[Elecraft] [OT] K3 = Europe, Vertex Sale
I am *very* reliably informed that there's a K3 on its way to Switzerland, I paid Lisa on April 30th (Monday after the big announcement). The sale of Vertex possibly explains the rush of products by Yaesu onto the market this year. Simon Brown, HB9DRV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Motorola to Buy Yaesu
Motorola USA has announced its intention to launch a tender offer to acquire a controlling interest in Vertex Standard Co, Ltd. Vertex Standard is the parent company of Yaesu. Motorola will own 80 percent of Vertex Standard; Tokogiken, a privately held Japanese company, controlled by current president and CEO of Vertex Standard Jun Hasegawa, will retain 20 percent, forming a joint venture. The total purchase price for 80 percent of the outstanding shares on a fully diluted basis will be approximately US $108 million. Somehow I don't think Ham Rigs will be a priority... Vy 73, Bob DJ0MBC/WU5T No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 269.15.22/ - Release Date: 05.11.2007 04:36 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 CW set up
Since the xtal filters in the K3 are roofing filters I'm going with the stock 2.7kHz filter, and just adding wider filters for 10m FM and broadcast AM reception. I'm betting that the DSP will provide all the narrow filtering I'll need. -- Julian, G4ILO K2 s/n: 392 K3 s/n: ??? G4ILO's Shack: www.g4ilo.com Zerobeat Ham Forums: www.zerobeat.net/smf On 11/6/07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: How aie you K3 folks setting it up for QRP cw such as filters, etc? or, i.e. is the basic unit enough or do you do some add-ons? Don't worry, not going to order yet but maybe have one by next fall. Too much fun with K1s and getting my cw into shape right now. TU, 82, John N0LT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft]K3 missing serial numbers
Hi Rowland, Congrats on sn 036. Can you tell me how much the shipping charge was via UPS ? 73 Bryan GM3AKF ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 - Transformer T4 upside down
I've installed T4 upside down, that is wire 3 goes to the 4 hole, and wire 4 goes to the 3 hole, with the same mis-ordering for wires 1 and 2. Is this important? I'm running low on hookup wire so hope I don't have to re-do this. Thanks, Euan M0GBZ No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 269.15.22/1112 - Release Date: 05/11/2007 19:11 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft]K3 missing serial numbers
I think mine was $361 for UPS Worldwide Expedited [GB RG42 3TR] - just realised that's rather high - when I get my letter, I'll check options On 6/11/07 10:42, Bryan [EMAIL PROTECTED] sent: Hi Rowland, Congrats on sn 036. Can you tell me how much the shipping charge was via UPS ? 73 Bryan GM3AKF ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- No sensible decision can be made any longer without taking into account not only the world as it is, but the world as it will be. -Isaac Asimov, scientist and writer (1920-1992) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 and the CW SS
In a message dated 11/5/07 7:22:31 PM Eastern Standard Time, [EMAIL PROTECTED] writes: I wonder, could a computer just run the thing while you are out raking leaves. Most rigs can be software controlled, computers can beat people at chess, why not just have the computer do the contest? Because a computer cannot beat a trained operator at contesting. Yet. Chess is logic, there is nothing left to skill or chance. Contesting is a lot more complex. And because contesting is essentially radiosport. A moped could win the Tour de France, and a rollerblader could win the Olympic marathon in world-record time, but that wouldn't be sporting. Or has all this been done already? The idea is not new. W3FQB (SK) wrote a story called The Man Who Broke The Bank about a techno-ham who built a fully automated SS station and proceeded to make an incredible score. The computer did everything, he just sat and watched it and occasionally keyed it manually just to have something to do. The article was in QST. May, 1953. 73 de Jim, N2EY ** See what's new at http://www.aol.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: Re: [Elecraft] K2 and the CW SS
I wonder, could a computer just run the thing while you are out raking leaves. How about getting the computer to go out and rake the leaves (or mow the lawn) so I can spend more time operating the radio with less distractions? I'd be happy to just go out occasionally to fill up the gas tank just to have something to do. Or better yet, how about finding a neighbor kid to mow the lawn instead. Seems like they don't want to be bothered with such chores anymore, not like when I was a kid! Can't get them interested in earning a few bucks or playing radio, where are we headed? Mark, NK8Q ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 SS
The comments about guys responding off freq reminds me of when I was on a mini-dxpedition to KH9 back in the early 80s. A friend recorded about 30min of my cw pileup and there was one WB8 who called for at least 20 minutes, with a good signal, who was out of my passband. I learned from that to try to zero beat and if not getting thru, move around in the pileup...pretty elementary stuff now but was a 'ahah' back then. I do like the idea of setting up split with my transmit freq locked into VFO B and use the big knob rather than the RIT to tune for those guys a little off freq. The other danger of being off freq is, if I hear you, I will work you, unfortunately, you may have been working someone I cannot hear and our contest exchange timing may have been perfect. Later in the contest, you may show as a worked b4 in my log. Of course the SS exchange (long) pretty much excludes the quick 5NNA3 of the CQWWCW. Looking fwd to using the K3, soon. 73 Tom CX7TT K3 ?? or ??? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 - Transformer T4 upside down
Euan, Wires 1 and 2 are on the same winding, and 3 and 4 are the other winding, and it is symmetrical about the axis that tuns through the center of the core. In other words, if you flip it over in that manner, it looks the same - no need to change it. Now if you had turned it around the other way and soldered the 1-2 winding in the 3-4 holes, that would make a huge difference, and would need to be corrected. 73, Don W3FPR Euan wrote: I've installed T4 upside down, that is wire 3 goes to the 4 hole, and wire 4 goes to the 3 hole, with the same mis-ordering for wires 1 and 2. Is this important? I'm running low on hookup wire so hope I don't have to re-do this. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft_K3] Re: Re K3 delays.
