Re: [Elecraft] K3, diversity and noise reduction
Tony, You are looking at information about how to compensate two unequal receivers for true diversity reception - two orthogonally opposed antennas receiving the same signal. The K3 makes that easy with a sub-receiver that is identical with the main receiver and they are phase locked together in diversity. When placed in diversity mode (using two antennas hopefully having different polarity or directional characteristics), you will hear enhancement of the reception from whichever antenna is receiving the best signal - you have each receiver in each of your ears, and the human brain will respond to the best signal. No phase adjustment is necessary. OTOH, if you are looking to reduce the noise of your plasma TV and routers, that is another form of reception that could (but not necessarily) be related to diversity. You would want to use a directional antenna aimed at the noise source to feed one receiver while being able to adjust the amplitude and phase of that noise signal to cancel out the noise source. It is possible that you could use the K3 with subRX to do that, the AF and RF gain controls will do the amplitude part of the process and if you provide an external mechanism for changing the phase of the two antennas, you may be successful. The easiest phase change is simply to flip the noise receive antenna terminals which should achieve a 180 degree phase shift, but the actual phase shift will depend on several other factors such as the length of the antenna feedlines and the physical placement of the antennas (which control the arrival time of the noise signal at the antennas). So, yes, it is possible that with suitable antennas placed properly, the K3 with subRX *could* serve as a noise cancelling system, but it was not designed for that purpose, it was designed to counter propagation effects such as fading due to polarization. 73, Don W3FPR On 5/25/2015 9:00 PM, Tony McRae wrote: I have been watching some youtube clips showing how by adjusting the phase and amplitude of two received signals on a diversity receiver local noise can be reduced by more than 20db. This would be particularly useful to me as I have the dirtiest plasma TV on one side of me and a gaggle of cheap ADSL routers on the other. When pointed at them with my yagi the noise floor on 20-15m is over S7. The equipment used in the clip was the ANAN 100D SDR. Is anyone aware if this technique is possible using the K3 dual receivers? I have not found any place in the manual where it is possible to alter the phase of the secondary or primary signals. Thanks for reading this Tony VK4CH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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 w3...@embarqmail.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] IC-2800
The only thing non-standard is an HM-133V mic which replaced the original that failed a number of years ago. Any ideas welcome. i bought an icom replacement mic for 9.99 shipped from china on ebay. even said icom on the mic... worked great, but after two weeks the jacket on the mic started to fall apart... literally falling off the wire mic stil works...with a tt pad i had thought the order would be worth the cable assembly oops had it backwards... 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] IC-2800
have you tried RT systems... Will software for a IC-2820 work with the 2800 ?? see https://www.rtsystemsinc.com/IC-2820-programming-software-and-USB-cable-s/1869.htm I am using their software on a W7 64 bit machine and they update. steve wb3lgc On 26-May-15 7:49 PM, Fred Jensen wrote: Msg off to ICOM Tech Support. We'll see how this compares to Elecraft support and service. I really need to reorganize the memories on the 2800, the UI through the control head is marginally OK when just adding a new one, it's a non-starter for a reorg. The programming SW won't run on 64-bit Windoze. I finally got a virtual machine running using Virtual Box, installed an old version of XP, and voila! the ICOM software runs. Now I find I can't get the radio into clone mode. Ctrl-Alt-Delete for an IC2800 is mic UP button and 4th button down on the left side of the controller while powering it up. Done it at least 15 times, and it's still just a radio, no comm out the port. The only thing non-standard is an HM-133V mic which replaced the original that failed a number of years ago. Any ideas welcome. If Elecraft were to make a 2m/70cm mobile radio with a remote control head and an LCD TV for a display screen, I'd be the first to order. :-) 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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 sm.shearer...@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] IC-2800
Have you tried Chirp for managing memories? It is tested with the IC-2820, so it is worth a shot with the I-2800. http://chirp.danplanet.com/projects/chirp/wiki/Home wunder K6WRU CM87wj http://observer.wunderwood.org/ (my blog) On May 26, 2015, at 4:49 PM, Fred Jensen k6...@foothill.net wrote: Msg off to ICOM Tech Support. We'll see how this compares to Elecraft support and service. I really need to reorganize the memories on the 2800, the UI through the control head is marginally OK when just adding a new one, it's a non-starter for a reorg. The programming SW won't run on 64-bit Windoze. I finally got a virtual machine running using Virtual Box, installed an old version of XP, and voila! the ICOM software runs. Now I find I can't get the radio into clone mode. Ctrl-Alt-Delete for an IC2800 is mic UP button and 4th button down on the left side of the controller while powering it up. Done it at least 15 times, and it's still just a radio, no comm out the port. The only thing non-standard is an HM-133V mic which replaced the original that failed a number of years ago. Any ideas welcome. If Elecraft were to make a 2m/70cm mobile radio with a remote control head and an LCD TV for a display screen, I'd be the first to order. :-) 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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 wun...@wunderwood.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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, diversity and noise reduction
It would be interesting to see if that feature could be added. Original message From: Don Wilhelm w3...@embarqmail.com Date: 05/26/2015 8:26 PM (GMT-05:00) To: Tony McRae a...@ttecs.com.au, elecraft@mailman.qth.net Subject: Re: [Elecraft] K3, diversity and noise reduction Tony, You are looking at information about how to compensate two unequal receivers for true diversity reception - two orthogonally opposed antennas receiving the same signal. The K3 makes that easy with a sub-receiver that is identical with the main receiver and they are phase locked together in diversity. When placed in diversity mode (using two antennas hopefully having different polarity or directional characteristics), you will hear enhancement of the reception from whichever antenna is receiving the best signal - you have each receiver in each of your ears, and the human brain will respond to the best signal. No phase adjustment is necessary. OTOH, if you are looking to reduce the noise of your plasma TV and routers, that is another form of reception that could (but not necessarily) be related to diversity. You would want to use a directional antenna aimed at the noise source to feed one receiver while being able to adjust the amplitude and phase of that noise signal to cancel out the noise source. It is possible that you could use the K3 with subRX to do that, the AF and RF gain controls will do the amplitude part of the process and if you provide an external mechanism for changing the phase of the two antennas, you may be successful. The easiest phase change is simply to flip the noise receive antenna terminals which should achieve a 180 degree phase shift, but the actual phase shift will depend on several other factors such as the length of the antenna feedlines and the physical placement of the antennas (which control the arrival time of the noise signal at the antennas). So, yes, it is possible that with suitable antennas placed properly, the K3 with subRX *could* serve as a noise cancelling system, but it was not designed for that purpose, it was designed to counter propagation effects such as fading due to polarization. 73, Don W3FPR On 5/25/2015 9:00 PM, Tony McRae wrote: I have been watching some youtube clips showing how by adjusting the phase and amplitude of two received signals on a diversity receiver local noise can be reduced by more than 20db. This would be particularly useful to me as I have the dirtiest plasma TV on one side of me and a gaggle of cheap ADSL routers on the other. When pointed at them with my yagi the noise floor on 20-15m is over S7. The equipment used in the clip was the ANAN 100D SDR. Is anyone aware if this technique is possible using the K3 dual receivers? I have not found any place in the manual where it is possible to alter the phase of the secondary or primary signals. Thanks for reading this Tony VK4CH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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 w3...@embarqmail.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 hlyin...@yahoo.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Blown finals
