Re: [Elecraft] K3 PSK-D Split Operation
The only way to split on PSK-31 is to use XIT. Just go up the necessary amount and transmit. Works fine. 73 Bill, K4CIA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 PSK-D Split Operation
*Bill, By all means educate me please. Why would split be used on a narrow bandwidth signal such as PSK31? Would you not be just consuming twice the amount of bandwidth as needed? I have casually operated PSK31 and I have not seen the band so crowded that operating split would be needed. Curious Gary * On 6 January 2012 19:26, Bill McDowell k4...@earthlink.net wrote: The only way to split on PSK-31 is to use XIT. Just go up the necessary amount and transmit. Works fine. 73 Bill, K4CIA __ 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 -- Gary VK4FD - Motorhome Mobile Elecraft Equipment K3 #679, KPA-500 #018 Living the dream!!! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K24U Software
Dan, I can reproduce the error messages stated by simply configuring K2 PORT=OFF. So if your K2 serial Port is set to ON, make sure the K2 to Computer Cable Assembly is correct (e.g. as in KIO2 Manual, Figure 7). CAUTION: Do not use a pre-assembled cable of any kind (printer cable, etc.) between the KIO2 and a computer. 73, Heinz HB9BCB On Jan 05, 2012; 6:58pm Dan Mees wrote: ... When I click Connect... I get a window that sez K2 communication Link Has Been Reset. I click OK but get no joy. ... -- View this message in context: http://elecraft.365791.n2.nabble.com/K24U-Software-tp7155405p7157794.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 PSK-D Split Operation
Split operation is dictated by the desires of the DX station. If he is quite rare, as in the case of VK0TH on Macquarie, he cannot hear the multitude of stations calling simplex and those calling simplex cannot hear his reply. So split is necessary to complete the contact. Exactly like cw, ssb or rtty. My observations on this subject are based on using the native PSK capability in the K3, and not from some other software package. Split operation may be available from them as Don suggested. Bill, K4CIA *Bill, By all means educate me please. Why would split be used on a narrow bandwidth signal such as PSK31? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] what microphones work best with K3?
I also have the CM500 but my main desk mic is an Icom SM-8. I use no equalization with the SM-8 and reports I get are don't touch a thing it sounds great. When I switch to the CM500 (no equalization), they always tell the SM-8 sounds much better. So 2 questions: 1) I know every voice is different but can any of u share the equalization settings you have set for the CM500. I'd like to at least get a starting point. 2) If I continue to use the SM-8, am I going to have to reset the equalization to flat after ever time I've used the CM500? Seems cumbersome to have to switch back and forth between headset and desk mic Thanks for the advice and help! Steve -- View this message in context: http://elecraft.365791.n2.nabble.com/what-microphones-work-best-with-K3-tp7154516p7158269.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 Trade my 1.8k for your 2.1k filter
Straight trade...please reply off-list only. 73, Bill W4ZV __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 KXUSB vs KXSER interface
All the programming/CW/PTT cable discussions prompted me to pass along this tip someone else gave me: On the recommendation of someone I met in Dayton this year, I've made several radio programming/CAT/CW/PTT cables using these devices: http://www.ftdichip.com/Products/Cables/USBRS232.htm They terminate to bare wires so you can put whatever connector you need on the end. It's also easy to slip a copper braid over the wire for shielding if that is required. I've had no issues using them on Windows or Linux. Mouser sells them: http://www.mouser.com/Search/m_ProductDetail.aspx?FTDI/USB-RS232-WE-1800-BT_50/qs=D1/PMqvA100CRKe9cg4TXA== This model is RS-232, but they have them with TTL an RS-422 as well if you have a requirement for those interfaces. I'm using them for radio CAT/PTT/CW keying with my K2 and IC-706. The '706 CAT cable is connected homebrewed CIV circuit covered with black heat shrink tubing. The PTT/CW keying cables are connected to homebrew single transistor keying circuits specific for the radio it's intended for, also covered with heat shrink tubing. It makes a nice, compact set of cables. I use a separate cable for programming/CAT and keying/PTT. Off topic a bit, but I also use these cables for radio programming and low speed data with my D-STAR radios. Mike Heitmann, N0SO __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] what microphones work best with K3?
Just wanted to report that what I received yesterday as my great deal from a company in northern PA was not the CM500 as advertised on amazon but HPE100M. I am thoroughly pissed and they were advertised as new and were in a crumbled box. Caveat emptor should have been alerted when the price was so low. Keith AG6AZ Sent from my iPhone please excuse typos On Jan 6, 2012, at 4:36 AM, evetsmd evet...@gmail.com wrote: I also have the CM500 but my main desk mic is an Icom SM-8. I use no equalization with the SM-8 and reports I get are don't touch a thing it sounds great. When I switch to the CM500 (no equalization), they always tell the SM-8 sounds much better. So 2 questions: 1) I know every voice is different but can any of u share the equalization settings you have set for the CM500. I'd like to at least get a starting point. 2) If I continue to use the SM-8, am I going to have to reset the equalization to flat after ever time I've used the CM500? Seems cumbersome to have to switch back and forth between headset and desk mic Thanks for the advice and help! Steve -- View this message in context: http://elecraft.365791.n2.nabble.com/what-microphones-work-best-with-K3-tp7154516p7158269.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 PSK-D Split Operation
On Fri, Jan 6, 2012 at 3:32 AM, Gary Gregory garyvk...@gmail.com wrote: Why would split be used on a narrow bandwidth signal such as PSK31?... Same reason it's used on a narrow bandwidth signal such as CW: to spread the pileup. And BTW, although the DX that Bud was asking about was listening up only 400 hz, the guys in the Solomon Is and the guy on Trinidade/Martim Vaz were listening up 2 - 5 khz. The simplest way to get the K3 to do that split is by using USB instead of Data mode. Tony KT0NY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Horizontal loop question