Boy Les did you hit the nail on the head. Having been in this area for the last 30 years -- their business model really did change. Hopefully it does not kill them. In my youth (or yoot since I'm an ex-NYer) I designed board testers. Despite the fact that Technology has improved the K3 group had to design them, debug them and probably has one or two cycles of updates to improve the percentage of faults it detects. In this new model they need to test every board and align every module to make sure it is functions. I would not be surprised to see them at this stage hot slotting them into a K3 to make sure they work. Adding the supplier's screw ups that means rework at Aptos which adds staff and labor and costs. The question is when they will get over their learning curve and be able to produce the sub assemblies at cost and eliminate the rework. It will be interesting to see if they have a good handle on their cost and if the price for future K3's changes (upward. 73 Paul W4MAY Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Elecraft_K3/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Elecraft_K3/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Elecraft] K2s sighted at V8 expedition
http://www.v8.pa7fm.nl/pictures.htm Scroll down to last picture. 73, Bill W4ZV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft_K3] Re: Re K3 delays
As a small manufacturer (much smaller than Elecraft), I can second much of what you say, but I think most of their problems have to do with the product being new, and the order volume probably being higher than projected. That ripples down through the supply chain. The subcontractor issues are totally different at this stage of production than with an ongoing product. Portions of the K2 and some of its options are pre-assembled, and they rely on subcontractors for PCBs, SMT assembly, enclosures, etc., so Elecraft has some experience with this methodology on a smaller scale. FWIW, I would look at the launch of the Orion... a radio almost entirely built in-house by people with lots of manufacturing expertise and experience... and it was delayed over 1 year from introduction ;-) 73, Larry N8LP --- In [EMAIL PROTECTED], lesesq [EMAIL PROTECTED] wrote: For what it's worth, here's my take on the K3 delays. Elecraft is a company that sells kits, not finished products. Virtually all the labor to build the product is supplied by the customer, not Elecraft. This was their business model, and it was hugely successful, because they offered well designed products, excellent instructions, and great support. With the K3, Elecraft changed its business model from a supplier of kits to a supplier of a finished product (either entirely finished by Elecraft or 90% finished by Elecraft with the rest done by the customer). This change in business model required that Elecraft not the customer - supply all or nearly all the labor the get the product built. There were two ways to go: hire people inside or go outside. It appears that Elecraft chose to remain small and go outside, hiring contractors. Once Elecraft did that, it lost control over the timing and results. Further, Elecraft, as a kit company, didn't have experience dealing with contractors supplying labor, which in my experience require constant monitoring to avoid surprises and problems. As with all humans, it is common for contractors to not acknowledge problems, but rather to hope things will work out somehow. From the updates posted by Elecraft it appears that most of the problems have arisen with custom parts (such as toroids) from contractors, and with assembly mistakes by outside board stuffers. Compounding the problem, Elecraft is a very small company (in quantity of business) relative to other companies that do business with the contractors. So, when a contractor's scheduling is tight and a choice has to be made, Elecraft drops to the bottom of the list and the bigger customer gets priority. Also, it sounds like Elecraft didn't second source its suppliers to allow for a parachute if the prime supplier didn't come through. It's not easy to get a finished product in stable production that's an entirely different animal from acquiring parts for a kit and letting the customer supply all the labor to produce the finished product and Elecraft is learning as it goes. As Shakespeare put it, Many a slip `twixt the cup and lip. Elecraft greatly underestimated the difficulty of this process, and because of its inexperience didn't accurately predict the time required. Elecraft built up a lot of goodwill with its kit business and it's riding that to keep things in check with the K3 delays. That's not an inexhaustible supply, however. I'm hopeful this situation will have a happy outcome though obviously very belated for all concerned, especially since I'm on the K3 wait list myself. And Elecraft has probably learned a lot from this experience so that future product releases will be handled very differently. Les WB6MND --- In [EMAIL PROTECTED], Toby Deinhardt dj7mgq@ wrote: I reckon 99.9% would have thought much more highly of Elecraft for a sincere statement like that than the multiple irregular postings advising of further delays. Overly optimistic maybe, unsincere no. I can understand the frustation and I feel it too; I had hoped to christen my K3 first in the IARU Region 1 FD SSB, then after delays in the WAE SSB, still later in the WAG CQWW DX/SSB contests both from 4O. But I also understand that it is very, very difficult to put a time line on this kind of stuff. I have this problem at work with software development all the time. Nevertheless, I feel that Elecraft should take their time, get it right and not cut any corners for the sake of speed. vy 73 de toby Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Elecraft_K3/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Elecraft_K3/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this
[Elecraft] mic plug for K2
Does anyone know where I can get a 8-pin mic plug for the K2? Radio Shack lists it but doesn't seem to have any. Can't find it at Mouser. Thanks. 73, Drew AF2Z ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] mic plug for K2
Try Radio Shack on line. part no 274-025 . $3.99 73, Ken K3IU [EMAIL PROTECTED] wrote: Does anyone know where I can get a 8-pin mic plug for the K2? Radio Shack lists it but doesn't seem to have any. Can't find it at Mouser. Thanks. 73, Drew AF2Z ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] mic plug for K2
Another place to try is Ken's Electronics, http://www.kenselectronics.com/ I bought some 8 pin plugs and line sockets from him within the last month or six weeks. 73 Kevin VK3DAP / ZL2DAP ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] mic plug for K2
Drew, If you have to order on-line, try Buxcomm (www.buxcomm.com). Look for their CBC8 - it is $1.95 and no minimum order. Google for 8 pin microphone connector to find many other sources. 73, Don W3FPR [EMAIL PROTECTED] wrote: Does anyone know where I can get a 8-pin mic plug for the K2? Radio Shack lists it but doesn't seem to have any. Can't find it at Mouser. Thanks. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 CW set up
John, I started back up with the QRP Fox Hunts on 40M. Sometimes there are strong sigs near where the packs are running so I use the 500 Hz filter. I also have the 200 Hz installed so if I really narrow the BW it comes on automatically. But its probably not needed unless there are S9+40 sigs very close to the operating frequency. I would recommend the 500 Hz roofing filter for best performance if you are only looking for one extra roofing filter in addition to the 2.7 kHz that comes with the K3. - 73, Greg - AB7R Whidbey Island WA NA-065 K3#0009 On Tue Nov 6 8:01 , [EMAIL PROTECTED] sent: How aie you K3 folks setting it up for QRP cw such as filters, etc? or, i.e. is the basic unit enough or do you do some add-ons? Don't worry, not going to order yet but maybe have one by next fall. Too much fun with K1s and getting my cw into shape right now. TU, 82, John N0LT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K-2 rev B- Problem - No signals
I have K-2 which worked FB until recently. Now I get no signals on receive. RF gain seems to work as does AF gain. Sig gen set @ 4.915 produces tone in headphones. +5v +8v are OK. RANT is off. D6 anode voltage is OK. I did not build this unit. Any ideas appreciated. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 CW set up
I've settled on the 1 kHz roofing filter to start out with since it will allow a more expansive context when using the Dual-passband CW filter feature, something I'm really interested in. Bob NW8L On 11/6/07, Greg - AB7R [EMAIL PROTECTED] wrote: John, I started back up with the QRP Fox Hunts on 40M. Sometimes there are strong sigs near where the packs are running so I use the 500 Hz filter. I also have the 200 Hz installed so if I really narrow the BW it comes on automatically. But its probably not needed unless there are S9+40 sigs very close to the operating frequency. I would recommend the 500 Hz roofing filter for best performance if you are only looking for one extra roofing filter in addition to the 2.7 kHz that comes with the K3. - 73, Greg - AB7R Whidbey Island WA NA-065 K3#0009 On Tue Nov 6 8:01 , [EMAIL PROTECTED] sent: How aie you K3 folks setting it up for QRP cw such as filters, etc? or, i.e. is the basic unit enough or do you do some add-ons? Don't worry, not going to order yet but maybe have one by next fall. Too much fun with K1s and getting my cw into shape right now. TU, 82, John N0LT ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K-2 rev B- Problem - No signals
Yes, I forgot to mention that. Terry On Nov 6, 2007 10:25 AM, John [EMAIL PROTECTED] wrote: Did you check ANT1/2 selection? John ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Anyone know this info about switching supplies?