Jack, Forget about the current limited power source, there is another way. Since your new finals are obviously blown, remove them and then power on the K2 and do a TUNE while monitoring the voltage at the solder pads for Q7 or Q8. If the voltage is not in the range of 0.62 to 0.64 volts, replace Q11 and Q13 and then remeasure. If the voltage is still not within that range, look for other problems in the PA transistor bias circuit. Only after the bias voltage is correct, install the new PA transistors. The K2PAKIT contains replacement transistors for Q11 and Q13. I recommend that you use the K2PAKIT for replacement of the PA transistors because the PA transistors are matched - if you obtained the replacements from another source, they may have not been matched. BTW - the C markings on the PA transistor solder pads are for the Collector (Cathode has no meaning for transistors, only diodes). 73, Don W3FPR On 5/26/2015 9:19 AM, artus wrote: Thanks Jack, That sounds like a very reasonable starting point. We'll first check to see it the finals are indeed blown; because my friend had a current limited supply set at 1 amp, perhaps not. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] IC-2800
Msg off to ICOM Tech Support. We'll see how this compares to Elecraft support and service. I really need to reorganize the memories on the 2800, the UI through the control head is marginally OK when just adding a new one, it's a non-starter for a reorg. The programming SW won't run on 64-bit Windoze. I finally got a virtual machine running using Virtual Box, installed an old version of XP, and voila! the ICOM software runs. Now I find I can't get the radio into clone mode. Ctrl-Alt-Delete for an IC2800 is mic UP button and 4th button down on the left side of the controller while powering it up. Done it at least 15 times, and it's still just a radio, no comm out the port. The only thing non-standard is an HM-133V mic which replaced the original that failed a number of years ago. Any ideas welcome. If Elecraft were to make a 2m/70cm mobile radio with a remote control head and an LCD TV for a display screen, I'd be the first to order. :-) 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] KAT500
Larry, Tune each KAT500 band segment into the antenna of choice - referred to as Training the Tuner with the tuner in AUTO. After doing that, change the KAT500 to MAN and it will not re-tune - it will restore the settings for that antenna and frequency. I suspect you are operating with the KAT500 in AUTO mode, and that will cause tuning anomalies. OK, the 'labels' AUTO and MAN may not be what we have previously been accustomed to, but do the KAT500 'training' exercise, then switch to MAN and your problem should be resolved. 73, Don W3FPR On 5/26/2015 8:50 AM, Larry Snyder wrote: Good Morning I have a KAT500 with a vertical on ANT 1 and a Hex on ANT 3. I go to 20 meters with Auto flashing an put the radio in AM and the KAT500 tunes and finds a good SWR - all is fine. Then I play around with other frequencies and then come back and for some reason the KAT500 appears to not remember the tuning parameters and then retunes again for the same frequency on the same antenna. Why is this?? This happens frequently (i.e.: not remembering the settings and going into retune). Also, the SWR meter on the K3 is always blank (i.e.: no bars) while on the K3 and KPA500 I see the SWR at 1.5?? 73s from Colombia Larry HK2LS -- Larry Snyder, RN.ORG Thousands of Nurses Depend on www.RN.org http://www.RN.org for their Nursing CEUs Daily! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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 w3...@embarqmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3, diversity and noise reduction
Tony, I strongly recommend the DX Engineering NCC-1 for noise cancellation: http://www.dxengineering.com/parts/dxe-ncc-1 It is very effective at nulling out offending noise sources -- BUT, it will do so for only one source at a time. You may find that nulling out one of your sources will frequently be enough, depending upon the direction of your yagi at the time. I've had one for about three years, and wouldn't want to be without it. 73, Dale WA8SRA I have been watching some youtube clips showing how by adjusting the phase and amplitude of two received signals on a diversity receiver local noise can be reduced by more than 20db. This would be particularly useful to me as I have the dirtiest plasma TV on one side of me and a gaggle of cheap ADSL routers on the other. When pointed at them with my yagi the noise floor on 20-15m is over S7. The equipment used in the clip was the ANAN 100D SDR. Is anyone aware if this technique is possible using the K3 dual receivers? I have not found any place in the manual where it is possible to alter the phase of the secondary or primary signals. Thanks for reading this Tony VK4CH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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, diversity and noise reduction
That's a good idea, Dave. The best place to do it would probably be inside the DSP on the K3 itself, but failing that, you could do it in your PC, and the advantage is you could give a better visual indication of what is going on that what could be achieved on the K3's LCD display. 73, Matt VK2RQ On Wed, May 27, 2015 at 2:01 PM, David Gilbert xda...@cis-broadband.com wrote: I have on three different occasions requested of Elecraft that such a feature be added to the K3. Two of those requests never received a response, while the third got a we'll see if anyone in engineering is interested reply (apparently nobody was). Personally, I think this is a significantly missed opportunity to expand the usefulness of diversity reception in the K3, especially now that the new synths retain phase lock when changing frequency. If even only one receiver in the K3 had the ability to time shift the audio signal, it would work. The K3 already has separate volume controls and already has the ability to mix the two channels. With two antennas separated horizontally (i.e., two verticals a suitable distance apart), the phase could be adjusted to boost a desired signal by roughly 3db or null an undesired signal (noise or QRM) by 20 to 30 db or more (depending upon how stable the signals were). Directional antennas are not needed at all. I also think it would be interesting, and maybe useful, to use two antennas separated vertically, such as a couple of dipoles or yagis on a tower. Adjusting the phase could potentially drop a severe notch on an interfering signal IN THE SAME DIRECTION as a desired signal. Phase is preserved in the down conversion to audio so all this could be accomplished at the audio level. I'm not saying that's the best place to do it, but worst case I'm going to learn enough software code to do it myself using the sound card of my computer since nobody else seems interested. 73, Dave AB7E On 5/26/2015 5:45 PM, Harry Yingst via Elecraft wrote: It would be interesting to see if that feature could be added. Original message From: Don Wilhelm w3...@embarqmail.com Date: 05/26/2015 8:26 PM (GMT-05:00) To: Tony McRae a...@ttecs.com.au, elecraft@mailman.qth.net Subject: Re: [Elecraft] K3, diversity and noise reduction Tony, You are looking at information about how to compensate two unequal receivers for true diversity reception - two orthogonally opposed antennas receiving the same signal. The K3 makes that easy with a sub-receiver that is identical with the main receiver and they are phase locked together in diversity. When placed in diversity mode (using two antennas hopefully having different polarity or directional characteristics), you will hear enhancement of the reception from whichever antenna is receiving the best signal - you have each receiver in each of your ears, and the human brain will respond to the best signal. No phase adjustment is necessary. OTOH, if you are looking to reduce the noise of your plasma TV and routers, that is another form of reception that could (but not necessarily) be related to diversity. You would want to use a directional antenna aimed at the noise source to feed one receiver while being able to adjust the amplitude and phase of that noise signal to cancel out the noise source. It is possible that you could use the K3 with subRX to do that, the AF and RF gain controls will do the amplitude part of the process and if you provide an external mechanism for changing the phase of the two antennas, you may be successful. The easiest phase change is simply to flip the noise receive antenna terminals which should achieve a 180 degree phase shift, but the actual phase shift will depend on several other factors such as the length of the antenna feedlines and the physical placement of the antennas (which control the arrival time of the noise signal at the antennas). So, yes, it is possible that with suitable antennas placed properly, the K3 with subRX *could* serve as a noise cancelling system, but it was not designed for that purpose, it was designed to counter propagation effects such as fading due to polarization. 73, Don W3FPR On 5/25/2015 9:00 PM, Tony McRae wrote: I have been watching some youtube clips showing how by adjusting the phase and amplitude of two received signals on a diversity receiver local noise can be reduced by more than 20db. This would be particularly useful to me as I have the dirtiest plasma TV on one side of me and a gaggle of cheap ADSL routers on the other. When pointed at them with my yagi the noise floor on 20-15m is over S7. The equipment used in the clip was the ANAN 100D SDR. Is anyone aware if this technique is possible using the K3 dual receivers? I have not found any place in the manual where it is possible to alter the phase of the secondary or primary signals. Thanks for reading this Tony VK4CH