I have been quite pleased with this delta loop since I put it up about six weeks ago. The pattern does seem to be omni-directional and I notice that the noise level appears to be at least fairly low. I've worked several stations (North Cook Islands, Bonnaire Ireland) that were just above the noise level that many other stations didn't seem to hear. I originally put up a 88' doublet but, upon presenting my new creation to the XYL, she commented, Is there any way to move that ugly black thing? referring to the center insulator which was directly in our view of the foothills behind our house. The aggravating thing about the comment was that she was entirely right. I sat up half the night trying to think of a way to re-orient the doublet before it finally crossed my mind to take the surplus wire I had sitting around and attach it to both ends of the doublet. This created the delta loop and allowed me to get the feed-point out of our line-of-sight. That was a serendipitous turn of events for me because I had never considered a loop before. On Thu, Jan 5, 2012 at 6:21 PM, AB5N 7000...@gmail.com wrote: I've always been a fan of the horizontal loop. The Delta config works well. Constructive and destructive effects on the radiation of the antenna occur depending on the frequency, size of the loop and height above ground. A 140 ft loop at 45 feet works well on 40 meters and up. You get virtually omni-directional reception and a decently low angle of radiation. It's an over-all winner design. Only thing I like better out of wire is a Carolina Windom. -- View this message in context: http://elecraft.365791.n2.nabble.com/Horizontal-loop-question-tp7156283p7156881.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 -- Rick McClelland, AA5S Fort Collins, CO __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] OT: Quiet 12V-to-5V converter
Dear Elecraft list members, The recent thread on noisy switching power supplies leads me to a related question. My son n8fyk, who teaches radio astronomy, has set up a project with his students. They are using a 15m direct-conversion Radio Jove receiver in the field to monitor radio emissions from Jupiter, the sun, and the galaxy. The receiver operates from 12V, which is readily supplied by a portable utility 12V battery pack. Their problem is powering their data recorder, which needs about 5V at 0.7A. The data recorder is designed to operate from three internal AA alkaline cells, but these give a limited run time. My son would like to be able to leave the receiver and recorder for unattended operation for several days at a time. One solution would be to use a 12V-to-5V power converter between the 12V battery and the data recorder. For long battery life, it would be nice to have the efficiency of a switching converter. Such a converter would have to be RF-quiet, so as not to interfere with their weak-signal reception. I will be interested to hear what list members recommend. Thank you and 73, John, no8v __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] OT: Quiet 12V-to-5V converter
Hi John, What about using a 7805 regulator to drop the 12V to 5V? I'm sure that you could do the job with one of those and maybe a coupla small caps for bypassing. Heatsinking, if any would need to be minimal for the regulator. And no noise issues, if the bypassing is done right. HTH 73 de Jeff Cochrane - VK4BOF East Innisfail QLD, Australia K3 #4257, P3 #1629, KPA-500 #161 - Original Message - From: John Gibson gib...@alma.edu To: elecraft@mailman.qth.net Sent: Saturday, January 07, 2012 1:10 AM Subject: [Elecraft] OT: Quiet 12V-to-5V converter Dear Elecraft list members, The recent thread on noisy switching power supplies leads me to a related question. My son n8fyk, who teaches radio astronomy, has set up a project with his students. They are using a 15m direct-conversion Radio Jove receiver in the field to monitor radio emissions from Jupiter, the sun, and the galaxy. The receiver operates from 12V, which is readily supplied by a portable utility 12V battery pack. Their problem is powering their data recorder, which needs about 5V at 0.7A. The data recorder is designed to operate from three internal AA alkaline cells, but these give a limited run time. My son would like to be able to leave the receiver and recorder for unattended operation for several days at a time. One solution would be to use a 12V-to-5V power converter between the 12V battery and the data recorder. For long battery life, it would be nice to have the efficiency of a switching converter. Such a converter would have to be RF-quiet, so as not to interfere with their weak-signal reception. I will be interested to hear what list members recommend. Thank you and 73, John, no8v __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3, I broke it. Headed for the schematics
On 12-01-03 12:06 PM, Ron D'Eau Claire wrote: A common mistake when installing filters is to count left to right, looking at the filter locations on the pc board, instead of right to left. Counting in either direction to find where to install a filter sounds like an approach that is very prone to errors. I don't have a K3 so I can't check its innards, but wouldn't it make more sense to use some sort of (silk screen?) labelling where the filters are placed with labels like Filter 1, Filter 2, or just F1, F2? The information for installing a filter can then use the labels when indicating where it needs to be (or can be) placed. -- Cheers! Kevin. http://www.ve3syb.ca/ |Nerds make the shiny things that distract Owner of Elecraft K2 #2172 | the mouth-breathers, and that's why we're | powerful! #include disclaimer/favourite | --Chris Hardwick __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3, I broke it. Headed for the schematics
The locations are labelled. Look at page 5, figure 1 of the K3 assembly manual. The filter locations are printed on the top of the white filter outlines. 73, Dennis NJ6G On 1/6/2012 8:13 AM, Kevin Cozens wrote: Counting in either direction to find where to install a filter sounds like an approach that is very prone to errors. I don't have a K3 so I can't check its innards, but wouldn't it make more sense to use some sort of (silk screen?) labelling where the filters are placed with labels like Filter 1, Filter 2, or just F1, F2? The information for installing a filter can then use the labels when indicating where it needs to be (or can be) placed. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] OT: Quiet 12V-to-5V converter
There are quite a few simple switching regulator chips for 12V -- 5V, requiring only a handful of parts to make a complete switching converter. For example, National Semiconductor (now TI after the recent purchase) LM2591HVT-5.0/NOPB. Stocked by Mouser and DigiKey at about $6. This series is available in a through hole 4-pin TO-220 style device so breadboarding up a one-off power supply isn't too difficult. With careful attention to detail, bypassing and shielding it should be possible to build a quiet 5V, 1A supply around these parts. It can be small enough to fit into a 2x2x1 Hammond die cast enclosure, and you can use feedthrough caps for input and output, along with some internal LC filtering. Still, 5V at 700 mA with a switching regulator and a 12V battery (assuming 100% efficiency which isn't possible of course) the setup will require 300mA from the battery. For 100 hours of operation, you're looking at a 30 Ah battery requirement. While a battery will output more Ah with a 100 hour discharge cycle, it's not that much more. A 35Ah sealed 12V gel-cel type lead acid battery will run you about $100. For serious long duration battery operation, I would look for a more thrifty data logger. Jack K8ZOA On 1/6/2012 10:10 AM, John Gibson wrote: Dear Elecraft list members, The recent thread on noisy switching power supplies leads me to a related question. My son n8fyk, who teaches radio astronomy, has set up a project with his students. They are using a 15m direct-conversion Radio Jove receiver in the field to monitor radio emissions from Jupiter, the sun, and the galaxy. The receiver operates from 12V, which is readily supplied by a portable utility 12V battery pack. Their problem is powering their data recorder, which needs about 5V at 0.7A. The data recorder is designed to operate from three internal AA alkaline cells, but these give a limited run time. My son would like to be able to leave the receiver and recorder for unattended operation for several days at a time. One solution would be to use a 12V-to-5V power converter between the 12V battery and the data recorder. For long battery life, it would be nice to have the efficiency of a switching converter. Such a converter would have to be RF-quiet, so as not to interfere with their weak-signal reception. I will be interested to hear what list members recommend. Thank you and 73, John, no8v __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Accessories for sale