Folks: A local discussion has 'erupted' regarding switching poser supplies and whether they can fail in an UNregulated (e.g. high) output voltage condition, or if when they fail will they (almost) always fail in a NO OUTPUT mode? I think this discussion may have been started as a result of a subject here on the reflector about overvoltage protection (OVP), but it's managed to take on a life of its own with respect to the MODES in which a switching P/S can/will fail. Anyone have enough real experience to express their thoughts on this subject. Must admit... I have no clue myself. I've 'heard' that most switchers fail in the NO OUTPUT mode, but this is strictly hearsay. Let's try to get several responses and the let the subject drop before IT takes on a life of its own on the reflector and Eric has to step in... he's busy enough right now. G 73, Tom N0SS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 filter selection -- view from the lab
If you plan to use CW or narrow data modes -- even a little -- you'll want at least one narrow filter (our 500-Hz 5-pole filter is a very cost-effective choice). I'm not trying to sell filters, but I want K3 owners to get the most out of the K3's receiver architecture. It's based entirely on the use of high-performance 1st IF filtering, just like the K2. Only better :) Details: The DSP itself has excellent dynamic range, but its A to D converter is protected by a gain-controlled I.F. amplifier that kicks in at high signal levels. Let's say you're listening to a signal in a 500-Hz DSP bandwidth but using a much wider crystal filter (say 2.7 kHz), when an S9+30 signal pops up just 1 kHz away from your center frequency. This signal would reduce the I.F. gain and thus the noise figure. But if you had the 500-Hz 5-pole filter installed, you would not even know that this interfering signal was there. No effect. Nada. Zip! 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft_K3] K3 Product Launch
My profession is RD, product development and product launch with a $300 million/year company. One alternative to this entire situation would have been for Elecraft to do what we do: Not divulge anything about the product or its launch schedule until all development is finished and all production systems are ready. I've enjoyed watching Elecraft's development with the K3. It's an insight that I normally don't get (because all of our competition keeps everything very quiet and secret as well). Whenever the customer gets any wind of a new product, especially one as exciting as the K3, the risk is very high to keep everyone happy. I don't criticize Wayne and Eric (and the gang) for letting us all know what's happening. After all, they did keep things secret for 3+ years! But as I said, with the first production runs not completed at the time of the announcements, they are taking the risk. I think they knew that, and I think they are so dedicated to getting the job done right that they were willing to take that chance. I haven't ordered a K3 yet, but I will. By not being one of the early adaptors, I reduce the risk for myself as well. - Phil WA7URV Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Elecraft_K3/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Elecraft_K3/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Elecraft] Anyone know this info about switching supplies?
I have never ever seen a Switchmode power supply fail 'high' It's quite possible that sometimes big over-voltage transients may be produced but I have never had anything killed by this myself. I have seen quite a few of these go boom, sometimes with a very big bang and large mains breakers tripping as a result. My experience ranges from various wall wart type SMPS, Computer supplies, ham supplies and server room 48V supplies I would be interested in hearing of other horror stories 73's Brendan EI6IZ On Tue, 2007-11-06 at 09:35 -0600, Tom Hammond wrote: Folks: A local discussion has 'erupted' regarding switching poser supplies and whether they can fail in an UNregulated (e.g. high) output voltage condition, or if when they fail will they (almost) always fail in a NO OUTPUT mode? I think this discussion may have been started as a result of a subject here on the reflector about overvoltage protection (OVP), but it's managed to take on a life of its own with respect to the MODES in which a switching P/S can/will fail. Anyone have enough real experience to express their thoughts on this subject. Must admit... I have no clue myself. I've 'heard' that most switchers fail in the NO OUTPUT mode, but this is strictly hearsay. Let's try to get several responses and the let the subject drop before IT takes on a life of its own on the reflector and Eric has to step in... he's busy enough right now. G 73, Tom N0SS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- Don‘t complain. Nobody will understand. Or care. And certainly don‘t try to fix the situation yourself. It‘s dangerous. Leave it to a highly untrained, unqualified, expendable professional. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] mic plug for K2
Drew Have your local RS use their computer to check with other stores. Out here in CA, they will send stuff from one store to another when needed. Good luck and 73 Bob N6WG - Original Message - From: [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Tuesday, November 06, 2007 6:32 AM Subject: [Elecraft] mic plug for K2 Does anyone know where I can get a 8-pin mic plug for the K2? Radio Shack lists it but doesn't seem to have any. Can't find it at Mouser. Thanks. 73, Drew AF2Z ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Anyone know this info about switching supplies?
If a switcher had a component failure in the feedback loop it would go full bore and probably produce twice its rated output voltage until it totally failed, but none of these components are under much stress, so it's unlikely to happen. The failures are usually the switching transistors or the rectifiers, which both run hot. But these will just kill the supply. So we're pretty safe compared to a linear supply whose pass transistors run hot and might short, passing the total unregulated output voltage to the radio. Dave W5DHM On Nov 6, 2007 10:35 AM, Tom Hammond [EMAIL PROTECTED] wrote: Folks: A local discussion has 'erupted' regarding switching poser supplies and whether they can fail in an UNregulated (e.g. high) output voltage condition, or if when they fail will they (almost) always fail in a NO OUTPUT mode? I think this discussion may have been started as a result of a subject here on the reflector about overvoltage protection (OVP), but it's managed to take on a life of its own with respect to the MODES in which a switching P/S can/will fail. Anyone have enough real experience to express their thoughts on this subject. Must admit... I have no clue myself. I've 'heard' that most switchers fail in the NO OUTPUT mode, but this is strictly hearsay. Let's try to get several responses and the let the subject drop before IT takes on a life of its own on the reflector and Eric has to step in... he's busy enough right now. G 73, Tom N0SS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Anyone know this info about switching supplies?
In the early 80s there was a video game manufacturer that had this exact problem - their power supplies would fail, placing 18 volts on the output, and thus frying the video logic. So, yes, it is quite possible for them to fail full bore. The company is no longer in business... As a further note, the supplies showed up in Radio Shack sometime later where everyone who purchased one of the boards got to see the problem for themselves. At least R.S. was smart enough to label them as surplus... On Nov 6, 2007, at 7:35 AM, Tom Hammond wrote: Folks: A local discussion has 'erupted' regarding switching poser supplies and whether they can fail in an UNregulated (e.g. high) output voltage condition, or if when they fail will they (almost) always fail in a NO OUTPUT mode? I think this discussion may have been started as a result of a subject here on the reflector about overvoltage protection (OVP), but it's managed to take on a life of its own with respect to the MODES in which a switching P/ S can/will fail. Anyone have enough real experience to express their thoughts on this subject. Must admit... I have no clue myself. I've 'heard' that most switchers fail in the NO OUTPUT mode, but this is strictly hearsay. Let's try to get several responses and the let the subject drop before IT takes on a life of its own on the reflector and Eric has to step in... he's busy enough right now. G 73, Tom N0SS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com - Jack Brindle, W6FB - ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Anyone know this info about switching supplies?
Since building switchers for the military is my profession these days i would like to think i have some authority on the subject. Failures can occur almost anywhere in a switcher and the most typical type depends on the topology of the supply. Typically there is a pass transistor on the input that will turn off power to the whole supply (at least in my designs) if anything goes out of spec however i would bet in cheap commercial supplies this is not always the case. My most common failure in lab tests for me is the primary side transistor, what happens depends on whether the transistor fails short or open. If it fails open you typically have no voltage on the output (again this is dependent on topology) but if it fails closed, you can get runaway on the output in certain topologies. I would like to think any 'smart' design has a pass transistor and enough bit and supervision circuitry as to shut the supply down if something goes wrong, Component failure in the feedback loop is going to be rare, as these are typically passive components, either a resistive divider, a sense winding on the transformer, these parts typically don't fail, and if they do, they fail in spectacular fashion which usually gives you a clue something is going wrong. Matt KD8DAO ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft]K3 missing serial numbers
Good grief! You people over there must really love Elecrafts. John [K7SVV] - Original Message - From: David Ferrington, M0XDF [EMAIL PROTECTED] To: Bryan [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Tuesday, November 06, 2007 4:07 AM Subject: Re: [Elecraft]K3 missing serial numbers I think mine was $361 for UPS Worldwide Expedited [GB RG42 3TR] - just realised that's rather high - when I get my letter, I'll check options On 6/11/07 10:42, Bryan [EMAIL PROTECTED] sent: Hi Rowland, Congrats on sn 036. Can you tell me how much the shipping charge was via UPS ? 73 Bryan GM3AKF ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- No sensible decision can be made any longer without taking into account not only the world as it is, but the world as it will be. -Isaac Asimov, scientist and writer (1920-1992) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.503 / Virus Database: 269.15.22/ - Release Date: 11/5/2007 4:36 AM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Anyone know this info about switching supplies?