Re: [Elecraft] K3, diversity and noise reduction
I have on three different occasions requested of Elecraft that such a feature be added to the K3. Two of those requests never received a response, while the third got a we'll see if anyone in engineering is interested reply (apparently nobody was). Personally, I think this is a significantly missed opportunity to expand the usefulness of diversity reception in the K3, especially now that the new synths retain phase lock when changing frequency. If even only one receiver in the K3 had the ability to time shift the audio signal, it would work. The K3 already has separate volume controls and already has the ability to mix the two channels. With two antennas separated horizontally (i.e., two verticals a suitable distance apart), the phase could be adjusted to boost a desired signal by roughly 3db or null an undesired signal (noise or QRM) by 20 to 30 db or more (depending upon how stable the signals were). Directional antennas are not needed at all. I also think it would be interesting, and maybe useful, to use two antennas separated vertically, such as a couple of dipoles or yagis on a tower. Adjusting the phase could potentially drop a severe notch on an interfering signal IN THE SAME DIRECTION as a desired signal. Phase is preserved in the down conversion to audio so all this could be accomplished at the audio level. I'm not saying that's the best place to do it, but worst case I'm going to learn enough software code to do it myself using the sound card of my computer since nobody else seems interested. 73, Dave AB7E On 5/26/2015 5:45 PM, Harry Yingst via Elecraft wrote: It would be interesting to see if that feature could be added. Original message From: Don Wilhelm w3...@embarqmail.com Date: 05/26/2015 8:26 PM (GMT-05:00) To: Tony McRae a...@ttecs.com.au, elecraft@mailman.qth.net Subject: Re: [Elecraft] K3, diversity and noise reduction Tony, You are looking at information about how to compensate two unequal receivers for true diversity reception - two orthogonally opposed antennas receiving the same signal. The K3 makes that easy with a sub-receiver that is identical with the main receiver and they are phase locked together in diversity. When placed in diversity mode (using two antennas hopefully having different polarity or directional characteristics), you will hear enhancement of the reception from whichever antenna is receiving the best signal - you have each receiver in each of your ears, and the human brain will respond to the best signal. No phase adjustment is necessary. OTOH, if you are looking to reduce the noise of your plasma TV and routers, that is another form of reception that could (but not necessarily) be related to diversity. You would want to use a directional antenna aimed at the noise source to feed one receiver while being able to adjust the amplitude and phase of that noise signal to cancel out the noise source. It is possible that you could use the K3 with subRX to do that, the AF and RF gain controls will do the amplitude part of the process and if you provide an external mechanism for changing the phase of the two antennas, you may be successful. The easiest phase change is simply to flip the noise receive antenna terminals which should achieve a 180 degree phase shift, but the actual phase shift will depend on several other factors such as the length of the antenna feedlines and the physical placement of the antennas (which control the arrival time of the noise signal at the antennas). So, yes, it is possible that with suitable antennas placed properly, the K3 with subRX *could* serve as a noise cancelling system, but it was not designed for that purpose, it was designed to counter propagation effects such as fading due to polarization. 73, Don W3FPR On 5/25/2015 9:00 PM, Tony McRae wrote: I have been watching some youtube clips showing how by adjusting the phase and amplitude of two received signals on a diversity receiver local noise can be reduced by more than 20db. This would be particularly useful to me as I have the dirtiest plasma TV on one side of me and a gaggle of cheap ADSL routers on the other. When pointed at them with my yagi the noise floor on 20-15m is over S7. The equipment used in the clip was the ANAN 100D SDR. Is anyone aware if this technique is possible using the K3 dual receivers? I have not found any place in the manual where it is possible to alter the phase of the secondary or primary signals. Thanks for reading this Tony VK4CH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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 w3...@embarqmail.com __ Elecraft mailing
[Elecraft] P3 Noise
I was doing some power line noise tracking with my AM VHF radio and brought it into the shack and laid it on the desk with no antenna and started receiving a loud buzz from it. The tracker radio was tuned in the 135 Mhz area. I moved it around to all the suspects like computer monitors, TV, computer etc but it turned out the noise was coming from the P3. I took all the cables off the P3 and used a battery to power it and the noise was still there very loud. I am always working to keep the RF noise low from all the items in the shack so not sure what to do about this one. The This P3 was factory assembled. Has anyone else seen this problem? 73 Mike K4PI __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3/0-Mini - Experiences?
I'm in the midst of a terrible urge to spend some $$'s and the K3/0'-Mini's siren call is hard to resist. I've done a bit of reading on the RemoteRig products and there is scare info on the K3/0 mini. I'd love to hear any testimonials, rig setups, real-world latency commentary, or even how you manage the firmware. Anyone play with the codecs? Thoughts on the different audio quality? My current though is using the K3/0-Mini on the same local network and I do some occasional work travel, might be nice to take it with me. Comments encouraged!!! 73 de K8OI - K8OI mailto:jlbat...@gmail.com (804) 592-1068 -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-0-Mini-Experiences-tp7603508.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] Blown finals
Thanks Jack, That sounds like a very reasonable starting point. We'll first check to see it the finals are indeed blown; because my friend had a current limited supply set at 1 amp, perhaps not. 73, Jack (W0FNQ) -- View this message in context: http://elecraft.365791.n2.nabble.com/Blown-finals-tp7603503p7603510.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] Running the KX3 and KXPA100 Off Battery
Phil, I had posted this to the KX3 list a few months back. I have a Bioenno LiFePO4 12V/12A (BLF-1212W) battery pack for my KX3 station. The battery is powering the KX3, my KXPA100 at full power and a pair of West Mountain Radio amplified speakers (the new PX3 was not in the mix). I have been testing on 160M with the group I hang around with and I have been doing a lot more transmission cycles than normal (usually on 3 or 4 hams in the group) so I am transmitting frequently. I terminated the test when I reached 11V as indicated on the KX3 and this is the amount of operating I was able to get on a single charge. Day 13 hours Day 22 hours Day 32 hours Day 42 hours Day 51/2 hour plus 3 additional hours on receive. Even at the end no untoward issues with the signal was reported. Pretty pleased so far for such a small battery. Gary Mitchelson NC3Z/4 Pamlico County, NC FM15 www.mitchelson.org On 5/26/2015 13:13, Phil Hystad wrote: I don’t have a KXPA100 yet to go with my KX3 but when I get one (soon) it will be used almost entirely in portable operation off batteries — in particular: A123 Lithium battery packs. Currently have two 2.5 Amp-Hour packs and will be buying at least one 7.5 Amp-Hour pack (maybe two). Although many times I will be able to recharge my battery packs in the field (maybe not always conveniently) I would like to know about how much time (in real operating practice) I would expect from, let’s say 5 amp-hours of available charge. I could do computations and estimate duty cycle but I would also like to have real-world experience if someone has done something similar. My operating configuration would be: CW only and operating with enough power out to make good contacts (maybe only 50 watts or so). Currently, I have been limited to QRP to 10 watts on my KX3 and a number of times I had wanted more power — thus my motivation for using this amplifier and battery power. Thanks for any help you can provide — actual field experience preferred. 73, phil, K7PEH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] [KX3] Can you switch between two configuration setting?
