Re: [Elecraft] What do I do now?
In addition to the advice from everyone else, consider Fred Cady's book E740241 or E740242 - The Elecraft KX3 http://www.elecraft.com/elecraft_prod_list.htm#kx3. 73 Bill AE6JV On 4/5/15 at 10:06 PM, mike...@gmail.com (WA7YET) wrote: I purchased a KX3 when they were first introduced. Then life got in the way and all non-essentials were put on hold. Now things have improved and I've been thinking about breaking out my brand new KX3. What have I missed in my absence, and whats the best way to bring this beauty up to speed? Thanks in advance. Mike Eddy WA7YET --- Bill Frantz|Web security is like medicine - trying to do good for 408-356-8506 |an evolved body of kludges - Mark Miller www.pwpconsult.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] What do I do now?
I agree with Bill: Fred's books are all first rate. Another thing you might want to do is call Elecraft tech support on the phone and ask them. They'll know your KX3 serial number and what you have in it, so are in the best position to advise you about any hardware updates, or add in boards you may want add. Plus, if you've not done so, download the KX3 utility and update your firmware to the latest released version. Then, too, consider adding the PX3 to your KX3. With Fixed-Tune mode firmware nearing release, it's particularly valuable; the PX3 really enhances my use of the KX3. 73, Phil W7OX On 4/6/15 11:25 AM, Bill Frantz wrote: In addition to the advice from everyone else, consider Fred Cady's book E740241 or E740242 - The Elecraft KX3 http://www.elecraft.com/elecraft_prod_list.htm#kx3. 73 Bill AE6JV On 4/5/15 at 10:06 PM, mike...@gmail.com (WA7YET) wrote: I purchased a KX3 when they were first introduced. Then life got in the way and all non-essentials were put on hold. Now things have improved and I've been thinking about breaking out my brand new KX3. What have I missed in my absence, and whats the best way to bring this beauty up to speed? Thanks in advance. Mike Eddy WA7YET __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] What do I do now?
On Mon,4/6/2015 11:25 AM, Bill Frantz wrote: In addition to the advice from everyone else, consider Fred Cady's book E740241 or E740242 - The Elecraft KX3 http://www.elecraft.com/elecraft_prod_list.htm#kx3. It's always a good idea to study the manual that comes with any new product. In addition to the one in the box, Elecraft updates the manual every year or two and puts the newest version on the website as a pdf. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KSYN3A Synthesizer problem?
It sounds like you've only put one new board in a 2RX K3. I don't believe that's a supported configuration... 73, Ross N4RP On 4/6/2015 7:01 PM, Roger D Johnson wrote: My new boards arrived today. I popped one into the K3 for some testing. I was especially interested in the low frequency performance as I like to DX the LF broadcasts from 153 to 279 kHz. What I found was that below 400 kHz, the noise level rises and at 100 kHz it's almost 20 over 9 on the S meter! I calibrated my NaP3 spectrum analyzer program and took some measurements of the noise level. 500 kHz -127 dbm 400 -127 300 -124 200 -113 100 -93 That's a 34 db increase in noise level!! Is this the way the new boards are supposed to work? I expected a decrease in sensitivity below 500 kHz but not this. Any ideas? 73, Roger __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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...@n4rp.com -- FCC Section 97.313(a) “At all times, an amateur station must use the minimum transmitter power necessary to carry out the desired communications.” __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KSYN3A Synthesizer problem?
My new boards arrived today. I popped one into the K3 for some testing. I was especially interested in the low frequency performance as I like to DX the LF broadcasts from 153 to 279 kHz. What I found was that below 400 kHz, the noise level rises and at 100 kHz it's almost 20 over 9 on the S meter! I calibrated my NaP3 spectrum analyzer program and took some measurements of the noise level. 500 kHz -127 dbm 400 -127 300 -124 200 -113 100 -93 That's a 34 db increase in noise level!! Is this the way the new boards are supposed to work? I expected a decrease in sensitivity below 500 kHz but not this. Any ideas? 73, Roger __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] KSYN3A Synthesizer problem?