All are spoken for - thanks all. -- View this message in context: http://elecraft.365791.n2.nabble.com/Accessories-for-sale-tp7157105p7159027.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 and KPA500 with W3YY for FSK RTTY
Folks, Has anyone cabled up and successfully implemented the W3YY R2 FSK/keyer box with a K-line [K3-P3-KPA500] and Writelog v11.01E? I suspect that the ACC splitter should be used so you can maintain control and sensing between the K3 and KPA500. I'm most interested in any details on the proper settings in the K3 along with notes on what may need to be set in Writelog. If WL is not in the mix, then send logging software settings notes from other logger and we'll try to correlate them to what we are using at W6YX. Replies off-list accepted, just watch out for my TMDA filter. -- 73 de N6DB aka Rebar mobile @ (925) 353-7952 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] what microphones work best with K3?
I can verify that despite his voice made for CW that N0NB sounds good on 1.947 most every night. I got the MH2 with my K3 and always got excellent reports with it. I now use a Radio Shack dynamic studio mic I bought for $15 NIB on Ebay and get good reports with it too. With the range the K3 equalizer has pretty much any mic that will interface with the rig should sound good with the correct equalization. -- View this message in context: http://elecraft.365791.n2.nabble.com/what-microphones-work-best-with-K3-tp7154516p7159130.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 Bluetooth Capable for Wireless Keyboard?
hi dan, Not at this time. We do not have Bluetooth inside the KX3. 73, Eric Eric --- www.elecraft.com On 1/5/2012 11:39 AM, Dan Boardman wrote: I think I read somewhere that the KX3 is/will be Bluetooth capable - will there be recognition/provision of/for a wireless mini keyboard or will there be some other way to plug a keyboard directly into the KX3? Dan - KI4YZE __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 PSK-D Split Operation
The original question was about PSK D but the answers didn't address that question. Assuming that Bud was really wanting to use PSK D with text decode on the K3 and direct CW to DATA then the K3 does indeed indicate SPL N/A. In that case XIT does offer a method by which to go split. If instead he was wishing to use a PC based PSK terminal then the correct mode would be DATA A. This does in fact allow split as does AFSK A and FSK D. This is all easily checked by switching DATA MD settings on the K3. If Bud has chosen PSK D in error wishing to use a PC based PSK terminal then the simple answer is to select data mode DATA A. This also has the advantage of flattening the EQ settings unlike USB which can have a very tailored EQ set-up to suit a voice/mic combo. When in PSK D mode, audio is still passed to the PC and signals are visible on the waterfall, this could possibly lead to confusion. Regards, Mike VP8NO __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] OT: Quiet 12V-to-5V converter
Why not just use a 6 volt motorcycle battery (two or three in parallel if necessary) with a series diode? The total weight isn't going to be any different no matter what you do ... one battery for everything or separate batteries for receiver and data logging. AH capacity is AH capacity. The efficiency would probably be above 85% if a diode rated for a couple of amps was used, assuming a Vf around 0.7 volts, and it would be tough to beat for quiet. Dave AB7E On 1/6/2012 9:34 AM, Jack Smith wrote: There are quite a few simple switching regulator chips for 12V -- 5V, requiring only a handful of parts to make a complete switching converter. For example, National Semiconductor (now TI after the recent purchase) LM2591HVT-5.0/NOPB. Stocked by Mouser and DigiKey at about $6. This series is available in a through hole 4-pin TO-220 style device so breadboarding up a one-off power supply isn't too difficult. With careful attention to detail, bypassing and shielding it should be possible to build a quiet 5V, 1A supply around these parts. It can be small enough to fit into a 2x2x1 Hammond die cast enclosure, and you can use feedthrough caps for input and output, along with some internal LC filtering. Still, 5V at 700 mA with a switching regulator and a 12V battery (assuming 100% efficiency which isn't possible of course) the setup will require 300mA from the battery. For 100 hours of operation, you're looking at a 30 Ah battery requirement. While a battery will output more Ah with a 100 hour discharge cycle, it's not that much more. A 35Ah sealed 12V gel-cel type lead acid battery will run you about $100. For serious long duration battery operation, I would look for a more thrifty data logger. Jack K8ZOA On 1/6/2012 10:10 AM, John Gibson wrote: Dear Elecraft list members, The recent thread on noisy switching power supplies leads me to a related question. My son n8fyk, who teaches radio astronomy, has set up a project with his students. They are using a 15m direct-conversion Radio Jove receiver in the field to monitor radio emissions from Jupiter, the sun, and the galaxy. The receiver operates from 12V, which is readily supplied by a portable utility 12V battery pack. Their problem is powering their data recorder, which needs about 5V at 0.7A. The data recorder is designed to operate from three internal AA alkaline cells, but these give a limited run time. My son would like to be able to leave the receiver and recorder for unattended operation for several days at a time. One solution would be to use a 12V-to-5V power converter between the 12V battery and the data recorder. For long battery life, it would be nice to have the efficiency of a switching converter. Such a converter would have to be RF-quiet, so as not to interfere with their weak-signal reception. I will be interested to hear what list members recommend. Thank you and 73, John, no8v __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] FS: K2 #5723
I purchased K2 #5723 as an unfinished kit. I completed the assembly, and added the following accessories: K160RX KAF2 KAT2 KDIMP KIO2 KNB2 KSB2 K6XX CW Indicator N0SS External T-R Relay Driver (keys external amplifier, plugged into 60m connector) Rework Eliminators their Internal Mic Adapter (both installed) W3FPR/N0SS Fixed Audio Output PCB (no components) Includes full documentation It is using V2.04P main micro-controller firmware, V1.09 I/O controller firmware. It puts out greater than 10w on all bands (min: 10.1w on 10 160m, max: 14w on 80m into 50 ohm dummy load). $800 - John, N0TA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KAT3 versus KAT500 ?