I've started using my KX3 for JT65-HF, in addition to portable SSB SOTA operation. Obviously the radio is configured differently for both modes (switch on freq, mode, pre-amp setting, power and a number of menu based settings like Mic Bias, Mic Btn, AFX MD). Yesterday I got into the field and realized I'd not changed back from JT65 settings to SSB settings and while it did not take long to do, my question is, Is there a way to set up the KX3 so I can just recall one of two configuration settings from the front panel without use of KX3 utility to quickly switch between the correct settings for these two operating modes? 73's Gary K6YOA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Looking for Field Day Site, Columbia SC
Henry... The poster is/was looking for a site where a group was going to hold FD, -not- a place to hold a FD event. 73! Ken - K0PP On Tue, May 26, 2015 at 11:16 AM, Henry Pollock - K4TMC kilo4...@gmail.com wrote: Ian, One potential site may be the Congaree National Park. It is just south of Columbia. They do have a camping site location, there are rest rooms and plenty of parking for cars and trucks. I just did a drive-by and short visit last week on the way to a job in Augusta. There is no admittance fee to enter the park. The negatives are that it is in a low area along the Congaree River and the mosquito factor may be high in June. Not sure what their restrictions may be on radio operations. 73, Henry - K4TMC Raleigh, NC On Tue, May 26, 2015 at 10:47 AM, Ian - Ham km4ik@gmail.com wrote: All, I have an acquaintance in the Columbia, SC, area, who is interested in getting into amateur radio. I suggested that Field Day would be a great place for him to really get a good look at today's amateur radio. When I checked the ARRL Field Day Locator, there are no sites listed yet for Columbia. Does anyone on list know of any Field Day activities in Columbia? He lives in the Lexington/West Columbia/South Congaree areas, but I'll happily provide him info on any Field Day site anywhere in Metro Columbia. Thanks for your help. 73 de, --Ian Ian Kahn, KM4IK Roswell, GA EM74ua km4ik@gmail.com mailto:km4ik@gmail.com 10-10 #74624, North Georgia Chapter #2038 PODXS 070 #1962 K3# 281, P3 #688, KAT500 #860, KPA500 #1468 --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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 kilo4...@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 elecraftcov...@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] Running the KX3 and KXPA100 Off Battery
On Tue,5/26/2015 10:13 AM, Phil Hystad wrote: Thanks for any help you can provide — actual field experience preferred. You might want to reconsider your battery choices. Of what's available, LiFePO4 batteries seem to be in the sweet spot for operation of our gear. Their advantages include terminal voltage that matches our gear designed to work on 12-14V, a nice flat discharge curve, a much better safety profile than Li Ion, and less demanding charging requirements. I bought a BLF-1220W 20Ah pack from these folks, and loaned it and my KX3, KXPA100, and PX3 to a couple of guys who were activating a rare 6M grid. It's a demanding hike up a mountain to the site, so weight was a major factor. The low current drain of this rig on RX allowed them to work all day on that battery, and the terminal voltage was 13V when they went QRT. They also carried a second 20Ah pack loaned by W6GJB, but didn't need it. As luck would have it, the band never opened while they were there, so they made only 17 QSOs. They easily might have used up both batteries if the band had opened. http://www.bioennopower.com/pages/comm-equipment-ham-radio Note the weight of the battery I chose, and compare it to the other 20Ah batteries listed. Here's another excellent battery vendor. W6GJB bought his from them. Both companies provide intelligent applications advice by email and land line. http://www.batteryspace.com/ 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] Running the KX3 and KXPA100 Off Battery
Thanks Jim, I took a look and they appear to be cheaper than the A123 packs (the brief scan I did) — I may buy one or two. But, with my two 4S1P A123 battery packs have performed very well with the KX3 so far. Although, this is a KX3 running QRP to 10 watts. 73, phil On May 26, 2015, at 10:55 AM, Jim Brown j...@audiosystemsgroup.com wrote: On Tue,5/26/2015 10:13 AM, Phil Hystad wrote: Thanks for any help you can provide — actual field experience preferred. You might want to reconsider your battery choices. Of what's available, LiFePO4 batteries seem to be in the sweet spot for operation of our gear. Their advantages include terminal voltage that matches our gear designed to work on 12-14V, a nice flat discharge curve, a much better safety profile than Li Ion, and less demanding charging requirements. I bought a BLF-1220W 20Ah pack from these folks, and loaned it and my KX3, KXPA100, and PX3 to a couple of guys who were activating a rare 6M grid. It's a demanding hike up a mountain to the site, so weight was a major factor. The low current drain of this rig on RX allowed them to work all day on that battery, and the terminal voltage was 13V when they went QRT. They also carried a second 20Ah pack loaned by W6GJB, but didn't need it. As luck would have it, the band never opened while they were there, so they made only 17 QSOs. They easily might have used up both batteries if the band had opened. http://www.bioennopower.com/pages/comm-equipment-ham-radio Note the weight of the battery I chose, and compare it to the other 20Ah batteries listed. Here's another excellent battery vendor. W6GJB bought his from them. Both companies provide intelligent applications advice by email and land line. http://www.batteryspace.com/ 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 phys...@mac.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KAT500
Good Morning I have a KAT500 with a vertical on ANT 1 and a Hex on ANT 3. I go to 20 meters with Auto flashing an put the radio in AM and the KAT500 tunes and finds a good SWR - all is fine. Then I play around with other frequencies and then come back and for some reason the KAT500 appears to not remember the tuning parameters and then retunes again for the same frequency on the same antenna. Why is this?? This happens frequently (i.e.: not remembering the settings and going into retune). Also, the SWR meter on the K3 is always blank (i.e.: no bars) while on the K3 and KPA500 I see the SWR at 1.5?? 73s from Colombia Larry HK2LS -- Larry Snyder, RN.ORG Thousands of Nurses Depend on www.RN.org http://www.RN.org for their Nursing CEUs Daily! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Looking for Field Day Site, Columbia SC
Yes, the ARRL website lists all clubs in a given area. Ken - K0PP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Running the KX3 and KXPA100 Off Battery
On Tue,5/26/2015 12:33 PM, Fred Jensen wrote: Li-ion, in one or another of the variants, usually power laptops, cell phones, and Tesla's. They're pretty stable, you can take them on aircraft although there are some limits on total weight and packing. Not quite, Fred. A sample of a Li-ion pack must be tested in a certified lab before it can go on aircraft. See the right sidebar here. http://www.batteryspace.com/ Some of their products are UN 38.3 certified, but many are not. 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] OT: Looking for Field Day Site, Columbia SC
