables everytime. Thanks David, VK2NU__ 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 Caution when using an external monaural speaker
Hi Ron, I just ordered my K3 on Thursday. Do you know if this modification has already been phased in to new kits? 73, James KC2UEE Ron D'Eau Claire wrote: Hello David: Wayne asked me to reply since I prepared the application note. Only two resistors are needed, so if you've done the mod using the daughter board locations Wayne originally mentioned, you're all set. The version shown in the app note mimics what Aptos is doing as they modify the boards in inventory. The resistors are in the same place electrically, but they chose to put them on the main KIO3 board instead. We followed that in the application note so it'd be easy to tell if the modification has been made either in the field or at the factory. Ron AC7AC -- View this message in context: http://n2.nabble.com/K3-Caution-when-using-an-external-monaural-speaker-tp1680829p2328299.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 Beta firmware rev. 2.82
Hi Joe, Further, single tone power calibration is only accurate for the specific frequency within the IF filter on which the calibration is performed. If I calibrate power in CW mode that calibration point is approximately 300 Hz from one corner of the 2.8 KHz filter thanks to the way the K3 offsets the filters. If I understand you correctly, you're essentially saying that in DATA- A (where, according to Elecraft, ALC action is intentionally minimized to minimize distortion), we're seeing more of the true shape of the filter passband. Whereas in a voice mode (USB or LSB, where ALC action is more pronounced,) the ALC action will tend to make the filter passband appear flat if the input is a single tone. To test this, I used an audio signal generator to input single tones of various frequencies into my K3 in both LSB and DATA-A modes. I set the power control for 30W. Here are my measurements: AF input freq. Po-DATA-APo-LSB TUNE25.7 25.2 200 4.6 6.1 40027.0 24.8 60034.5 24.8 80045.6 24.8 100053.1 24.8 120047.5 24.8 140037.8 24.8 160032.3 24.8 180030.9 24.8 200031.9 24.8 220034.3 24.8 240037.9 24.8 260034.9 24.8 280013.9 24.8 3000 nil nil So, neglecting the ~25 W vs 30 W error, it's clear that something is keeping a tight rein on things in LSB, but is not doing so in DATA-A. Presumably, this is the ALC action, which we are told is minimized in DATA-A mode. The data also seem to corroborate your statement that the calibration point is 300 Hz from the filter corner. If I'm really wrong about something, please correct me. If I'm NOT wrong, I think I might finally understand why power output in DATA-A doesn't seem to track the requested power closely. 73 -- Joe KB8AP On Feb 14, 2009, at 11:36 AM, Joe Subich, W4TV wrote: You CAN NOT make those tests at 50 Watts! The power calibration circuitry will be constantly changing the internal gain. If the ATU is enabled and/or your dummy load is not flat the changes invalidate the measurements. Further, single tone power calibration is only accurate for the specific frequency within the IF filter on which the calibration is performed. If I calibrate power in CW mode that calibration point is approximately 300 Hz from one corner of the 2.8 KHz filter thanks to the way the K3 offsets the filters. When I switch to DATA A, and try to test the power level with a 1500 Hz tone, I can see 2 dB more power simply because my 2.8 KHz filter has a 4 dB slope across the passband and the K3 gain calculation includes compensation for the loss at the calibration frequency. If I check the power with a 1 KHz tone, the difference may be 3 dB (DATA A is USB, CW calibration is LSB so the slope changes direction with tone). If I switch to AFSK A (REV to stay with USB) and check power with a 2295 Hz (USB Mark) tone, the difference may be down to one dB or so. There are too many uncompensated variables to expect the K3 to maintain absolute control over the power output with changing antennas, power levels, modes, (relative) frequency within the IF passband and possibly even different filters. ALC controls the audio level into, and the RF level out of the DSP (modulator) process - it is an ALC (automatic LEVEL control) NOT an APC (automatic POWER control). The ALC is an open loop system - the loop gain is calibrated once at the 5 watt level and once at the 50 watt level for one specific frequency in the IF passband. Once that is done, ALC simply controls the DSP gain. If you change the system gain following the DSP, the output power level WILL CHANGE. I'm sure it would be theoretically possible to calibrate the system gain from 100 Hz to 2900 Hz offsets from the carrier (for both the USB and LSB cases) and apply that mask to the modulation process but does the DSP system have enough horsepower to do so and is it worthwhile simply so the operator can avoid the need to check his power level when changing mode or modulating frequency? 73, ... Joe, W4TV __ 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 Beta firmware rev. 2.82
So, if I'm tuning up through, say, a Z-Match into a doublet and power output is set to around 5 or 50W and press Tune in order to tweak the Z-Match, the initial (off-tune) complex impedance the K3 may see could very well cause the K3's output power to change to 5 or 50W and because of that, power indication would be screwed up without my noticing it? (Sorry for the long sentence, but BTDT.) Surely, for something that is a calibration feature, it needs to be protected by an on/off switch? It isn't as though this is a new topic. I've seen it crop up a number of times in different forms on this reflector and have been waiting for the Aptos wizards to make power calibration a menu item. Turn it on in the menu, have a few LED winky-blinkys to warn you're in Power Cal., do the job then turn it off in the menu. I suppose there's some horribly technical reason for not doing it. DaveL G3TJP Julian said: Why on earth not? I think you are confusing the situation with what happens when you press TUNE at 50 watts (which I personally think is a disaster that has already happened on many occasions, but that is another matter.) Joe said: To normalize the radio's output power for any valid test you need to measure the single tone carrier power (e.g., CW). If you do that (press tune at 50 watts), you will recalibrate. The recalibration will render any subsequent measurement incompatible with previous measurements. __ 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 Caution when using an external monaural speaker