A local discussion has 'erupted' regarding switching poser supplies and whether they can fail in an UNregulated (e.g. high) output voltage condition, or if when they fail will they (almost) always fail in a NO OUTPUT mode? I've never seen this happen myself, but I just added a task to my firmware list to turn the K3 off automatically if there's a persistent overvoltage condition (say, 17 V for several seconds). 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Anyone know this info about switching supplies?
Hi All I ran the engineering department at a semiconductor burn lab for some years and we had well over a thousand power supplies of analog, switchers and SCR pre-regulated designs. We even modified Hobart MIG welders into power supplies (0-60 volts up to 600 amps). It has been my experience that the switchers will fail in a no output mode most of the time. This makes sense because the usual failing part is the switching transistors. If one or more of them fail the primary fuse will usually blow. With the output fed from transformer secondary there will be no output voltage or low output even if the fuse does not blow because of the distorted waveform driving the transformer. Analog power supplies usually fail by going to the rail because the series pass transistor shorts and connects the raw supply to the output. This is why most high end analog power supplies have some kind of crowbar circuit on the output that shorts the output if it exceeds some set voltage. It is always possible that the regulator could fail or even the feedback circuit that sets the output voltage could fail and cause an overvoltage condition although this is very rare. A dirty pot or loose connection at the Kelvin jumpers can cause any supply to go to the rail. A crowbar circuit would be easy to add to any power supply. A power SCR, a few resistors, a zener and a fuse is all that is needed. Some of the power supply Mfg sold these as an outboard add on for their supplies.Don Brown KD5NDB Date: Tue, 6 Nov 2007 09:35:11 -0600 To: elecraft@mailman.qth.net From: [EMAIL PROTECTED] Subject: [Elecraft] Anyone know this info about switching supplies? Folks: A local discussion has 'erupted' regarding switching poser supplies and whether they can fail in an UNregulated (e.g. high) output voltage condition, or if when they fail will they (almost) always fail in a NO OUTPUT mode? I think this discussion may have been started as a result of a subject here on the reflector about overvoltage protection (OVP), but it's managed to take on a life of its own with respect to the MODES in which a switching P/S can/will fail. Anyone have enough real experience to express their thoughts on this subject. Must admit... I have no clue myself. I've 'heard' that most switchers fail in the NO OUTPUT mode, but this is strictly hearsay. Let's try to get several responses and the let the subject drop before IT takes on a life of its own on the reflector and Eric has to step in... he's busy enough right now. G 73, Tom N0SS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Anyone know this info about switching supplies?
WB: We're discussing it here right now... what would the 'damages' be if a supply (ANY supply) could/would fail placing 24VDC at up to 30A on the K3's DC line? I'm thinking about designing an external plug-in OVP kit. Unless YOU want to do it. T At 10:45 11/06/2007, wayne burdick wrote: A local discussion has 'erupted' regarding switching poser supplies and whether they can fail in an UNregulated (e.g. high) output voltage condition, or if when they fail will they (almost) always fail in a NO OUTPUT mode? I've never seen this happen myself, but I just added a task to my firmware list to turn the K3 off automatically if there's a persistent overvoltage condition (say, 17 V for several seconds). 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft_K3] K3 Product Launch
I agree what you said for a $300 million? business. I have been in management of projects that have a 5 year budget in that area. But Elecraft is far from that. I see many plusses from announcing the product when they did. Add in a little enthusiatic optimism coupled with the knowledge they have a faithful following, they have been able to divert potential business from straying - which helped me make my decision to buy since I was in the market. The down payment was no issue with me, either, you either pay now or pay later, with interest to their financier.? So, rather than place them in a takeover position, I was happy to do the $ down. A lot can be said about a bigger company having in-situ production capability, but that wasn't always the case, i.e. it is Elecraft's time to move on. They should be thankful that they didn't eat the investment over in-house capability with out-sourced PCBs coming to maturity. The painful result of having a full vertically integrated facility at this?date is the?process of dismantling it and transitioning to outsourcing is rife with conflict. What do we do if outsource causes problems we can't fix and decide to go back?? Who pays for it (duh, the customer) and so on. Anyway. . . it's done and it will be great. By taking the 'risk' I'll have my K3 on the air this evening. 73,? Al WA6VNN -Original Message- From: Phil Westover [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tue, 6 Nov 2007 8:01 am Subject: [Elecraft_K3] K3 Product Launch My profession is RD, product development and product launch with a $300 million/year company. One alternative to this entire situation would have been for Elecraft to do what we do: Not divulge anything about the product or its launch schedule until all development is finished and all production systems are ready. I've enjoyed watching Elecraft's development with the K3. It's an insight that I normally don't get (because all of our competition keeps everything very quiet and secret as well). Whenever the customer gets any wind of a new product, especially one as exciting as the K3, the risk is very high to keep everyone happy. I don't criticize Wayne and Eric (and the gang) for letting us all know what's happening. After all, they did keep things secret for 3+ years! But as I said, with the first production runs not completed at the time of the announcements, they are taking the risk. I think they knew that, and I think they are so dedicated to getting the job done right that they were willing to take that chance. I haven't ordered a K3 yet, but I will. By not being one of the early adaptors, I reduce the risk for myself as well. - Phil WA7URV Email and AIM finally together. You've gotta check out free AOL Mail! - http://mail.aol.com
[Elecraft] Re: Anyone know this info about switching supplies?
Tom Hammond wrote: WB: We're discussing it here right now... what would the 'damages' be if a supply (ANY supply) could/would fail placing 24VDC at up to 30A on the K3's DC line? I'm thinking about designing an external plug-in OVP kit. Unless YOU want to do it. The K3 already has OVP built-in, in the form of high-current, high-power zener clamp that kicks in at around 16 V. It can handle hundreds of amps for long enough to blow the self-resetting polyfuse (F2 on the RF board schematic). An identical device is used on the KPA3, which has its own circuit breaker. So the OVP is very rugged and reliable. In addition, as a backup, the K3 will turn itself off if it senses an over-voltage condition. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Anyone know this info about switching supplies?