On Mon,4/6/2015 4:01 PM, Roger D Johnson wrote: 500 kHz -127 dbm 400 -127 300 -124 200 -113 100 -93 That's a 34 db increase in noise level!! Is this the way the new boards are supposed to work? Is this with or without an antenna connected? What's the nature of the noise on your spectrum analyzer? Broadband or with humps every 10-20 kHz? Do the peaks drift? Remember that our world is full of switch-mode power supplies spewing out trash on harmonics of their square waves, and the lower we go in frequency, the stronger they are. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 no power
I have had similar problem before. Expertly helped by Elecraft support, I found the PIN diode on the RF board was broken. I would suggest you to talk to Elecraft support. 73 de JH3SIF, Keith 2015/04/05 8:06、Mike Reublin NF4L n...@comcast.net のメール： My K3 puts out no power in any mode, either on the SteppIR or into a dummy load. It's not in test or split. TX INH is off. Holding tune results in the LCD displaying 0 W, and the VFO A area changes to 2 dashes on the right, no digits. Tune power is set to 50W, Power to 100W. A 50W TX Gain calibration passed, but still no joy. It seems to be hearing OK. What have I fat fingered? 73, Mike NF4L __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to jh3...@sumaq.jp __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] KSYN3A Synthesizer problem?
Roger, More on this... Since KSYN3A buyers may not always see the FAQ, we'll be adding something like this to page 1 of the KSYN3A installation manual: * * * Note on K3 low-frequency (100-400 kHz) receive coverage with the KSYN3A installed: With a KSYN3A installed, the K3 VFO can be tuned as low as 100 kHz. Sensitivity will be very good in the 600-meter band (470 kHz) if a KBPF3 filter module is installed, and the antenna is connected to either the RX ANT IN or XVTR IN jack on the KXV3 module. However, below 300 kHz, sensitivity starts to decrease quickly, because the K3's receiver was optimized for use on higher bands. Typical sensitivity at 300 kHz will be about -100 dBm. The preamp should be turned off at very low frequencies because it is not useful here; it will only increase noise level. * * * Let me know if you think further clarification would also be helpful. Thanks, Wayne N6KR On Apr 6, 2015, at 4:01 PM, Roger D Johnson n...@roadrunner.com wrote: My new boards arrived today. I popped one into the K3 for some testing. I was especially interested in the low frequency performance as I like to DX the LF broadcasts from 153 to 279 kHz. What I found was that below 400 kHz, the noise level rises and at 100 kHz it's almost 20 over 9 on the S meter! I calibrated my NaP3 spectrum analyzer program and took some measurements of the noise level. 500 kHz -127 dbm 400 -127 300 -124 200 -113 100 -93 That's a 34 db increase in noise level!! Is this the way the new boards are supposed to work? I expected a decrease in sensitivity below 500 kHz but not this. Any ideas? 73, Roger __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] KSYN3A Synthesizer problem?
Hi Roger, The noise floor is coming up because the RX circuitry was optimized for use from 250 kHz and up. Multiple sources start contributing significant noise below 250 kHz. Even though the new synth tunes down to 100 kHz, we tried to make it clear in the KSYN3A FAQ that the receiver isn't very sensitive in this range. It does very well in the 600-meter band (472 kHz), and has reasonable sensitivity in the 300-450 kHz range where there are many LF beacons. To quote from the KSYN3A FAQ: Q: What is the K3's 100-490 kHz receive sensitivity? A: With preamp OFF, we measured about -125 dBm at 475 kHz At 250 kHz the sensitivity is about 10-20 dB lower, and it will go down from there. Yours is better than our baseline measurement. The FAQ entry continues: We have not measured MDS below 250 kHz, but the receiver will gradually become less sensitive as you go lower in frequency due to band-pass filter roll off (in the KBPF3, which is required for operation below 160 meters). These tests were made with the signal routed through the RX ANT IN or XVTR IN jacks on the KXV3 option module. It would be possible to redesign the KBPF3's lowest-frequency filter to improve sensitivity below 250 kHz. However, the receiver uses PIN diodes extensively, and the rolloff from this band-pass filter helps prevent intermod in the diodes. I can see that we should clarify this topic further in the FAQ and installation manual. 