Oops...I have sinned! I did what I have seen others do - respond too quickly without fully understanding the question. I apologize for the misdeed. I will crawl back into my hole now...may the reflector gods forgive me... 73, Henry - K4TMC (with K3 #98 still going strong since birth) On Tue, May 26, 2015 at 2:32 PM, Rose elecraftcov...@gmail.com wrote: Henry... The poster is/was looking for a site where a group was going to hold FD, -not- a place to hold a FD event. 73! Ken - K0PP On Tue, May 26, 2015 at 11:16 AM, Henry Pollock - K4TMC kilo4...@gmail.com wrote: Ian, One potential site may be the Congaree National Park. It is just south of Columbia. They do have a camping site location, there are rest rooms and plenty of parking for cars and trucks. I just did a drive-by and short visit last week on the way to a job in Augusta. There is no admittance fee to enter the park. The negatives are that it is in a low area along the Congaree River and the mosquito factor may be high in June. Not sure what their restrictions may be on radio operations. 73, Henry - K4TMC Raleigh, NC On Tue, May 26, 2015 at 10:47 AM, Ian - Ham km4ik@gmail.com wrote: All, I have an acquaintance in the Columbia, SC, area, who is interested in getting into amateur radio. I suggested that Field Day would be a great place for him to really get a good look at today's amateur radio. When I checked the ARRL Field Day Locator, there are no sites listed yet for Columbia. Does anyone on list know of any Field Day activities in Columbia? He lives in the Lexington/West Columbia/South Congaree areas, but I'll happily provide him info on any Field Day site anywhere in Metro Columbia. Thanks for your help. 73 de, --Ian Ian Kahn, KM4IK Roswell, GA EM74ua km4ik@gmail.com mailto:km4ik@gmail.com 10-10 #74624, North Georgia Chapter #2038 PODXS 070 #1962 K3# 281, P3 #688, KAT500 #860, KPA500 #1468 --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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 kilo4...@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 elecraftcov...@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] Elecraft K1
I believe it is pa...@elecraft.com ... on their web page is the address and yes, those are still available, I just ordered them a couple weeks ago, have them installed and working now. Good Luck, Have a great day, --... ...-- Dale - WC7S in Wy Date: Tue, 26 May 2015 22:52:49 +0300 From: adi@gmail.com To: elecraft@mailman.qth.net Subject: [Elecraft] Elecraft K1 Hello, I want to buy two crystals for my K1, 26.050 and 18.100 and the LCD bezel if they are still available. Thanks! 73! Adi YO2LIW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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 daleput...@hotmail.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] OT: Looking for Field Day Site, Columbia SC
All, I have an acquaintance in the Columbia, SC, area, who is interested in getting into amateur radio. I suggested that Field Day would be a great place for him to really get a good look at today's amateur radio. When I checked the ARRL Field Day Locator, there are no sites listed yet for Columbia. Does anyone on list know of any Field Day activities in Columbia? He lives in the Lexington/West Columbia/South Congaree areas, but I'll happily provide him info on any Field Day site anywhere in Metro Columbia. Thanks for your help. 73 de, --Ian Ian Kahn, KM4IK Roswell, GA EM74ua km4ik@gmail.com mailto:km4ik@gmail.com 10-10 #74624, North Georgia Chapter #2038 PODXS 070 #1962 K3# 281, P3 #688, KAT500 #860, KPA500 #1468 --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Running the KX3 and KXPA100 Off Battery
I second Jim’s recommendation. I’ve been using a 12 aH AGM lead acid battery for about two years. It weighs a tad over 10 pounds. I purchased a 12 aH LiFePO battery from Bioennopower a couple weeks ago. Wow - what a difference! This one weighs about three pounds, and seems to last forever. I’ve been using it with my KX3 at 10 watts nearly every evening on the back patio and it’s still at the same voltage level as when I first charged it up. We’re planning a trip to the Philippines next year and I’m glad I got this lightweight unit to take along. Got their 117/220 charger for a couple dollars more, so I can charge it up here or there and not worry about the supply voltage. Also have a 28 watt solar panel that’s going along, in case there is one of the all-too-often “brown out” situations. 73, Jim / W6JHB On Tuesday, May 26, 2015, at Tuesday, 10:55 AM, Jim Brown j...@audiosystemsgroup.com wrote: On Tue,5/26/2015 10:13 AM, Phil Hystad wrote: Thanks for any help you can provide — actual field experience preferred. You might want to reconsider your battery choices. Of what's available, LiFePO4 batteries seem to be in the sweet spot for operation of our gear. Their advantages include terminal voltage that matches our gear designed to work on 12-14V, a nice flat discharge curve, a much better safety profile than Li Ion, and less demanding charging requirements. I bought a BLF-1220W 20Ah pack from these folks, and loaned it and my KX3, KXPA100, and PX3 to a couple of guys who were activating a rare 6M grid. It's a demanding hike up a mountain to the site, so weight was a major factor. The low current drain of this rig on RX allowed them to work all day on that battery, and the terminal voltage was 13V when they went QRT. They also carried a second 20Ah pack loaned by W6GJB, but didn't need it. As luck would have it, the band never opened while they were there, so they made only 17 QSOs. They easily might have used up both batteries if the band had opened. http://www.bioennopower.com/pages/comm-equipment-ham-radio Note the weight of the battery I chose, and compare it to the other 20Ah batteries listed. Here's another excellent battery vendor. W6GJB bought his from them. Both companies provide intelligent applications advice by email and land line. http://www.batteryspace.com/ 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 w6...@me.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Elecraft K1
Hello, I want to buy two crystals for my K1, 26.050 and 18.100 and the LCD bezel if they are still available. Thanks! 73! Adi YO2LIW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Running the KX3 and KXPA100 Off Battery
Phil, It appears that there are three types of batteries with lithium in their names ... Li-ion, Li-poly, and LiFePO4. Li-ion, in one or another of the variants, usually power laptops, cell phones, and Tesla's. They're pretty stable, you can take them on aircraft although there are some limits on total weight and packing. Li-poly are very small and light with a high energy density and are used mainly by RC hobbyists. I have a 750 mAh one for my KX1, it's a little smaller than a small matchbox and weighs an ounce or so. They're somewhat unstable, I wouldn't recommend internal mounting. I had one catch fire while I was operating, it was on a pigtail which I pulled loose and tossed it over the deck rail onto our gravel driveway. I always charge my current one outside. LiFePO4 seem to be very stable. I have a 4S1P A123 2.5 Ah pack for my K2. At full charge, it is almost 14 V which drops quickly to around 13.5 where it pretty much stays until almost depleted. With my K2 on CW in QRP field contests [flight of the bumbles], it has powered 3-4 hours of steady operation. So far, I get tired and hungry faster than I can run it down. It does require a cell-balancing charger, mine is a CellPro-Multi4 which will charge a variety of chemistries. Considering all, LiFePO4 seems to be the best choice ham use. Use great care with Li batteries of any flavor. They have an incredibly high energy density for their size and weight, and incredibly low internal resistance, so fuse the leads and don't ever short it. My 2.5 Ah pack will easily deliver 10 to 15 times that [25 - 40 A] into a short. You can spot weld with them and some of the larger ones would probably start my truck. 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.org On 5/26/2015 11:42 AM, Phil Hystad wrote: Thanks Jim, I took a look and they appear to be cheaper than the A123 packs (the brief scan I did) — I may buy one or two. But, with my two 4S1P A123 battery packs have performed very well with the KX3 so far. Although, this is a KX3 running QRP to 10 watts. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] KXPA100 Kit Review