Damn Wayne... you DO think of everything! 73, Tom At 11:09 11/06/2007, wayne burdick wrote: Tom Hammond wrote: WB: We're discussing it here right now... what would the 'damages' be if a supply (ANY supply) could/would fail placing 24VDC at up to 30A on the K3's DC line? I'm thinking about designing an external plug-in OVP kit. Unless YOU want to do it. The K3 already has OVP built-in, in the form of high-current, high-power zener clamp that kicks in at around 16 V. It can handle hundreds of amps for long enough to blow the self-resetting polyfuse (F2 on the RF board schematic). An identical device is used on the KPA3, which has its own circuit breaker. So the OVP is very rugged and reliable. In addition, as a backup, the K3 will turn itself off if it senses an over-voltage condition. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft_K3] K3 Product Launch
I'm taking a lot out of context here, but pity those who purchased a very expensive high-end radio a few years ago based on marketing hype. The manufacturer still has not addressed outstanding probelms, those who bought got bitten, so even buying 'off the shelf' can be a risk. Simon Brown, HB9DRV - Original Message - From: [EMAIL PROTECTED] By taking the 'risk' Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Elecraft_K3/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Elecraft_K3/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Elecraft]K3 missing serial numbers
Certainly do, just they are like Rocking Horse Poo right now! I should point out the order was for a full K3, all options, MH2, Proset, HexKey and XV144 - so will be a BIG box :-) On 6/11/07 16:39, John [K7SVV] [EMAIL PROTECTED] sent: Good grief! You people over there must really love Elecrafts. John [K7SVV] - Original Message - From: David Ferrington, M0XDF [EMAIL PROTECTED] To: Bryan [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Tuesday, November 06, 2007 4:07 AM Subject: Re: [Elecraft]K3 missing serial numbers I think mine was $361 for UPS Worldwide Expedited [GB RG42 3TR] - just realised that's rather high - when I get my letter, I'll check options -- Any fool can destroy trees. They cannot defend themselves or run away. And few destroyers of trees ever plant any; nor can planting avail much toward restoring our grand aboriginal giants. It took more than three thousand years to make some of the oldest of the Sequoias, trees that are still standing in perfect strength and beauty, waving and singing in the mighty forests of the Sierra. -John Muir, naturalist, explorer, and writer (1838-1914) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 CW set up
I set up my K3 for RTTY and CW especially with the 8poles and 400 and 250. It depends what you want for CW - do you want to isolate signals or is a wider passband your normal procedure? I can tell you that the DSP does a very nice job narrowing the BW to isolate signals down to 100 or even 50 Hz (nice for isolating the response of a weak VO1 from the QRM of calling stations, for example.) But when you cross from 450 to 400 or 300 to 250 and the narrower roofing filter kicks in it is like a brick wall slams down. You really can hear the difference. Reducing interference from close stations is imperative in RTTY, I'm looking forward to trying it out in the next RTTY contest. I've also ordered the 1.8KHz filter for phone contests - especially SS phone! I have the 1.8KHz roofer for the FT1000D, it'll be interesting to compare them. hope this helps - jeff wk6i -- Jeff Stai [EMAIL PROTECTED] Twisted Oak Winery http://www.twistedoak.com/ Winery Blog http://www.elbloggotorcido.com/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Yaesu/Motorola
Don't rule out the parent company of ALINCO from buying Yaesu from Motorola. These people are not too large in Amateur radio equipment but they are a big electronics company. They do sell lots of commercial VHF/UHF gear worldwide and they have a desire to offer better HF gear then they presently offer to the Ham Community. Another possibility is to combine Yaesu with Icom but Alinco is my first guess. I would not expect to see any spin off from Motorola for one year from the time of acquesition. Lee, w0vt ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KBPF3 frequency range
I'm considering adding a KBPF3 to my growing order list but I am curious as to what is the range of frequencies that are covered with this filter. Did I miss seeing it when I searched the Elecraft site? Nelson, K8DJC -- I am using the free version of SPAMfighter for private users. It has removed 1949 spam emails to date. Paying users do not have this message in their emails. Get the free SPAMfighter here: http://www.spamfighter.com/len ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: KBPF3 frequency range
Hi Nelson, The KBPF3 extends coverage to 0.5-30 MHz continuous, except for a small gap right around the first I.F. (8.215 MHz). It has no impact on the 6-meter coverage (specified from 50-54 and tunable down to 48 MHz). 73, Wayne N6KR On Nov 6, 2007, at 9:05 AM, Nelson Wittstock wrote: I'm considering adding a KBPF3 to my growing order list but I am curious as to what is the range of frequencies that are covered with this filter. Did I miss seeing it when I searched the Elecraft site? --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft_K3] K3 Product Launch
That's been my rant for at least 5 months now. 73 de WA6VNN sn31 and ready for your next prod. -Original Message- From: Simon Brown [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tue, 6 Nov 2007 9:31 am Subject: Re: [Elecraft_K3] K3 Product Launch I'm taking a lot out of context here, but pity those who purchased a very expensive high-end radio a few years ago based on marketing hype. The manufacturer still has not addressed outstanding probelms, those who bought got bitten, so even buying 'off the shelf' can be a risk. Simon Brown, HB9DRV - Original Message - From: [EMAIL PROTECTED] By taking the 'risk' Email and AIM finally together. You've gotta check out free AOL Mail! - http://mail.aol.com
[Elecraft] Shipping Costs
I have had a large number of private emails regarding delivery costs via UPS of the K3 to the UK. My order was sent via UPS at a cost of around £80 using the express option. I think this is listed as an option on the order page so exact costs should be calculated from there. Its expensive I know but not prohibitive Regards Rowland G4APO ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Rick Tavan's excellent K3 article.
http://www.zerobeat.net/mediawiki/index.php/NCJ_Reviews:_The_Elecraft_K3_-_First_Impressions N6XI Rick's masterpiece which was done for the ARRL's National Contest Journal is now available on the K3 wiki. Also... More information on K3 measurements and specifications has been added: http://www.zerobeat.net/mediawiki/index.php/K3_Measurements_and_Specifications And N1EU Barry has added some more great info about K3 at: http://www.zerobeat.net/mediawiki/index.php/K3_Stereo_Diversity_Reception_and_SO2V_Contesting t u Don ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 receiver sensitivity on 50MHz
Wayne Burdick wrote: The KBPF3 extends coverage to 0.5-30 MHz continuous, except for a small gap right around the first I.F. (8.215 MHz). It has no impact on the 6-meter coverage (specified from 50-54 and tunable down to 48 MHz). On the subject of 50MHz, Wayne, please could you say more about the receiver sensitivity specification? At present the sensitivity spec is the same on all bands, namely: -136 dBm (typical), preamp on, 500Hz b/w. Assuming that figure represents the noise floor, it is more than adequate for HF (and maybe even 'too good' for the lower bands); but in VHF-speak it translates to a noise figure of 13.6dB, which is less than stellar. Could you comment, please? -- 73 from Ian GM3SEK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Rick Tavan's excellent K3 article
I agree that's it's generally a well written and informative article. However, I couldn't help raising my eyebrows at the QSK provides true between-dots receive at high speed - doesn't really say much. Is that 20wpm or 45wpm? Have any of the K3 users really sat down and tested the QSK and can report at how high a keying speed the K3 receiver recovers between dits? The cw rise time and rx AGC settings used for the test would also be useful to know. Thanks 73, Barry N1EU ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: K3 receiver sensitivity on 50MHz
Ian White GM3SEK wrote: On the subject of 50MHz, Wayne, please could you say more about the receiver sensitivity specification? At present the sensitivity spec is the same on all bands, namely: -136 dBm (typical), preamp on, 500Hz b/w Hi Ian, The K3 is optimized for high dynamic range, which requires a high-intercept preamp and mixer as well as the narrowest possible band-pass filters (consistent with good return loss). We also used PIN diode T-R switching to eliminate relays during QSK. There are small front-end losses associated with each of these design choices. However, there is a way that one could have the best of both worlds. Those who would like an extremely low NF on 6 meters (or other bands) could patch in an external low-noise preamp between the RX ANT IN and OUT jacks. I've asked one our staff engineers to look into such a design, although there may be third-party products already available. You'd need the KXV3 option. The KXV3's RX ANT IN/OUT jacks are fully isolated from the transmit path, so high-sensitivity devices could be used in the preamp. The RX ANT IN/OUT jacks are also pre-BPF and can be turned on/off per-band. A 6-meter-only implementation with its own optimized BPFs could provide a world-class NF. Further, you could power the external preamp from the K3's 12-V DC accessory output (up to 0.5 A, switched). I personally prefer this means of achieving a very low 6-meter NF, because it doesn't result in compromises to the rest of the design. There are other rigs on the market that incorporate a second, switchable preamp specifically for this purpose, but none of these can match the K3's close-in dynamic range on HF. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Rick Tavan's excellent K3 article.