Assume someone orders a K3 kit after the KAT500 is available. Is there any disadvantage to using only the KAT500 as the tuner and not using the KAT3 at all? Consider the power levels of milliwatt QRP all the way to 500 watts. PEH's iPad __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3, I broke it. Headed for the schematics
Quite right, both of you, but in our western culture many people automatically count from left to right, especially when working in hurry, tired, etc. We've had several reports on this reflector of people discovering they did just that. 73, Ron AC7AC -Original Message- The locations are labelled. Look at page 5, figure 1 of the K3 assembly manual. The filter locations are printed on the top of the white filter outlines. 73, Dennis NJ6G On 1/6/2012 8:13 AM, Kevin Cozens wrote: Counting in either direction to find where to install a filter sounds like an approach that is very prone to errors. I don't have a K3 so I can't check its innards, but wouldn't it make more sense to use some sort of (silk screen?) labelling where the filters are placed with labels like Filter 1, Filter 2, or just F1, F2? The information for installing a filter can then use the labels when indicating where it needs to be (or can be) placed. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] what microphones work best with K3?
On 1/6/2012 4:35 AM, evetsmd wrote: I know every voice is different but can any of u share the equalization settings you have set for the CM500. I'd like to at least get a starting point. For most competitive audio for DXing and contesting -- Lowest two bands max cut, third band cut 6dB, then have someone listen with their IF set wide. The objective is to hear no low end in your voice, which wastes power and provides no speech intelligibility. Use additional cut in that third band if he does hear low end. 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
Re: [Elecraft] K3, I broke it. Headed for the schematics
Ron, Maybe the best answer to this problem is for the first step after removing the top cover is to turn the K3 with the back toward you - then the filters align left to right. The labels may be upside down, but the order would be from left to right. 73, Don W3FPR On 1/6/2012 1:23 PM, Ron D'Eau Claire wrote: Quite right, both of you, but in our western culture many people automatically count from left to right, especially when working in hurry, tired, etc. We've had several reports on this reflector of people discovering they did just that. 73, Ron AC7AC -Original Message- The locations are labelled. Look at page 5, figure 1 of the K3 assembly manual. The filter locations are printed on the top of the white filter outlines. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3, I broke it. Headed for the schematics
Anyone with any knowledge of high school math will see numbers on a number line increasing as you go left to right. I don't think that is cultural in the language of mathematics. As for putting filters in the wrong spot: RTFM. At some point it should be the builder's responsibility. I think Elecraft has done their part in this area. Gary W2CS -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft- boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Friday, January 06, 2012 1:44 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3, I broke it. Headed for the schematics Ron, Maybe the best answer to this problem is for the first step after removing the top cover is to turn the K3 with the back toward you - then the filters align left to right. The labels may be upside down, but the order would be from left to right. 73, Don W3FPR On 1/6/2012 1:23 PM, Ron D'Eau Claire wrote: Quite right, both of you, but in our western culture many people automatically count from left to right, especially when working in hurry, tired, etc. We've had several reports on this reflector of people discovering they did just that. 73, Ron AC7AC -Original Message- The locations are labelled. Look at page 5, figure 1 of the K3 assembly manual. The filter locations are printed on the top of the white filter outlines. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] OT: Quiet 12V-to-5V converter
While a 6V battery may work, I would be concerned with voltage regulation. If the data logger is a true 5V device, a simple series diode may not keep the supply within acceptable limits over the typical range of battery voltage from full charge to discharge. An analog LDO regulator would be a better choice than a diode. However, a 12V battery supply would, according to the original post, also allow the receiver to be powered from one source. Jack K8ZOA On 1/6/2012 12:49 PM, David Gilbert wrote: Why not just use a 6 volt motorcycle battery (two or three in parallel if necessary) with a series diode? The total weight isn't going to be any different no matter what you do ... one battery for everything or separate batteries for receiver and data logging. AH capacity is AH capacity. The efficiency would probably be above 85% if a diode rated for a couple of amps was used, assuming a Vf around 0.7 volts, and it would be tough to beat for quiet. Dave AB7E On 1/6/2012 9:34 AM, Jack Smith wrote: There are quite a few simple switching regulator chips for 12V -- 5V, requiring only a handful of parts to make a complete switching converter. For example, National Semiconductor (now TI after the recent purchase) LM2591HVT-5.0/NOPB. Stocked by Mouser and DigiKey at about $6. This series is available in a through hole 4-pin TO-220 style device so breadboarding up a one-off power supply isn't too difficult. With careful attention to detail, bypassing and shielding it should be possible to build a quiet 5V, 1A supply around these parts. It can be small enough to fit into a 2x2x1 Hammond die cast enclosure, and you can use feedthrough caps for input and output, along with some internal LC filtering. Still, 5V at 700 mA with a switching regulator and a 12V battery (assuming 100% efficiency which isn't possible of course) the setup will require 300mA from the battery. For 100 hours of operation, you're looking at a 30 Ah battery requirement. While a battery will output more Ah with a 100 hour discharge cycle, it's not that much more. A 35Ah sealed 12V gel-cel type lead acid battery will run you about $100. For serious long duration battery operation, I would look for a more thrifty data logger. Jack K8ZOA On 1/6/2012 10:10 AM, John Gibson wrote: Dear Elecraft list members, The recent thread on noisy switching power supplies leads me to a related question. My son n8fyk, who teaches radio astronomy, has set up a project with his students. They are using a 15m direct-conversion Radio Jove receiver in the field to monitor radio emissions from Jupiter, the sun, and the galaxy. The receiver operates from 12V, which is readily supplied by a portable utility 12V battery pack. Their problem is powering their data recorder, which needs about 5V at 0.7A. The data recorder is designed to operate from three internal AA alkaline cells, but these give a limited run time. My son would like to be able to leave the receiver and recorder for unattended operation for several days at a time. One solution would be to use a 12V-to-5V power converter between the 12V battery and the data recorder. For long battery life, it would be nice to have the efficiency of a switching converter. Such a converter would have to be RF-quiet, so as not to interfere with their weak-signal reception. I will be interested to hear what list members recommend. Thank you and 73, John, no8v __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Let me build a K2 for you.