This is mainly for those who are contemplating getting the KXPA100 to go along with a KX3 (with or without the PX3). Picked my KXPA100 kit up at the UPS customer center this morning about 9:15. Got it home about 10:00, unpacked and inventoried by 10:30 and completely assembled by 11:15. So far this is the simplest kit I've ever built and really worth doing to save money. The only tools it took were a #1 Phillips screwdriver and a pair of needle nose pliers. What took the longest was figuring out how to hook it up to the KX3/PX3 combination. Nothing in the KXPA100 assembly or Operating manuals that I found. Had to go to the PX3 manual to find the information. It might be a good idea for the manual writer/editor to include at least a reference to the PX3 manual for this configuration. If you don't have a PX3, instructions for hooking everything together in the KXPA100 book is pretty clear. I heartily recommend the optional cable kit and it really simplifies things and you don't have to spend a lot of time making something up to making it play nice. Once I had everything connected and the KXPA power output display calibration done, I hooked it to my Alpha Delta DX-LB 160/80/40 meter dipole to check the tuner's capability. It found a match on all bands 160-6 meters and no worse than a 1.2:1 SWR so it's certainly as good as the tuner in the K3. I have one of those MFJ 4230MV compact 30 amp switching power supplies and got everything cabled so it powers the KX3, a stereo audio speaker bar, PX3, KXAT100 and when needed a small clip-on LED logging light. By the way, this supply is very quiet RF wise and I can't find any noise from it on any ham band powering either the KX3 or K3 from it (I have the 45 amp MFJ 4245MV supply on the K3/P3 main operating desk and it's quiet too). I'm not currently planning on operating it mobile, but we're going to be visiting relatives in Texas, Louisiana and Florida next month so will have a collapsible vertical and the KX3 setup with me. It will be nice to have the 100 watt amp along to help overcome poor band conditions when the KX3's normal output isn't quite enough to maintain a QSO. I really like the way the firmware is set up in the KX3 and KXPA100 so that operation is as close to seamless as it can be. The auto bypass of the internal KX3 tuner when the amp is on is really nice and the auto-on of the amp when the KX3 is turned on is SUPER nice! The next project will be setting up as compact a carrying case as possible to safely transport the KX3, PX3, KXPA100 and all the accessories. Jim - W0EB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K3/0-Mini - Experiences?
I am fairly new to Elecraft and the K3 but I do have the K3/0 mini and the Remoterig twins for K3. I ordered and installed the WiFi board for the Remoterig. All works excellent. As long as the WiFi connection is OK, the K3/0 mini connects to the remote site and operates as if you are there. Many QSO's using the remote equipment and the other party cannot tell the difference. I am just using the standard MH2 mike. I do like the WiFi option as if allows me to establish stored WiFi connects that are remembered when I return so I simply set up the K3/0 mini and remote rig, turn it on and with a minute or so, it is ready to operate. Latency is small and not really noticeable so no issues there. You can use the K3/0 mini within your network but you may need a different destination IP than if you are outside the network. I have operated both ways. I have not played with the codecs yet. My audio reports are good. I do have a PC at the remote site and I connect to it with Team Viewer which allows me to operate and monitor the KAT500 and KPA500 via my laptop. I use the Elecraft beta control software for this. Home QTH is Calgary, Alberta. My K3 is British Columbia (VE7). I have operated from Phoenix, Fort Lauderdale and Calgary on a fairly regular basis. And, at the K3 site, take the K3/0 mini onto the deck outside and operate there when the weather is nice. Just a few comments. Randy VE6RMB - I'm in the midst of a terrible urge to spend some $$'s and the K3/0'-Mini's siren call is hard to resist. I've done a bit of reading on the Remoterig products and there is scare info on the K3/0 mini. I'd love to hear any testimonials, rig setups, real-world latency commentary, or even how you manage the firmware. Anyone play with the codecs? Thoughts on the different audio quality? My current though is using the K3/0-Mini on the same local network and I do some occasional work travel, might be nice to take it with me. Comments encouraged!!! 73 de K8OI __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Running the KX3 and KXPA100 Off Battery
Yep, which is one of a nearly countable infinity of reasons for not buying Li batteries from that big country a few thousand miles west of us. I seem to remember there is a limit on the amount of lithium you can take on. My pack says Approved by TSA for carry-on baggage. Contains less than 8 grams of lithium equivalent per pack. My little Li-poly has no statement like that on the label. 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.org On 5/26/2015 1:27 PM, Jim Brown wrote: Not quite, Fred. A sample of a Li-ion pack must be tested in a certified lab before it can go on aircraft. See the right sidebar here. http://www.batteryspace.com/ Some of their products are UN 38.3 certified, but many are not. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3/0-Mini - Experiences?
Hi! I have used the K3 mini extensively over the year. Both over a ADSL line and 4G. . Latency is dependent on the internet access - on ADLS it is 10 ms on 4G 30-40 ms.The K3 mini is so well established and works so well with the K3 and the RRC 1258 units so it is just for you to go and buy it. There is no big difference with different codecs. I use the next lowest quality level and when running dual mode it consumes about 400 kbps. Going for better audio quality I could not hear the difference to be honest. I have worked over 700 QSO:s over a year and all major Dx-peditions on almost all bands which proves the quality of the system. My system can be seen on qrz.com. I control ACOM2000A:s and OM 2500A:s with rotor controls from Green Heron. Works UFB. Join the satisfied Electraft K3 remote club. You wont be disappointed. -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-0-Mini-Experiences-tp7603508p7603511.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] K3/0-Mini - Experiences?
I used mine to remote my radio all of about two feet. It was nice having a smaller control head on my computer desk. I bought it thinking I could use it to work Kansas while I was on vacation in Japan - and then I never used it for that. Kansas is the only state I don't have on CW. I have to get it set up again and get it working through my firewall. It was definitely a fun thing to play with. On Tue, 26 May 2015, jlbates4 wrote: I'm in the midst of a terrible urge to spend some $$'s and the K3/0'-Mini's siren call is hard to resist. I've done a bit of reading on the RemoteRig products and there is scare info on the K3/0 mini. I'd love to hear any testimonials, rig setups, real-world latency commentary, or even how you manage the firmware. Anyone play with the codecs? Thoughts on the different audio quality? My current though is using the K3/0-Mini on the same local network and I do some occasional work travel, might be nice to take it with me. Comments encouraged!!! 73 de K8OI - K8OI mailto:jlbat...@gmail.com (804) 592-1068 -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-0-Mini-Experiences-tp7603508.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to ht...@twofifty.com -- Hisashi T Fujinaka - ht...@twofifty.com BSEE + BSChem + BAEnglish + MSCS + $2.50 = coffee __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3/0-Mini - Experiences?