The site already a review page at [K3 Press Reviews] but it doesn't list this new article. I went to add a link to it but the, but [K3 Press Reviews] page wasn't editable. In fact, I couldn't find a single page on the site that was editable, even though I have an account and was logged in. Is this perhaps an oversight? Leigh/WA5ZNU http://www.zerobeat.net/mediawiki/index.php/NCJ_Reviews:_The_Elecraft_K3_-_First_Impressions ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Rick Tavan's excellent K3 article.
I have to say, although this isn't quite how I envisioned the Wiki working (I'm actually a TWiki man) - this certainly is a great site filling up with info. I'm not suggesting this replaces the reflector and I don't think Don and Thom were aiming for that - but it certainly does provide a good location to place static (in terms of web dynamics) content. This is going to be invaluable to K3 owners. Also to K1-K2 owners if all the info I see on the reflector and the accumulated knowledge goes in here. On 6/11/07 19:23, Don Rasmussen [EMAIL PROTECTED] sent: http://www.zerobeat.net/mediawiki/index.php/NCJ_Reviews:_The_Elecraft_K3_-_Fir st_Impressions -- When one tugs at a single thing in nature, he finds it attached to the rest of the world. -John Muir, naturalist, explorer, and writer (1838-1914) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] [K3] CE Mark
Toby Deinhardt wrote: No CE mark seen but I dont think it needs one in Kit form. For the kit version likely not, but, afaik, anyone who ordered an Although it might be technically legal (speculation), I very much doubt that the kit exemption envisaged a pre-aligned sub-assembly kit, like the K3. As far as I remember, the equivalent position for PCs is that board level components have to have individual EMC certification. In that case, they can be certified based on using extremely good cases, etc., but the K3 components are only intended to be used in a K3, so that loophole won't work. -- David Woolley Emails are not formal business letters, whatever businesses may want. RFC1855 says there should be an address here, but, in a world of spam, that is no longer good advice, as archive address hiding may not work. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Rick Tavan's excellent K3 article.
Reading this article, something's just occurred to me - with the KRX3 installed, I can switch between VFOb and KRX3 by turning it off - does that gain me anything? On 6/11/07 19:23, Don Rasmussen [EMAIL PROTECTED] sent: http://www.zerobeat.net/mediawiki/index.php/NCJ_Reviews:_The_Elecraft_K3_-_Fir st_Impressions -- One glance at a book and you hear the voice of another person, perhaps someone dead for 1,000 years. To read is to voyage through time. -Carl Sagan, astronomer and writer (1934-1996) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] [K3] CE Mark
Although it might be technically legal (speculation), I very much doubt that the kit exemption envisaged a pre-aligned sub-assembly kit, As much as I hate to bother Eric right now, maybe he could give us a short update on the CE Marking certification status of the K3. Eric was looking into the legal situation and preparing to have the K3 certified back in April/May (shortly after the announcement). It would be a real pity if this creates problems for anyone on our side of the the Atlantic. vy 73 de toby ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] [K3] CE Mark
An interesting parallel with home-build PCs, but the difference is that PC boards are sold separately on the open market and in theory can be connected with many other manufacturers' boards to make up a system; as such I would interpret them as products within their own right. The K3 boards are not on the open market as products, they are only viable when coupled together, ie unique to the final unit which is the K3. This is a kit of unique parts for one use, not a collection of various manufacturers' products. IMHO. David G3UNA - Original Message - From: David Woolley [EMAIL PROTECTED] To: Elecraft List elecraft@mailman.qth.net Sent: Tuesday, November 06, 2007 9:17 PM Subject: Re: [Elecraft] [K3] CE Mark Toby Deinhardt wrote: No CE mark seen but I dont think it needs one in Kit form. For the kit version likely not, but, afaik, anyone who ordered an Although it might be technically legal (speculation), I very much doubt that the kit exemption envisaged a pre-aligned sub-assembly kit, like the K3. As far as I remember, the equivalent position for PCs is that board level components have to have individual EMC certification. In that case, they can be certified based on using extremely good cases, etc., but the K3 components are only intended to be used in a K3, so that loophole won't work. -- David Woolley Emails are not formal business letters, whatever businesses may want. RFC1855 says there should be an address here, but, in a world of spam, that is no longer good advice, as archive address hiding may not work. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] [K3] CE Mark
Hi David, Since the K3 kit requires 7 to 8 hours of customer assembly of our components following the detailed steps in our 60 page assembly manual, and because it does involve customer alignment and set up of the PLL, filters etc (via the front panel interface) it clearly does fall under the amateur radio kit CE exemption. We do some of the alignment for you, but you certainly get to do some too. Any your quality of assembly/test/alignment directly impacts the final performance of the radio. This is not your father's four board plug together home built PC :-) Also, the regular CE statement of conformity for built products requires us to maintain manufacturing quality information and processes on the final built product. Something that is impossible for us to do on a customer built kit, since we have no control over the customer. While we certainly have designed the K3 to exceed any requirements in this area, it is clear that if the final assembly is done by the customer that we have no way of absolutely guaranteeing or controlling this. That's another reason for the creation of the exemption for amateur radio kits. The regulators obviously felt that since the builder's were licensed amateur radio operators in most cases, they were trained in the art and would maintain a reasonable level of quality on their own. Thus its impossible for a manufacturer= to issue a CE statement on any amateur radio kit. And as far as Toby's question on CE for the built K3 - Yes, we will not ship built K3s for sale to the EC until we have finished the test suite for CE on them. We had to wait until we were shipping to run the tests on actual production units. We're completing this testing now. Fortunately the CE statement of conformity is a self certification by the manufacturer (us) and does not require any regulatory filing or approval through bureaucratic channels etc. As a side note: Some of tests required for CE are pretty bizarre when applied to a ham radio transceiver - As an example the radio must be tested for spurious emissions from the radio in receive mode even though the acceptable levels for spurious and on channel signals in transmit far exceed these RX test values. It looks like most of the regulations were written for commercial radio equipment that was intended for use by non-technical users from the general public. Fortunately, we easily exceed these requirements. Just a lot of formal testing and paperwork to do! 73, Eric WA6HHQ - David Woolley wrote: Toby Deinhardt wrote: No CE mark seen but I dont think it needs one in Kit form. For the kit version likely not, but, afaik, anyone who ordered an Although it might be technically legal (speculation), I very much doubt that the kit exemption envisaged a pre-aligned sub-assembly kit, like the K3. As far as I remember, the equivalent position for PCs is that board level components have to have individual EMC certification. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] [K3] CE Mark
Hi David, I agree with this point too. All of the components of the K3 are designed only for use inside that radio and not as general general options for other manufacturer's products. The boards are not stand alone products. 73, Eric WA6HHQ David Cutter wrote: An interesting parallel with home-build PCs, but the difference is that PC boards are sold separately on the open market and in theory can be connected with many other manufacturers' boards to make up a system; as such I would interpret them as products within their own right. The K3 boards are not on the open market as products, they are only viable when coupled together, ie unique to the final unit which is the K3. This is a kit of unique parts for one use, not a collection of various manufacturers' products. IMHO. David G3UNA ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] [K3] CE Mark
In what way do you envision? Its reached at least one 'G' now - I don't care about CE at all - it isn't worth the paper its printed (or often not) on. I've come across quite a lot of imported gear with a CE - no way does it meet even the most basic standard. Sorry, this came out confrontational - its not meant to be. But frankly - I just want my K3 and I don't care about 'useless' certification. On 6/11/07 21:50, Toby Deinhardt [EMAIL PROTECTED] sent: It would be a real pity if this creates problems for anyone on our side of the the Atlantic. -- A bit of fragrance always clings to the hand that gives the rose. -Chinese proverb ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Wiki oversight?, etc...