I have built more than 320 K2's to date. Let me build one for you. You will have a new K2 with the options you want. My prices are reasonable. Please respond off of the reflector. 73 Alan W1HYV __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KX3 Options
*Does anyone know when the KX3 100W PA with the ATU integrated be released? Sorry if I missed any earlier announcement. 73 Gary * -- Gary VK4FD - Motorhome Mobile Elecraft Equipment K3 #679, KPA-500 #018 Living the dream!!! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Motorcycle Battery??
John/NO8V Mention Motorcycle and the price raises accordingly. However, the site below lists various non-motorcycle sealed batteries at (IMHO) a reasonable price.Don't know what A/h your looking for; those below are for 7 A/hr. 6v= http://www.atbatt.com/sealed-lead-acid-batteries/b/universal-power-group/m/d5734.asp 12v= http://www.atbatt.com/sealed-lead-acid-batteries/b/universal-power-group/m/45566.asp Good luck on your quest., Bill-w7kxb __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX3 Options
Can't put an exact date on it, but... later this year. 73, Wayne N6KR On Jan 6, 2012, at 12:29 PM, Gary Gregory wrote: *Does anyone know when the KX3 100W PA with the ATU integrated be released? Sorry if I missed any earlier announcement. 73 Gary * __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KX3 Options
*Thanks guys, guess I will wait till next year then. 73 Gary * -- Gary VK4FD - Motorhome Mobile Elecraft Equipment K3 #679, KPA-500 #018 Living the dream!!! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Yocto to Yotta meters
http://htwins.net/scale/index.html Find mil at the 25 um size range. (2.5 times 10 to the -5th meters) Zoom from the quantum foam to past the edge of the universe. I had never heard of yottameters before :) 73, Kevin. KD5ONS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3, I broke it. Headed for the schematics
Perhaps Wayne should have assigned NEGATIVE numbers to the filter locations then, HI! 73, Ron AC7AC -Original Message- Anyone with any knowledge of high school math will see numbers on a number line increasing as you go left to right. I don't think that is cultural in the language of mathematics. As for putting filters in the wrong spot: RTFM. At some point it should be the builder's responsibility. I think Elecraft has done their part in this area. Gary W2CS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3EXREF with HP Z3816A GPS Receiver
__ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 PSK-D Split Operation
Bud, I pursued this issue about a month ago and I called Elecraft. They acknowledged PSK D will not operate split. I was told to find a digital software program! It could be fixed but they were not interested was the impression I got. For me I like to use RTTY and PSK D in standalone mode (without a digital program running) usually chasing DX in pileups. I have a couple of messages in memory and it works FB for my needs. My issue was that RTTY will split in standalone mode but PSK D will not. Why? Why not be consistent? It seemed like a reasonable request to have Split operate the same for all K3 digital standalone modes. I was wrong. Fiddling around with RIT XIT works but it's not as convenient as Split. When DX says listening up, you xmit UP to play the game. 73, Ralph K1ZZI Date: Thu, 05 Jan 2012 18:28:25 -0500 From: Bud Governale, W3LL w...@arrl.net Subject: [Elecraft] To: elecraft@mailman.qth.net When in Data Mode PSK-D (31 bps) I get SPL N/A when trying to operate split. Both VFO's were on the same frequency but could not get VFO B to go up. What do I need to do to go into split operation in this mode? Today VK0TH was operating on 28,121 MHz and listening 400 Hz up. I just could not get into split mode. 73, Bud W3LL w...@arrl.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] OT: Quiet 12V-to-5V converter
Thanks to all who responded to my query. At this point I plan to follow Jack Smith's excellent recommendation to build a DC-to-DC converter based on the LM-2591 chip and do my best with appropriate filtering to keep RFI from getting out of the box. I appreciate having the excellent resources of the Elecraft reflector to draw upon for solving this type of problem. 73, John, no8v __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Yocto to Yotta meters
On 1/6/2012 1:06 PM, kevinr wrote: http://htwins.net/scale/index.html Find mil at the 25 um size range. (2.5 times 10 to the -5th meters) Zoom from the quantum foam to past the edge of the universe. It's an impressive representation for sure. The size of the observable universe today is given as roughly 14 billion light-years in the next to last image. The Big One was about 14 billion years ago, so it's an understandable error ... a photon from that moment would have been traveling for 14 billion years before it found us. There actually were no free photons right after the Big Bang, they appeared 300,000 or 400,000 years later, but close enough out of 14,000,000,000. However, in that time, the space between us and where that photon started has expanded about 3.3 times, so today the visible edge of the universe is about 47 billion light-years away, give or take a billion or so. Who knows how many new DXCC entities lie out there and only the the US National Budget uses numbers larger than these. I had never heard of yottameters before :) Me neither. 73, Fred K6DGW - Northern California Contest Club - CU in the 2012 Cal QSO Party 6-7 Oct 2012 - 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
Re: [Elecraft] OT: Quiet 12V-to-5V converter