73, Wayne N6KR On Apr 6, 2015, at 4:01 PM, Roger D Johnson n...@roadrunner.com wrote: My new boards arrived today. I popped one into the K3 for some testing. I was especially interested in the low frequency performance as I like to DX the LF broadcasts from 153 to 279 kHz. What I found was that below 400 kHz, the noise level rises and at 100 kHz it's almost 20 over 9 on the S meter! I calibrated my NaP3 spectrum analyzer program and took some measurements of the noise level. 500 kHz -127 dbm 400 -127 300 -124 200 -113 100 -93 That's a 34 db increase in noise level!! Is this the way the new boards are supposed to work? I expected a decrease in sensitivity below 500 kHz but not this. Any ideas? 73, Roger __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] SSB net results, April 5, 2015
We typically have several relays. Often in So CA, the midwest, TX and the East (GA on Sunday). Anybody can jump in with relays they can hear. A question was asked about the bicycle mobile station. That is John, N6JW, in CA. Not every week. Phil On Apr 6, 2015, at 10:47 AM, Roger Stein burch.cr...@gmail.com wrote: Hi Phil, Do you make it a practice to have a relay station listen for east coast stations? It sounds from the mention of thanks to all the help you do. I listen from time to time but mostly come up blank. Glad to hear you are healing, it takes time! A member of the Been there, done that group! 73, Roger K7SJ/VE1 Halifax NS, K3 #75 formerly WA7BOC in WA. On Mon, Apr 6, 2015 at 12:59 PM, Phil Shepard ph...@riousa.com mailto:ph...@riousa.com wrote: It is good to be healing and back on the SSB net. Thanks for all of the help. We had 22 participants this week. Here are the stations: CallNameQTH RIG WD5MDavid AZ K3 6493 WB9JNZ EricIL K3 4017 WM6PSteve GA K3 8133 KM4IK Ian GA K3 281 N6JWJohnCA K3 936 KC0XT David CA KX3 6980 K5ZCJ Larry OK K3 6592 KD8DZ MikeOH K3 5905 W0CZKen ND K3 457 K8NUCarlOH K3 7976 N4WCQ RickKY K3 8160 W7QHD KurtAZ K2 1538 W8OVDaveTX K3 3139 K7BRR BillAZ K3 5545 WA0BEU Keith CO KX3 7048QRP W0SGM Scott IA K3 8898 K6WDE/KH6 Steve HI KX3 4599QRP KC9LIF KentIL K2 6896 QRP W4DML DougTN K3 6433 KF5YSZ OronTX K2 1682 K4BKM Brian NC K3 8893 NS7PPhilOR K3 1826 73, Phil, NS7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net http://www.qsl.net/ Please help support this email list: http://www.qsl.net/donate.html http://www.qsl.net/donate.html Message delivered to burch.cr...@gmail.com mailto:burch.cr...@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] What do I do now?
Thank you everyone for all the great tips. I ordered Fred's book today and I look forward to following the rest of your recommendations! Listen for me soon from the middle of the Pacific! Mike Eddy WA7YET Maui, Hawaii -- View this message in context: http://elecraft.365791.n2.nabble.com/What-do-I-do-now-tp7601036p7601057.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] What do I do now?
Download the Elecraft KX3 utility, and make a configuration backup before you do anything. Next, check the firmware version and upgrade that using the same utility. Read the manual and have a play with the functions to see what they do. Later on, you may want to do things like per-band I/Q nulling and temperature compensatin calibration procedures, but those can wait until you've had a chance to become more familiar with the radio. Enjoy! 73, Matt VK2RQ On 6 Apr 2015, at 2:06 pm, WA7YET mike...@gmail.com wrote: I purchased a KX3 when they were first introduced. Then life got in the way and all non-essentials were put on hold. Now things have improved and I've been thinking about breaking out my brand new KX3. What have I missed in my absence, and whats the best way to bring this beauty up to speed? Thanks in advance. Mike Eddy WA7YET -- View this message in context: http://elecraft.365791.n2.nabble.com/What-do-I-do-now-tp7601036.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to matt.vk...@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] What do I do now?