Leigh WA5ZNU wrote: In fact, I couldn't find a single page on the site that was editable, even though I have an account and was logged in. Is this perhaps an oversight? snip Dear Leigh, It's agreed that a typical wiki deals with dynamic information, it is constantly growing and changing. There are (rather strict) authoring standards and all kinds of people behind the scenes at the wiki to keep the content and correct and politically safe. The K3 wiki does not need to be this dynamic with respect to changes. Sure it would be more convenient, but the existing pages are basically static so they don't need to be changed rapidly. New pages -can- be added by anyone at any time. The inherent problem is the eHam types and the K3 wiki sysops simply don't have the time to follow them and clean up their mess. The view is there would be far more prank and troll postings than actual submissions of valuable K3 text, so it would become a daily chore for someone to chase down bogus pages and restore old content. That having been said, we invite everyone on this list to take part in the wiki. Register yourself (all you need is a username and a password), add a page, then submit it to any sysop listed on the main page to be linked into one of the existing (protected) pages. You can also copy the source from the existing page you want to change into your new revised page, then notify the sysops that you want a change. It's great to see the wiki evolving, one of the fun parts has been placing the comments and serial numbers from each new K3 owners and placing them as a chronology on the serial numbers page. Mostly this site is to promote K3 and Elecraft (Lisa Jones), so you won't find too much that's controversial on those pages. !!! In other words - tone counts. You will find all the information that is there to be on topic for K3. I use the wiki as my entry point for my browser to the elecraft digest list. Look under related links. For K3 go to: http://www.zerobeat.net/mediawiki/index.php/K3_Wiki_at_ZeroBeat.NET or for the kits page: http://www.zerobeat.net/mediawiki/index.php/KX1_K1_K2_Wiki_at_ZeroBeat.NET That's the scoop, check it out. [Elecraft] Rick Tavan's excellent K3 article. Leigh L Klotz, Jr. Leigh at WA5ZNU.org Tue Nov 6 15:13:18 EST 2007 Previous message: [Elecraft] Rick Tavan's excellent K3 article. Next message: [Elecraft] Rick Tavan's excellent K3 The site already a review page at [K3 Press Reviews] but it doesn't list this new article. I went to add a link to it but the, but [K3 Press Reviews] page wasn't editable. In fact, I couldn't find a single page on the site that was editable, even though I have an account and was logged in. Is this perhaps an oversight? Leigh/WA5ZNU http://www.zerobeat.net/mediawiki/index.php/NCJ_Reviews:_The_Elecraft_K3_-_First_Impressions ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] [K3] CE Mark
Hallo David, AFAIK, you as the importer of electronic devices are responsible for conformity with EU regulations, whether they make sense or not. It is easy to imagine an official, with nothing better to do, causing serious problems for the importer of said equipment. A lot of what is in the CE marking requirements, imvho, make good sense, but there is no real mechanism to enforce them, especially because the CE Marking uses a self certification system. It is far too easy for producers and/or European importers/distributors to fudge on their certification and conformity. Which, as you correctly noted, often makes the CE Marking almost worthless. Sorry, this came out confrontational - its not meant to be. But frankly - I just want my K3 and I don't care about 'useless' certification. I also want my K3 (kit) but would hate to see Elecraft and/or Elecraft's customers run into any problems, just because a CE Marking was missing. vy 73 de toby PS: I am not a lawyer, so any and all of the above could be wildly false. PPS: I did not take your mail as confrontational. No worries here. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Rick Tavan's excellent K3 article
Yes, my comments in that article were subjective. The test labs will run receiver recovery tests that I'm not equipped to do. I ran an informal test with N6TV a few months ago while the K3 keying firmware was still in development. I sent a string of dits on the K3 and he tried to break me with one (1) dit at the same speed. I used fast AGC but did not record the CW rise time or AGC parameters in effect at the time. At 20 wpm it was easy. At 30 it was hard, sometimes taking multiple breaking dits or a dah. There were a few artifacts back then. The QSK improved considerably after that as the firmware reached production release but I haven't repeated the test. Right now, at 100W out and S2 line noise, I can hear the noise clearly while sending at 30 WPM. It sounds like a code practice oscillator and is clearly superior to the TS-930S sitting next to it. (The 930 has some clicky artifacts that don't exist on the K3.) At 40 WPM, the received noise is almost gone behind a string of dits but you can still hear it between letters. Sorry, this is still subjective. If you want to do some on-the-air tests, I'll be happy to help. Of course, any radio will have its QSK degraded when there are ionospheric echos. We should be so lucky these days! 73, /Rick N6XI -- N1EU Wrote --- I agree that's it's generally a well written and informative article. However, I couldn't help raising my eyebrows at the QSK provides true between-dots receive at high speed - doesn't really say much. Is that 20wpm or 45wpm? Have any of the K3 users really sat down and tested the QSK and can report at how high a keying speed the K3 receiver recovers between dits? The cw rise time and rx AGC settings used for the test would also be useful to know. Thanks 73, Barry N1EU ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: K3 receiver sensitivity on 50MHz
Wayne wrote: Ian White GM3SEK wrote: On the subject of 50MHz, Wayne, please could you say more about the receiver sensitivity specification? At present the sensitivity spec is the same on all bands, namely: -136 dBm (typical), preamp on, 500Hz b/w Hi Ian, The K3 is optimized for high dynamic range, which requires a high-intercept preamp and mixer as well as the narrowest possible band-pass filters (consistent with good return loss). We also used PIN diode T-R switching to eliminate relays during QSK. There are small front-end losses associated with each of these design choices. However, there is a way that one could have the best of both worlds. Those who would like an extremely low NF on 6 meters (or other bands) could patch in an external low-noise preamp between the RX ANT IN and OUT jacks. I've asked one our staff engineers to look into such a design, although there may be third-party products already available. You'd need the KXV3 option. The KXV3's RX ANT IN/OUT jacks are fully isolated from the transmit path, so high-sensitivity devices could be used in the preamp. The RX ANT IN/OUT jacks are also pre-BPF and can be turned on/off per-band. A 6-meter-only implementation with its own optimized BPFs could provide a world-class NF. Further, you could power the external preamp from the K3's 12-V DC accessory output (up to 0.5 A, switched). I personally prefer this means of achieving a very low 6-meter NF, because it doesn't result in compromises to the rest of the design. There are other rigs on the market that incorporate a second, switchable preamp specifically for this purpose, but none of these can match the K3's close-in dynamic range on HF. 73, Wayne N6KR Thank you for the prompt and thoughtful reply. Nobody should join a mindless stampede for the lowest possible NF on 6 metres. For more than 20 years, I have been urging VHF/UHF DXers to optimize their dynamic range in exactly the same way that we do on HF. The receiver noise floor at VHF needs to be lower than at HF, to take advantage of the lower antenna noise level; but it's a very delicate tradeoff. Above all, it is vital to use no more preamp gain than absolutely necessary, because unnecessary gain will have a dB-for-dB impact on the strong-signal handling. The optimum solution is always to use a preamp at the antenna; but that isn't always practical, which is why most transceivers offer the option of a built-in preamp. The band-definable RX IN/OUT jacks on the KXV3 will allow us to use a dedicated 6m preamp - if not actually inside the rig, at least right behind it. Should Elecraft supply a 6m preamp as an option for the K3? Yes, I think you should, because third-party preamps are notorious for having far too much gain. To preserve the K3's reputation for high dynamic range on *all* bands, it would be best to keep the gain/NF tradeoffs for 6m under factory control. Obviously this option is not a high priority; but it certainly would be worthwhile. -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: K3 receiver sensitivity on 50MHz