Well, he said that the data recorder was designed for and currently uses three AA alkaline batteries. Those things have far from a flat discharge voltage curve so I assumed that the data recorder had some sort of internal regulation. I also assumed he would have to add another battery anyway since not many utility packs have anything close to the capacity it would require to deliver 0.7 amps for several days. Five days times 24 hours per day times 0.7 amps is about 80AH, and you still have to derate that for the practical discharge threshold of a normal battery. We're talking well over 100 AH, and I'll bet that the utility power pack they're using has less than a tenth of that. Maybe it is important to run everything off one battery, but if so I'll bet it won't be the one they already have. Dave AB7E On 1/6/2012 1:07 PM, Jack Smith wrote: While a 6V battery may work, I would be concerned with voltage regulation. If the data logger is a true 5V device, a simple series diode may not keep the supply within acceptable limits over the typical range of battery voltage from full charge to discharge. An analog LDO regulator would be a better choice than a diode. However, a 12V battery supply would, according to the original post, also allow the receiver to be powered from one source. Jack K8ZOA On 1/6/2012 12:49 PM, David Gilbert wrote: Why not just use a 6 volt motorcycle battery (two or three in parallel if necessary) with a series diode? The total weight isn't going to be any different no matter what you do ... one battery for everything or separate batteries for receiver and data logging. AH capacity is AH capacity. The efficiency would probably be above 85% if a diode rated for a couple of amps was used, assuming a Vf around 0.7 volts, and it would be tough to beat for quiet. Dave AB7E On 1/6/2012 9:34 AM, Jack Smith wrote: There are quite a few simple switching regulator chips for 12V --5V, requiring only a handful of parts to make a complete switching converter. For example, National Semiconductor (now TI after the recent purchase) LM2591HVT-5.0/NOPB. Stocked by Mouser and DigiKey at about $6. This series is available in a through hole 4-pin TO-220 style device so breadboarding up a one-off power supply isn't too difficult. With careful attention to detail, bypassing and shielding it should be possible to build a quiet 5V, 1A supply around these parts. It can be small enough to fit into a 2x2x1 Hammond die cast enclosure, and you can use feedthrough caps for input and output, along with some internal LC filtering. Still, 5V at 700 mA with a switching regulator and a 12V battery (assuming 100% efficiency which isn't possible of course) the setup will require 300mA from the battery. For 100 hours of operation, you're looking at a 30 Ah battery requirement. While a battery will output more Ah with a 100 hour discharge cycle, it's not that much more. A 35Ah sealed 12V gel-cel type lead acid battery will run you about $100. For serious long duration battery operation, I would look for a more thrifty data logger. Jack K8ZOA On 1/6/2012 10:10 AM, John Gibson wrote: Dear Elecraft list members, The recent thread on noisy switching power supplies leads me to a related question. My son n8fyk, who teaches radio astronomy, has set up a project with his students. They are using a 15m direct-conversion Radio Jove receiver in the field to monitor radio emissions from Jupiter, the sun, and the galaxy. The receiver operates from 12V, which is readily supplied by a portable utility 12V battery pack. Their problem is powering their data recorder, which needs about 5V at 0.7A. The data recorder is designed to operate from three internal AA alkaline cells, but these give a limited run time. My son would like to be able to leave the receiver and recorder for unattended operation for several days at a time. One solution would be to use a 12V-to-5V power converter between the 12V battery and the data recorder. For long battery life, it would be nice to have the efficiency of a switching converter. Such a converter would have to be RF-quiet, so as not to interfere with their weak-signal reception. I will be interested to hear what list members recommend. Thank you and 73, John, no8v __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list:
[Elecraft] K3EXREF with HP 3816A GPS Receiver
The 3816 has been sold. Thanks. Bill, WA4KBD If anyone on the lis is interested in purchasing my HP Z3816A GPS receiver for use with K3EXREF and/or as a lab standard, I have all the details posted on my website at: __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] OT: Quiet 12V-to-5V converter
Hi John: OK let's say your requirement is for a low noise, high efficiency converter delivering 4.5 to 5V at up to 1 amp. There are hundreds of series linear regulators that will do that job but the will dissipate more than 3 watts as heat and that will require a small heatsink. For greater efficiency you will want a switching regulator. Fortunately there are also hundreds of switching regulators available too. Many of the manufactures have online software for designing the circuit. What you want is a low RFI design. There are various categories of RFI. Your receiver should already be protected against conducted RFI so you should be protecting your receiver against radiated RFI. Radiated RFI comes from either magnet or electric fields. Of the two types, electric fields are much easier to shield or reduce. Again, this translates to a switching regulator that stores energy in capacitors rather than inductors. For maximum efficiency the circuit should use two FETs (one for switching and one for commutating). Searching the manufacture's web pages for Low RFI switching regulators will usually find what you need. Then when you have a working circuit, enclose it in a metal box to provide an effective Faraday shield. The same manufacturer pages will also provide you with app notes that will also provide a typical design. Finally keep your regulator as far away as possible from your receiver. DO NOT put them in the same box. Hope this helps. 73 Fred, AE6QL -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of John Gibson Sent: Friday, January 06, 2012 7:11 AM To: elecraft@mailman.qth.net Subject: [Elecraft] OT: Quiet 12V-to-5V converter Dear Elecraft list members, The recent thread on noisy switching power supplies leads me to a related question. My son n8fyk, who teaches radio astronomy, has set up a project with his students. They are using a 15m direct-conversion Radio Jove receiver in the field to monitor radio emissions from Jupiter, the sun, and the galaxy. The receiver operates from 12V, which is readily supplied by a portable utility 12V battery pack. Their problem is powering their data recorder, which needs about 5V at 0.7A. The data recorder is designed to operate from three internal AA alkaline cells, but these give a limited run time. My son would like to be able to leave the receiver and recorder for unattended operation for several days at a time. One solution would be to use a 12V-to-5V power converter between the 12V battery and the data recorder. For long battery life, it would be nice to have the efficiency of a switching converter. Such a converter would have to be RF-quiet, so as not to interfere with their weak-signal reception. I will be interested to hear what list members recommend. Thank you and 73, John, no8v __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KX3-2M extended receive?