Have you thought of an intervention? I have had MANY, or I would be penniless now, living out of a Ford Pinto Jim W6AIM -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of jlbates4 Sent: Tuesday, May 26, 2015 5:40 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3/0-Mini - Experiences? I'm in the midst of a terrible urge to spend some $$'s and the K3/0'-Mini's siren call is hard to resist. I've done a bit of reading on the RemoteRig products and there is scare info on the K3/0 mini. I'd love to hear any testimonials, rig setups, real-world latency commentary, or even how you manage the firmware. Anyone play with the codecs? Thoughts on the different audio quality? My current though is using the K3/0-Mini on the same local network and I do some occasional work travel, might be nice to take it with me. Comments encouraged!!! 73 de K8OI - K8OI mailto:jlbat...@gmail.com (804) 592-1068 -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-0-Mini-Experiences-tp7603508.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 jbol...@outlook.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Looking for Field Day Site, Columbia SC
Thanks, Larry. Some of these are new since I looked Sunday. At that time, the closest site to Lexington was in Camden. A couple of the sites showing now should work. I'll pass the info along. 73 de, --Ian Ian Kahn, KM4IK Roswell, GA EM74ua km4ik@gmail.com 10-10 #74624, North Georgia Chapter #2038 PODXS 070 #1962 K3# 281, P3 #688, KAT500 #860, KPA500 #1468 -Original Message- From: Larry Gauthier (K8UT) [mailto:k...@charter.net] Sent: Tuesday, May 26, 2015 11:13 AM To: Ian - Ham Subject: Re: [Elecraft] OT: Looking for Field Day Site, Columbia SC The ARRL Field Day locator map shows 4 FD sites in the general vicinity of Columbia: http://www.arrl.org/field-day-locator -larry (K8UT) -Original Message- From: Ian - Ham Sent: Tuesday, May 26, 2015 10:47 AM To: 'Elecraft Reflector' ; elecraft...@yahoogroups.com ; ft...@yahoogroups.com ; ft-...@yahoogroups.com ; ft-8...@yahoogroups.com ; se...@contesting.com Subject: [Elecraft] OT: Looking for Field Day Site, Columbia SC All, I have an acquaintance in the Columbia, SC, area, who is interested in getting into amateur radio. I suggested that Field Day would be a great place for him to really get a good look at today's amateur radio. When I checked the ARRL Field Day Locator, there are no sites listed yet for Columbia. Does anyone on list know of any Field Day activities in Columbia? He lives in the Lexington/West Columbia/South Congaree areas, but I'll happily provide him info on any Field Day site anywhere in Metro Columbia. Thanks for your help. 73 de, --Ian Ian Kahn, KM4IK Roswell, GA EM74ua km4ik@gmail.com mailto:km4ik@gmail.com 10-10 #74624, North Georgia Chapter #2038 PODXS 070 #1962 K3# 281, P3 #688, KAT500 #860, KPA500 #1468 --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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 k...@charter.net --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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] Running the KX3 and KXPA100 Off Battery (Phil Hystad)
Phil, Operating portable with a KX-3 and KXPA-100 running 50W I typically observe 6-8 hours of useful life per charge using this jumpstarter battery: http://www.amazon.com/gp/product/B00KBINF7G/ref=oh_aui_detailpage_o05_s01?ie=UTF8psc=1 They advertise that this is 18AH, but they do not advertise the low-voltage point of their measurement, so take that for what it is worth when you make your comparison. -DwightKF5WOE __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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, diversity and noise reduction
This is normally done ahead of the aerial input and will work with any receiver that supports such an input. Effectively what you are doing is creating a null in the antenna pattern in the direction of the source. It needs an effective point source to work well. If the signal is getting out through the mains lead, it may be more difficult. http://www.g8jnj.net/rfnoisecancellation.htm http://www.eham.net/reviews/detail/1138 http://www.eham.net/reviews/detail/1205 Incidentally, the first article claims a 30dB, rather than 20dB null. -- David Woolley Owner K2 06123 On 26/05/15 02:00, Tony McRae wrote: I have been watching some youtube clips showing how by adjusting the phase and amplitude of two received signals on a diversity receiver local noise can be reduced by more than 20db. This would be particularly useful to me as I have the dirtiest plasma TV on one side of me and a gaggle of cheap ADSL routers on the other. When pointed at them with my yagi the noise floor on 20-15m is over S7. The equipment used in the clip was the ANAN 100D SDR. Is anyone aware if this technique is possible using the K3 dual receivers? I have not found any place in the manual where it is possible to alter the phase of the secondary or primary signals. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [KX3] Can you switch between two configuration setting?
Gary: You might be able to set up a couple of command macros to set the relevant settings, this is exactly the sort of thing they were created to address, See KX3 Utility Help for the Command Tester and the K3/KX3 Programming ref on our manual page. But Config restore is pretty much all the micro controller's EEPROM, and doesn't have room for several copies, 73 de Dick, K6KR Sent from my iPhone On May 26, 2015, at 11:55, Gary Hawkins g...@hawkins-zhu.com wrote: I've started using my KX3 for JT65-HF, in addition to portable SSB SOTA operation. Obviously the radio is configured differently for both modes (switch on freq, mode, pre-amp setting, power and a number of menu based settings like Mic Bias, Mic Btn, AFX MD). snip Is there a way to set up the KX3 so I can just recall one of two configuration settings from the front panel without use of KX3 utility to quickly switch between the correct settings for these two operating modes? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] K2/100 twins configuration
Matt, That is correct. In the base K2, there will be no connection to P3 (the AUX 12V header), so the base K2 will not receive any power from the KPA100. The base K2 must be powered using the 2.1mm coaxial power connector. 73, Don W3FPR On 5/25/2015 4:55 PM, Matt Maguire wrote: There is a cable from KPA100 called KPA100-J4 that normally connects to the K2's P3 connector halfway along the right edge of the K2's RF board (when looking from the front of the radio. In a twins configuration, my guess is that this cable would not be connected, in which case you would need to power the K2 via the 2.1mm coaxial power socket on the back of the K2. Maybe someone with a twins setup can comment on this. 73, Matt VK2RQ _ From: Brian Denley b.den...@comcast.net Sent: mardo, majo 26, 2015 4:15 atm Subject: [Elecraft] K2/100 twins configuration To: Elecraft Reflector elecraft@mailman.qth.net, d...@w3fpr.com How does the K2 get it's power when only the high current supply is connected? I ask because sometimes my K2 doesn't - unless I connect a supply to the K2 directly. Is it through the KIO2? I also notice that when the power is lower the 11 watts, the SWR lights on my KAT100 do not light - but they do light when the power is 11 watts or higher. In both cases I can hear the KAT109 relays cranking away. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] KAT500