Mike, You do not have to do much at all. Download the latest KX3 Utility and then update to the latest firmware and operate. Then at a more leisurely pace, go to the Elecraft website and review the KX3 hardware updates available - you do not have to do any of them unless you want to do it or have a particular problem associated with those upgrades. Also review the KX3 Application Notes and do any of those that you would like. There is one that you should check on before installing batteries, and that is the one dealing with the battery holder mounting screws - you may or may not have the problem mentioned. You might also want to apply some epoxy glue around the input power jack, especially if you are not using the right angle power plug. The power jack on very early KX3s were not glued and the power jack could break away from the board causing intermittent power problems. I did have that problem with mine. I have the first KX3 that came off the production line and have not yet found the need to do any of the hardware upgrades, but I have done some of the procedures in the application note, not because it was needed, but I wanted to 'walk' through the procedure for the experience. 73, Don W3FPR On 4/6/2015 1:06 AM, WA7YET wrote: I purchased a KX3 when they were first introduced. Then life got in the way and all non-essentials were put on hold. Now things have improved and I've been thinking about breaking out my brand new KX3. What have I missed in my absence, and whats the best way to bring this beauty up to speed? Thanks in advance. Mike Eddy WA7YET __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] WTB Trimble ThunderBolt for K3EXREF / QS1R
Max, I bought one of the BG7TBL GPSDO from the same seller on eBay. I actually was just looking for a 10 MHz distribution amplifier and found that he was selling the GPSDO along with matching Distribution amp for a very good price. There were options of a square wave output version or a sine wave output (which is what I purchased). The 8 output Distribution amp also contains a Morion 10 MHz double oven oscillator as well, which takes over if the input signal from the GPSDO is disconnected. I was not aware the Morion oscillator was doubling the frequency to reach 10 MHz, I have not found any documentation that mentions that anywhere else. The device is marked as 10 MHz. The included 12 V power supplies work fine, however they are wall warts with I think American 2 pin plugs, which need adapters to fit UK mains sockets. You need a fair amount of current for the ovens when they are heating up, so cannot just substitute a 1 amp supply. I opened up both units and the construction is very well done. No schematic or block diagram was supplied, though you can read what some of the chips are, in particular the GPS receiver is an NEO-6M. They may not satisfy the Time Nuts in every way, but they are good enough for for my uses as a stable 10 MHz for locking other oscillators. There is also a serial port (at true RS-232 levels so beware if you try to connect it to something like an Arduino unless you build a level shifter). It outputs the usual GPS NMEA sentences. I do have a another time and frequency standard which is an old HP Z3801A, it is probably better, but for my uses I would not be able to tell the difference. The HP is much larger, requires a 50 Volt supply so not nearly as portable. It also cost a lot more when I bought it on eBay quite a few years ago. 73 David Anderson GM4JJJ On 6 Apr 2015, at 00:44, M. George m.matthew.geo...@gmail.com wrote: A follow up to my write up... I should have included more details from personal emails I received from Dave, G3TJP. Bob W7AVK also mentioned the BG7TBL GPS Disciplined Clock and I totally got my wires crossed and didn't mention G3TJP in my write-up. Sigh Apologies to Mr. Lankshear... Dave took some time in a personal email to point out the follow about the BG7TBL which is going for ~144.00 on ebay... it really is a nice package... here are some of Dave's comments (in hindsight, I wonder if this would have been the way to go): G3TJP: It’s a very neat and small unit, very professionally produced and comes complete with power supply and GPS antenna. I bought one and then a second one as a gift to a good friend. It uses the Morion double oven 10MHz xtal oscillator, or equivalent. The output is a decent sine wave with just enough distortion to give good harmonics at 10MHz intervals up to at least 50MHz, which is as far as I’ve checked. The Morion is actually a 5MHz oscillator that’s doubled to 10MHz, so you have a usable, locked signal at 5MHz also. Dave also mentioned that the seller 'fly-xy' is a decent guy and will ben over backwards to help you as you treat him fairly. i.e. if something needs to be returned or corrected. Plus, this unit is a turnkey package and he also sells a 10mhz distribution amplifier that looks interesting... another BG7TBL design. KE5FX has also reviewed Bob W7AVK's BG7TBL and has a nice comparison write up on his website (KE5FX of Lady Heather fame). The comparison is easy to find on KE5FX's site. Again, thanks to everyone that had input... I tried to mention everyone that pointed me in the right direction off the list and leaving out Dave G3TJP was my mistake. Regards, Max NG7M __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] FS KRC2 kit