Sorry if this has been brought up before, but I've been off the list for a while and haven't found an answer in the archives. Is there any chance the KX3's 2 meter option could cover receive-only up to about 155 MHz? If not, without going into horrendous detail, what are the technical limitations preventing this (or are they financial as well?) I was glad to see that a 2 meter option is being considered. This sealed the deal for me on the KX3, as I like the idea of a compact HF mobile (and even desktop) unit, and I like to have 2 meters available in the mobile as well - but mainly as a scanner for my local FD/police freqs. I was (an still am) very interested in having this extended receive capability in the K3 as well, but I do understand it's not an option there. Do the KX3 and K3 share the same limitations (or whatever) in regards to lack of extended VHF receive? Not looking to start a wish list war but I suspect extended VHF receive is a pretty common desire for 2 meter users. Even without extended receive on VHF, this rig looks incredibly promising. A K3-ish rig in a K2 package was on my wish list years ago and it looks like Elecraft is about to deliver just that. Thanks, --Andrew, NV1B .. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] SVGA Adapter for P3
Can you give us an update on the SVGA adapter for the P3.Are we days,weeks or months from ordering. Thanks George __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Yocto to Yotta meters
On Fri, Jan 6, 2012 at 5:25 PM, Fred Jensen k6...@foothill.net wrote: Who knows how many new DXCC entities lie out there... === The hard part about working them is that after you call, you have to wait for thousands of years to find out if they came back to you. Tony KT0NY -- http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Yocto to Yotta meters
That even makes a JT65 QSO seem speedy. Rick NHC -Original Message- From: Tony Estep On Fri, Jan 6, 2012 at 5:25 PM, Fred Jensen k6...@foothill.net wrote: Who knows how many new DXCC entities lie out there... === The hard part about working them is that after you call, you have to wait for thousands of years to find out if they came back to you. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Yocto to Yotta meters
On Fri, Jan 6, 2012 at 8:57 PM, Fred Jensen k6...@foothill.net wrote: ... Kind of makes split operation strange. = And after you've waited all that time, just as you hear the guy start to come back to somebody -- is it you?? -- just then, a domestic station with a +20 signal starts calling him zero beat on his frequency, and thirty others jump in going UP UP UP UP. Tony KT0NY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] kx3
Wayne or Eric not to rush you guys but is there any update as to when a preliminary pdf operating manual will be available for the KX3? By the way I paid for mine today! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: data modes - bizarre behavior
Hi Joe, I thought about this a fair bit. Changed USB hubs here a few weeks ago and the new one is A LOT faster. I think it's possible that serial is running through with fewer inter-command delays and also with little time between characters. Using the old, slower USB hub confirms the difference. Really, after all is said, this means the RMS Express program needs better testing and probably a re-code of the Elecraft Radios TNC driver. Thanks for your ideas. 73, matt W6NIA On Mon, 02 Jan 2012 11:30:49 -0500, you wrote: Basically, I can't find the source of this bug, because everything looks fine from the computer side. I believe you will find the bug in the order in which RMS Express sends the commands to the rig. Changing mode after setting frequency and changing data dub-mode after setting frequency *can* result in offsets. In particular, if the digital mode was AFSK or FSK (DT1; or DT2;) switching to DATA A (DT0;) will result in frequency change. The magnitude of that change will depend on the selected RTTY MARK frequency. Note particularly that the displayed frequency does not change but the carrier oscillator (and sideband) do change when switching from AFSK A to DATA A. 73, ... Joe, W4TV On 1/2/2012 10:13 AM, Matt Zilmer wrote: Hi Joe, Thanks. The several MARS frequency matrix docs show center freq of the 3 KHz channel. However, RMS Express compensates for this by subtracting 1.5 KHz so that the suppressed carrier frequency is sent, via the FA command. Example: [CXR freq: 7059.0, center is shown as 7060.5] FA07059000; I already instrumented this with Portmon, and it's correct. My interest here is to find a reason the K3 is set 1.5 KHz higher than the CXR freq, but on RX only. The TX freq is correct (the RMS replies to initial call-ups). Basically, I can't find the source of this bug, because everything looks fine from the computer side. 73, matt W6NIA / NNN0UET On Sun, 01 Jan 2012 17:09:21 -0500, you wrote: Matt, What does your frequency matrix say for center of channel and what is RMS Express setting for DATA A dial (USB carrier) frequency? In DATA A, the dial frequency is identical to the USB carrier frequency. 73, ... Joe, W4TV On 1/1/2012 4:25 PM, Matt Zilmer wrote: Thanks, Joe. I've been with MARS for a few years now and understand the channel center frequency matrix. This is a case where the string setting the K3's carrier freq is setting the correct value. There is something odd at work here. matt On Sun, 01 Jan 2012 15:47:51 -0500, you wrote: Matt, I verified that the software is setting the correct carrier freq, based on the center freq cited by the MARS frequency matrix. I was thinking along the same lines as your suggestion below. Standard practice in government operation - including MARS in recent years - is to specify the center of channel and *not* the USB dial frequency. The two frequencies will differ by 1400 to 1500 Hz based on the particular assumptions used for the transmitter with 1500 Hz being slightly more common. I suspect you will find your MARS matrix specifies center of channel for all digital and any remaining CW networks while still giving USB suppressed carrier frequency for voice networks. 73, ... Joe, W4TV On 1/1/2012 2:25 PM, Matt Zilmer wrote: Thanks for your reply, Bill. I verified that the software is setting the correct carrier freq, based on the center freq cited by the MARS frequency matrix. I was thinking along the same lines as your suggestion below. If I use program control to set the freq, then I get TX + 1.5 KHz = RX. This is with split disabled and RIT / XIT turned off. Temporarily, I'm manually setting the carrier freq to 1.5 KHz below center instead of relying on the control program to do this. That solved the problem, but doesn't explain why the radio has carrier freq centered on the freq only under program control. Mysteries 73, matt W6NIA / NNN0UET On Sun, 01 Jan 2012 13:21:51 -0500, you wrote: Well, this is normal for digital mode DATA A. I'm not familiar with your particular software, but for PSK31 and similar modes, the K3 VFO A is set to a frequency for the carrier. The audio is on the upper sideband, and is centered in the 3 KHz passband which is 1.5kHz up from the carrier. Thus the offset. Some digital software has an allowance for an offset, but I'm not sure about yours. You might check on this. Typically if operating on 20 meters with radio set to 14.070MHz, the waterfall will be full of traces at audio frequencies spread across the passband of your radio. So you actual transmission freq is the sum of VFO plus the audio. ...bill nr4c -Original Message- From: Matt Zilmer [mailto:mzil...@verizon.net] Sent: Sunday, January 01, 2012 11:31 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K3: data modes - bizarre behavior In all this time with K3 #24,