On 5/26/2015 5:50 AM, Larry Snyder wrote: I have a KAT500 with a vertical on ANT 1 and a Hex on ANT 3. I go to 20 meters with Auto flashing an put the radio in AM and the KAT500 tunes and finds a good SWR - all is fine. Then I play around with other frequencies and then come back and for some reason the KAT500 appears to not remember the tuning parameters and then retunes again for the same frequency on the same antenna. Why is this?? This happens frequently (i.e.: not remembering the settings and going into retune). If the MAN or AUTO LED is flashing, the KAT500 will tune as soon as enough RF is applied [~20 W]. Not sure I follow your explanation but ... I run my KAT500 in MAN all the time and it never forgets. I originally taught it by stepping through the segments of the bands and getting a match. I occasionally need to retune [like when it's been raining, which doesn't happen much out here in California these days], but basically it always knows. Not sure how AM got into this ... if I want the KAT to retune, I tap the KAT TUNE button, the MAN LED flashes and I hold XMIT on the K3. The K3 goes to tune power, the KAT tunes, and when it's done, I tap XMIT. Also, the SWR meter on the K3 is always blank (i.e.: no bars) while on the K3 and KPA500 I see the SWR at 1.5?? I don't follow that. The KAT500 SWR LED's display the SWR as seen by the KPA500 [after matching] as does the KPA500 too. It's the SWR on the jumper cable from the KPA output to the KAT input. The K3 displays the SWR looking into the KPA500, an impedance that should be essentially 50+j0 ohms for a 1:1 SWR. I don't see any SWR bars on my K3 either. 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] OT: Looking for Field Day Site, Columbia SC
On Tue,5/26/2015 7:47 AM, Ian - Ham wrote: Does anyone on list know of any Field Day activities in Columbia? How about looking for ham clubs in his area? 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] OT: Looking for Field Day Site, Columbia SC
Ian, One potential site may be the Congaree National Park. It is just south of Columbia. They do have a camping site location, there are rest rooms and plenty of parking for cars and trucks. I just did a drive-by and short visit last week on the way to a job in Augusta. There is no admittance fee to enter the park. The negatives are that it is in a low area along the Congaree River and the mosquito factor may be high in June. Not sure what their restrictions may be on radio operations. 73, Henry - K4TMC Raleigh, NC On Tue, May 26, 2015 at 10:47 AM, Ian - Ham km4ik@gmail.com wrote: All, I have an acquaintance in the Columbia, SC, area, who is interested in getting into amateur radio. I suggested that Field Day would be a great place for him to really get a good look at today's amateur radio. When I checked the ARRL Field Day Locator, there are no sites listed yet for Columbia. Does anyone on list know of any Field Day activities in Columbia? He lives in the Lexington/West Columbia/South Congaree areas, but I'll happily provide him info on any Field Day site anywhere in Metro Columbia. Thanks for your help. 73 de, --Ian Ian Kahn, KM4IK Roswell, GA EM74ua km4ik@gmail.com mailto:km4ik@gmail.com 10-10 #74624, North Georgia Chapter #2038 PODXS 070 #1962 K3# 281, P3 #688, KAT500 #860, KPA500 #1468 --- This email has been checked for viruses by Avast antivirus software. http://www.avast.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 kilo4...@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
[Elecraft] K3S/0 and Auto Turn on KPA500 from K3
Two questions - When can we expect to see the K3S/0-MINI-F remote head for remote control?? And I have a K3/P3/KAT500 and KPA500. The P3/KAT500 are connected to the 12V from the back of the K3 but is there an option or way to turn on the KPA500 when the K3 is turned on?? 73s Larry HK2LS -- Larry Snyder, RN.ORG Thousands of Nurses Depend on www.RN.org http://www.RN.org for their Nursing CEUs Daily! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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] P3 Noise
Yes, mine does it as well. I was using an Icom IC-91A HT on 135Mhz AM (with rubber duck antenna) and as I moved the HT away from the P3, the noise diminished into the normal noise level at a distance of about 2 feet. Seems to be strongest directly in front of the display. Even to the sides of the P3, the noise is barely detectable. Didn’t determine the bandwidth of the noise, but it seems to be fairly broad, however it doesn’t seem to be detectable with any other of my station gear. 73, Charles, K4ZRJ On May 26, 2015, at 8:54, Mike Greenway k...@bellsouth.net wrote: I was doing some power line noise tracking with my AM VHF radio and brought it into the shack and laid it on the desk with no antenna and started receiving a loud buzz from it. The tracker radio was tuned in the 135 Mhz area. I moved it around to all the suspects like computer monitors, TV, computer etc but it turned out the noise was coming from the P3. I took all the cables off the P3 and used a battery to power it and the noise was still there very loud. I am always working to keep the RF noise low from all the items in the shack so not sure what to do about this one. The This P3 was factory assembled. Has anyone else seen this problem? 73 Mike K4PI __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto: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 k4...@icloud.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 from May 24, 2015
It was rough going with poor propagation to most areas, but we did have 32 participants. Here is the list of stations: CALLNAMEQTH RIG NC0JW Jim CO KX3 1356 W4PFM PaulVA K3 1673 AB7CE Roy MT K2 40 QRP WB5JJA Ray OK K3 7877 K4GCJ Jerry NC K3 1597 WB9JNZ/mEricWI IC7000 N1LQDaveMA K3 371 W6NIA/m MattAZ KX3 6 KX6FJohnTN K3 7023 KC0XT David CA KX3 6980 K5ZCJ Larry OK K3 6592 W0CZKen ND KX3 4275 K5RHD Randy NM K3 6642 KF5IMA Bruce MS K2 3575 W7HDRon AZ KX3 6966 QRP K6WDE DaveCA KX3 4599QRP KF7JZH Ron ID KX3 2262 QRP KE7FSD Al AZ K3 8532 N6JW/m JohnCA KX3 K7BIE Jim AZ K3 7992 K7QHD KurtAZ K2 1538 K8NUCarlOH K3 7976 AD5HS Scott MS K3 5634 K4BKM Bryan NC K3 8893 KE7HGE Ken WA KX3 4540 QRP WV5IDwayne TX K3 5287 W0SGM Scott IA K3 8898 K6SAB Steve CA K3 7497 K6VEO JohnCA K3 8447 W4LDD Larry NC KX3 7664 K7JEO Jim CO KX3 4722 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] Running the KX3 and KXPA100 Off Battery
I don’t have a KXPA100 yet to go with my KX3 but when I get one (soon) it will be used almost entirely in portable operation off batteries — in particular: A123 Lithium battery packs. Currently have two 2.5 Amp-Hour packs and will be buying at least one 7.5 Amp-Hour pack (maybe two). Although many times I will be able to recharge my battery packs in the field (maybe not always conveniently) I would like to know about how much time (in real operating practice) I would expect from, let’s say 5 amp-hours of available charge. I could do computations and estimate duty cycle but I would also like to have real-world experience if someone has done something similar. My operating configuration would be: CW only and operating with enough power out to make good contacts (maybe only 50 watts or so). Currently, I have been limited to QRP to 10 watts on my KX3 and a number of times I had wanted more power — thus my motivation for using this amplifier and battery power. Thanks for any help you can provide — actual field experience preferred. 73, phil, K7PEH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