Purchased but never assembled. retail $159 ... $120 + shipping Dennis, K7FL __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] P3SVGA Resolution
Hi Doug, Those resolutions do not have to match your monitor exactly. For example, you can run 1440x900 on a monitor that is capable of displaying 1920x1080 or greater.Higher resolutions on the P3/SVGA will show more detail (more pixels per span) but require slower update rates (more FFT points). For example I am using a monitor capable of much higher resolution, but operate the P3/SVGA at 1280x1024 or 1440x900 as these give plenty of detail with higher update rates. -Paul -- Paul Saffren - N6HZ Project Manager Elecraft Inc. 831-763-4211 x122 www.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
[Elecraft] SSB net results, April 5, 2015
It is good to be healing and back on the SSB net. Thanks for all of the help. We had 22 participants this week. Here are the stations: CallNameQTH RIG WD5MDavid AZ K3 6493 WB9JNZ EricIL K3 4017 WM6PSteve GA K3 8133 KM4IK Ian GA K3 281 N6JWJohnCA K3 936 KC0XT David CA KX3 6980 K5ZCJ Larry OK K3 6592 KD8DZ MikeOH K3 5905 W0CZKen ND K3 457 K8NUCarlOH K3 7976 N4WCQ RickKY K3 8160 W7QHD KurtAZ K2 1538 W8OVDaveTX K3 3139 K7BRR BillAZ K3 5545 WA0BEU Keith CO KX3 7048QRP W0SGM Scott IA K3 8898 K6WDE/KH6 Steve HI KX3 4599QRP KC9LIF KentIL K2 6896 QRP W4DML DougTN K3 6433 KF5YSZ OronTX K2 1682 K4BKM Brian NC K3 8893 NS7PPhilOR K3 1826 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 Message delivered to arch...@mail-archive.com
[Elecraft] 2-30 MHz Transmit?
Can someone furnish the exact unlocked or MARS transmit frequency specifications for the K2, KX3 and K3? I think some of these radios may have gaps - due to RF filtering, IF, etc. Also, what about the unlocked transmit specs for VHF in these radios? Thanks, Jay W6CJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] 2-30 MHz Transmit?
Hi Jay, I use my older K3 and a newer one on MARS frequencies. The KX3 is used as a MARS ECOM / mobile unit with the KXPA100 amp. The K3 has a TX donut hole around the 8.2 MHz IF. I think TX is locked out from 7.5 to 9.0 MHz (if memory serves). The KX3 has no such restriction, being a Zero IF transceiver. Elecraft customer support can assist you with the unlock programs needed. You may have to supply your MARS credentials, but I'm not sure how that is handled today. It's been a while since I unlocked my radios here. Except for the K3's IF range, I've found no problems with TX and RX from around 2.8 MHz to 25 MHz. KBPF3 use is recommended though, so that you have enough gain between ham bands. Otherwise, the sensitivity falls off in between bands. Note: There is very little MARS / SHARES activity above 20 MHz. I'm also using the KX3's 2m module to work an above-and-below MARS VHF repeater split, plus the odd set of simplex frequencies NMCM has around 2m. Again, from memory, Elecraft specifies performance inside the ham bands. I don't believe there are any published specs for general coverage. I haven't found any problems with between-band operation - plenty of sensitivity and dynamic range, etc. 73! matt W6NIA / NNN0UET On Mon, 6 Apr 2015 09:37:12 -0700, you wrote: Can someone furnish the exact unlocked or MARS transmit frequency specifications for the K2, KX3 and K3? I think some of these radios may have gaps - due to RF filtering, IF, etc. Also, what about the unlocked transmit specs for VHF in these radios? Thanks, Jay W6CJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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 mzil...@roadrunner.com Matt Zilmer, W6NIA -- Always store beer in a dark place. -R. Heinlein __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] 2-30 MHz Transmit?
Jay, The K2 is ham bands only, but it will tune (and transmit) slightly outside the ham bands - how far depends on the particular K2. There is no way to open it up further. The K3 blocks transmit (and receive) in the region of the 1st IF at 8.215 kHz - I forget how wide the guard band really is. The CB band at 25MHz is also blocked. If you must operate well outside the ham bands, you may want to install the KBPF3 option because the stock bandpass filters are peaked in the ham bands and receive will fall off as you move further away from the ham band edges. The KX3 can be opened for transmit (except for the CB band) most anywhere in the RF spectrum. If you have a valid need to transmit outside the ham bands (MARS licensee or other), contact K3support to obtain the instructions. I do not know about the unlocked VHF spectrum. 73, Don W3FPR On 4/6/2015 12:37 PM, J wrote: Can someone furnish the exact unlocked or MARS transmit frequency specifications for the K2, KX3 and K3? I think some of these radios may have gaps - due to RF filtering, IF, etc. Also, what about the unlocked transmit specs for VHF in these radios? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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