[Elecraft] K2 Receive Issue
Dear Folks: I have a newly built K2 (#6922). It works great, but now (after setting the filters using Spectrogram) I am having a bit of a problem. In order to understand the problem, I need to describe how I am hearing things on the receiver. On CW, I hear a carrier from the other station (i.e., strong carrier but zero beat with my BFO), with the tone of the received signal very loud and strong on one side of the carrier, and quite weak and soft on the other side. My problem is that, when I try and contact someone, it looks like they are hearing me on the frequency that is identical with the weak and soft side, as opposed to the loud and strong side. I called CQ twice recently, got responses both times, but the responding station's signal is on the weak and soft side. I would say that the peak received signal is slightly over 1 khz lower than the transmitted signal. Obviously, this creates a problem for when I try to make a contact. Certainly, it almost completely eliminates my ability to use the filters unless I use RIT or XIT to get the rcvr and the xmtr to separate frequencies. Both RIT and XIT are off when this happens. I am not using split VFO's. Did I screw something up when I set the filters? I didn't seem to have this problem before I reset them. If I did, how would I get back to the old level of performance? I suppose I can just reset them to the values in the manual? Thanks for any help you can give me. 73 de Bernie, KF0QS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: data modes - bizarre behavior
Using the old, slower USB hub confirms the difference. Really, after all is said, this means the RMS Express program needs better testing and probably a re-code of the Elecraft Radios TNC driver. That's strange ... some of the other programs pound the hell out of the K3 controller. Ham Radio Deluxe will dump as many as six commands on the K3 at one time and do it again 5 milliseconds later. Some of the contest programs will poll for both VFO frequencies, FT; (split status) and SB; (dual receive status) all at the same time but they don't seem to have any problems. I do agree that RMS Express need better testing of the Elecraft driver - with special attention to those edge cases where FA changes bands or is an out of band (MARS) frequency. 73, ... Joe, W4TV On 1/7/2012 12:30 AM, Matt Zilmer wrote: Hi Joe, I thought about this a fair bit. Changed USB hubs here a few weeks ago and the new one is A LOT faster. I think it's possible that serial is running through with fewer inter-command delays and also with little time between characters. Using the old, slower USB hub confirms the difference. Really, after all is said, this means the RMS Express program needs better testing and probably a re-code of the Elecraft Radios TNC driver. Thanks for your ideas. 73, matt W6NIA On Mon, 02 Jan 2012 11:30:49 -0500, you wrote: Basically, I can't find the source of this bug, because everything looks fine from the computer side. I believe you will find the bug in the order in which RMS Express sends the commands to the rig. Changing mode after setting frequency and changing data dub-mode after setting frequency *can* result in offsets. In particular, if the digital mode was AFSK or FSK (DT1; or DT2;) switching to DATA A (DT0;) will result in frequency change. The magnitude of that change will depend on the selected RTTY MARK frequency. Note particularly that the displayed frequency does not change but the carrier oscillator (and sideband) do change when switching from AFSK A to DATA A. 73, ... Joe, W4TV On 1/2/2012 10:13 AM, Matt Zilmer wrote: Hi Joe, Thanks. The several MARS frequency matrix docs show center freq of the 3 KHz channel. However, RMS Express compensates for this by subtracting 1.5 KHz so that the suppressed carrier frequency is sent, via the FA command. Example: [CXR freq: 7059.0, center is shown as 7060.5] FA07059000; I already instrumented this with Portmon, and it's correct. My interest here is to find a reason the K3 is set 1.5 KHz higher than the CXR freq, but on RX only. The TX freq is correct (the RMS replies to initial call-ups). Basically, I can't find the source of this bug, because everything looks fine from the computer side. 73, matt W6NIA / NNN0UET On Sun, 01 Jan 2012 17:09:21 -0500, you wrote: Matt, What does your frequency matrix say for center of channel and what is RMS Express setting for DATA A dial (USB carrier) frequency? In DATA A, the dial frequency is identical to the USB carrier frequency. 73, ... Joe, W4TV On 1/1/2012 4:25 PM, Matt Zilmer wrote: Thanks, Joe. I've been with MARS for a few years now and understand the channel center frequency matrix. This is a case where the string setting the K3's carrier freq is setting the correct value. There is something odd at work here. matt On Sun, 01 Jan 2012 15:47:51 -0500, you wrote: Matt, I verified that the software is setting the correct carrier freq, based on the center freq cited by the MARS frequency matrix. I was thinking along the same lines as your suggestion below. Standard practice in government operation - including MARS in recent years - is to specify the center of channel and *not* the USB dial frequency. The two frequencies will differ by 1400 to 1500 Hz based on the particular assumptions used for the transmitter with 1500 Hz being slightly more common. I suspect you will find your MARS matrix specifies center of channel for all digital and any remaining CW networks while still giving USB suppressed carrier frequency for voice networks. 73, ... Joe, W4TV On 1/1/2012 2:25 PM, Matt Zilmer wrote: Thanks for your reply, Bill. I verified that the software is setting the correct carrier freq, based on the center freq cited by the MARS frequency matrix. I was thinking along the same lines as your suggestion below. If I use program control to set the freq, then I get TX + 1.5 KHz = RX. This is with split disabled and RIT / XIT turned off. Temporarily, I'm manually setting the carrier freq to 1.5 KHz below center instead of relying on the control program to do this. That solved the problem, but doesn't explain why the radio has carrier freq centered on the freq only under program control. Mysteries 73, matt W6NIA / NNN0UET On Sun, 01 Jan 2012 13:21:51 -0500, you wrote: Well, this is normal for digital mode DATA A. I'm not familiar with