According to the Enhancements and App Notes page at: http://www.elecraft.com/K3/k3_app_notes.htm This modification is needed for all K3s shipped approximately before 01/12/09 containing either a Revision XB or Revision A KIO3 board. Bob NW8L On Sat, Feb 14, 2009 at 5:41 PM, KC2UEE kc2...@gmail.com wrote: Hi Ron, I just ordered my K3 on Thursday. Do you know if this modification has already been phased in to new kits? 73, James KC2UEE Ron D'Eau Claire wrote: Hello David: Wayne asked me to reply since I prepared the application note. Only two resistors are needed, so if you've done the mod using the daughter board locations Wayne originally mentioned, you're all set. The version shown in the app note mimics what Aptos is doing as they modify the boards in inventory. The resistors are in the same place electrically, but they chose to put them on the main KIO3 board instead. We followed that in the application note so it'd be easy to tell if the modification has been made either in the field or at the factory. Ron AC7AC -- View this message in context: http://n2.nabble.com/K3-Caution-when-using-an-external-monaural-speaker-tp1680829p2328299.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] switch emulation table -- got it
Thanks to all. Got my table. Now to start playing with getting psk up and running. 73 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K3] K3 filter
Looks like I'm ordering another K3. I was wondering, when I place my order for the second K3 can I ask for the 2.7 filter to be matched (as close as possible) to my second rx that I will be moving from my older one to my new one? I lucked out and had a very close match on my old one. I emailed sales but won't hear until probably Mon afternoon est. I'd like to place the order asap. Randy K8RDD -- View this message in context: http://n2.nabble.com/K3-filter-tp2328513p2328513.html Sent from the [K3] 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 Caution when using an external monaural speaker
Yes, but it was also phased in at Aptos on Rev A boards at some point so, while all Rev A and earlier boards need the mod, the more current K3's with Rev A boards probably have had the mod made at the factory already. There's a way to check by just opening the K3's top cover shown in the document. Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob Cunnings Sent: Saturday, February 14, 2009 5:09 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Caution when using an external monaural speaker According to the Enhancements and App Notes page at: http://www.elecraft.com/K3/k3_app_notes.htm This modification is needed for all K3s shipped approximately before 01/12/09 containing either a Revision XB or Revision A KIO3 board. Bob NW8L __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3: send RTTY using KEY IN?
OK...so we can send RTTY using the paddle in. What about sending RTTY using the KEY IN (as in, use an outboard contest program to send CW and have the K3 convert it to RY). I know that this was supposed to be on the list but was this ever implemented? Tnx Doug __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 HRD 2 radios 1 computer
Hello: I have a new K3 and another radio, but one computer. The other radio is successfully HRD-interfaced with the PC. I am thinking of hooking the K3 to the same PC via an RS 232 male-to-female cable. Kosher? Bill Wade, Ai4PF __ 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] LP PAN
For Sale, Factory Assembled LP Pan $175. Price includes shipping conus. Please reply off the list. 73, Jim __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Beta firmware rev. 2.82
So, if I'm tuning up through, say, a Z-Match into a doublet and power output is set to around 5 or 50W and press Tune in order to tweak the Z-Match, the initial (off-tune) complex impedance the K3 may see could very well cause the K3's output power to change to 5 or 50W and because of that, power Not quite ... If you set the power level to exactly 5.0 or 50 watts and press the Tune button the K3 will recalibrate. If you set the power to 4.9, 5.1, 49 or 51 watts it will not recalibrate. -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Lankshear Sent: Saturday, February 14, 2009 7:56 PM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Beta firmware rev. 2.82 So, if I'm tuning up through, say, a Z-Match into a doublet and power output is set to around 5 or 50W and press Tune in order to tweak the Z-Match, the initial (off-tune) complex impedance the K3 may see could very well cause the K3's output power to change to 5 or 50W and because of that, power indication would be screwed up without my noticing it? (Sorry for the long sentence, but BTDT.) Surely, for something that is a calibration feature, it needs to be protected by an on/off switch? It isn't as though this is a new topic. I've seen it crop up a number of times in different forms on this reflector and have been waiting for the Aptos wizards to make power calibration a menu item. Turn it on in the menu, have a few LED winky-blinkys to warn you're in Power Cal., do the job then turn it off in the menu. I suppose there's some horribly technical reason for not doing it. DaveL G3TJP Julian said: Why on earth not? I think you are confusing the situation with what happens when you press TUNE at 50 watts (which I personally think is a disaster that has already happened on many occasions, but that is another matter.) Joe said: To normalize the radio's output power for any valid test you need to measure the single tone carrier power (e.g., CW). If you do that (press tune at 50 watts), you will recalibrate. The recalibration will render any subsequent measurement incompatible with previous measurements. __ 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] unlinking vfos
Somehow I managed to get my vfos linked in my K-3. Can anyone tell me how to get them unlinked so that turning vfo A does not change vfo B? I don't know how I managed to do that but I must have pressed the wrong button at the right time. I haven't been able to find anything about it in the manual. Bruce-W8FU __ 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] MH2 mic for sale
Brand new! Never used. $40 includes shipping CONUS. Paypal no fee. Reply directly to me please. 73, Sid __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3/100 Assembly - Initial test Cals
Greetings, I am just starting the initial test and cals portion of assembly, prior KNB3 enable and KPA3 installation. Power-up went fine with no errors. Before I start with Synthesizer Cal and move on, is now a good time to update the firmware to latest release, then do all the cals? I'm guessing so, but confirmation appreciated. Thanks much. Walter, N0DZJ __ 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] unlinking vfos
Hold Sub -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bruce McLaughlin Sent: Sunday, February 15, 2009 12:15 AM To: elecraft@mailman.qth.net Subject: [Elecraft] unlinking vfos Somehow I managed to get my vfos linked in my K-3. Can anyone tell me how to get them unlinked so that turning vfo A does not change vfo B? I don't know how I managed to do that but I must have pressed the wrong button at the right time. I haven't been able to find anything about it in the manual. Bruce-W8FU __ 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] unlinking vfos
Pressing the SUB switch for a little over one second seems to alleviate this symptom. This is in the manual. matt On Sun, 15 Feb 2009 00:15:23 -0500, you wrote: Somehow I managed to get my vfos linked in my K-3. Can anyone tell me how to get them unlinked so that turning vfo A does not change vfo B? I don't know how I managed to do that but I must have pressed the wrong button at the right time. I haven't been able to find anything about it in the manual. Bruce-W8FU __ 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] unlinking vfos
Bruce: Assuming that you have a Sub Receiver, see page 37 in the Owner's Manual - Rev D1 under the section Dedicated Sub Receiver Controls. Holding SUB will link / unlink the VFOs. 73, Doug, VE3MV K3/100 #2432 - Original Message - From: Bruce McLaughlin bmcla...@bex.net To: elecraft@mailman.qth.net Sent: Sunday, February 15, 2009 12:15 AM Subject: [Elecraft] unlinking vfos Somehow I managed to get my vfos linked in my K-3. Can anyone tell me how to get them unlinked so that turning vfo A does not change vfo B? I don't know how I managed to do that but I must have pressed the wrong button at the right time. I haven't been able to find anything about it in the manual. Bruce-W8FU __ 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 -- I am using the free version of SPAMfighter. We are a community of 5.9 million users fighting spam. SPAMfighter has removed 1012 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len The Professional version does not have this message __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Beta firmware rev. 2.82
Conclusion must be, never ever use 5.0W or 50W except when calibration is needed. Why cant power calibration be turned off? Then we would not have this source for trouble. / SM2EKM Joe Subich, W4TV wrote: So, if I'm tuning up through, say, a Z-Match into a doublet and power output is set to around 5 or 50W and press Tune in order to tweak the Z-Match, the initial (off-tune) complex impedance the K3 may see could very well cause the K3's output power to change to 5 or 50W and because of that, power Not quite ... If you set the power level to exactly 5.0 or 50 watts and press the Tune button the K3 will recalibrate. If you set the power to 4.9, 5.1, 49 or 51 watts it will not recalibrate. __ 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] Elecraft CW Net Announcement
Good Evening, It got a bit late tonight. I was stuck in a book and time simply melts away. However, twenty meters has been very good this week. Each morning I have heard DX stations calling with very good signals. Finding a clear frequency has become problematic some days but that is a good thing. Weather here has been snowy but warm so the snow does not really accumulate but rather remains at a steady state of six inches deep. I have burned through most of one woodpile, soon I'll be using the large one behind the house. Unless, of course, the snow gets really deep and I am forced to the 'emergency' woodpile right outside the door. That one can just sit where it is for a year and be well seasoned come next winter. I have not had a good chance to see the morning comet but hopefully one or more of you have seen it before dawn. Now that the moon is waning it should be getting easier if you have clear skies. It has been cloudy here most nights so I get to see the glow of the moon but few stellar sights. Tomorrow let's test propagation across the continent and see who can hear the best. Now back to taking notes for a class I am creating for the ARES folks. Please join us tomorrow evening. 1) Hail signs (first letter or two of the suffix of your call) 2) NCS help (as well as QSP/QNP relay help) Sunday 2300z (Sunday 3 PM PST) 14050 kHz Stay warm, Kevin. KD5ONS - __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 external ALC to phono
Dear group, If I wanted to make an external ALC cable for use with a linear, do I just need to solder pin 15 to phono center, and pin 12 to the screen beneath the phono cable's sheath for common? 73, James KC2UEE __ 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