Ian White GM3SEK wrote: Should Elecraft supply a 6m preamp as an option for the K3? Yes, I think you should, because third-party preamps are notorious for having far too much gain. To preserve the K3's reputation for high dynamic range on *all* bands, it would be best to keep the gain/NF tradeoffs for 6m under factory control. Obviously this option is not a high priority; but it certainly would be worthwhile. Thanks for the suggestions, Ian. We'll look into this. I should mention that the operator would be able to turn the K3's regular preamp off when using the external preamp, if desired (and/or turn on the attenuator). Thus there would be a full range of possible NF/dynamic range tradeoffs under convenient operator control. (The on/off state of both the attenuator and regular preamp are stored per-RX ANT switch state.) 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Anyone know this info about switching supplies?
We use nothing but switching supplies in my industry, and I have NEVER had one fail and take out what it powers. Talking about 10,000 or so supplies. I dont know much about the ham type stuff, except to stay away from anything made by mfj... Brett N2DTS - Original Message - From: Tom Hammond [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Tuesday, November 06, 2007 10:35 AM Subject: [Elecraft] Anyone know this info about switching supplies? Folks: A local discussion has 'erupted' regarding switching poser supplies and whether they can fail in an UNregulated (e.g. high) output voltage condition, or if when they fail will they (almost) always fail in a NO OUTPUT mode? I think this discussion may have been started as a result of a subject here on the reflector about overvoltage protection (OVP), but it's managed to take on a life of its own with respect to the MODES in which a switching P/S can/will fail. Anyone have enough real experience to express their thoughts on this subject. Must admit... I have no clue myself. I've 'heard' that most switchers fail in the NO OUTPUT mode, but this is strictly hearsay. Let's try to get several responses and the let the subject drop before IT takes on a life of its own on the reflector and Eric has to step in... he's busy enough right now. G 73, Tom N0SS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Rick Tavan's excellent K3 article
Rick Tavan N6XI wrote: Right now, at 100W out and S2 line noise, I can hear the noise clearly while sending at 30 WPM. It sounds like a code practice oscillator and is clearly superior to the TS-930S sitting next to it. (The 930 has some clicky artifacts that don't exist on the K3.) I used the K3 in the Sweepstakes, and most of the time I (well, the computer) was CQing at 30 wpm. Sometimes a guy would call me a little late after I had started another CQ. I heard these guys right away and killed the CQ, usually missing (or often, not missing!) just the first letter of his call. I've found with other radios that the sidetone was too clicky or thumpy to use in a contest, and I always ended up with semi-QSK. The K3 is the first radio that I can comfortably run in full QSK in a contest situation without discomfort. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco K3 no. 7 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: K3 receiver sensitivity on 50MHz
wayne burdick wrote: I should mention that the operator would be able to turn the K3's regular preamp off when using the external preamp, if desired (and/or turn on the attenuator). Thus there would be a full range of possible NF/dynamic range tradeoffs under convenient operator control. This capability is especially advantageous for 6M work because of the prevalence of sporadic-E propagation on this band. When the E-skip is running hot during a summer contest, propagated signals equaling or even exceeding the strength of local stations are commonplace, and that rather big band can get VERY crowded very quickly. The tremendous strength of these signals is due in large measure to the very efficient nature of sporadic-E ionization. Formed by high-energy wind shear layers, sporadic-E clouds are very planar, and are therefore in general more efficient reflectors than the more loosely structured F2 layer. In addition, they are closer to the Earth, so there is less relative path loss. Finally, 6M antenna systems are oftentimes larger in terms of ERP than a system of equivalent cost on HF. It all adds up to extremely strong signals. But if you live well out into the countryside, away from the man-made RF racket of the towns and cities, 6M can be a very quiet band, much quieter than on 30 MHz and below. (I wish I lived far enough out in the boonies to be able to hear my receiver's noise floor with the antenna connected!) IMO, due to the combined effect of all these factors, 6M arguably demands the highest flexibility in receive dynamic range vs. sensitivity of any amateur band. Bill / W5WVO ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 FIRMWARE UPDATE REQUIRED if you have an Elecraft 2.7 kHz crystal filter
If you have already received your K3, you'll need to update your firmware in order to use our 5-pole, 2.7-kHz crystal filter. Older firmware doesn't set up the correct passband during transmit in SSB modes, and also doesn't allow DSP bandwidth settings below 350 Hz in receive mode. To obtain K3 firmware updates, you'll need our K3 Utility program, which can be found at: http://www.elecraft.com/K3/k3_software.htm Instructions are provided in the program itself. Just click on the Help tab. Even though we'll be announcing all future K3 firmware updates, you may wish to select Check Versions Every 6 Hours in the Firmware panel of the utility program. The program will then notify you automatically if a new revision is available. 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3
To the people who are actually operating K3s on the air, please keep those reports coming on the Elecraft reflector - I'm reading every one of them as I'm considering whether or not I should purchase a K3 - I must admit the report about being able to copy cw as a single signal in crowded conditions sure has peaked my interest! - tnx 72 - Bruce. -ps- of course what's happening to the Cdn dollar is helping too :-)) 72/73 - Bruce ve5rc/ve5qrp - QRP-C#1, QRP-L#886, A1 Operator QRP-Canada - http://www.qrp-canada.com -- I am using the free version of SPAMfighter for private users. It has removed 15766 spam emails to date. Paying users do not have this message in their emails. Get the free SPAMfighter here: http://www.spamfighter.com/len ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 FIRMWARE UPDATE REQUIRED if you have an Elecraft 2.7 kHz crystal filter
I'll need that announcement mail, since I use a Mac to interface to my rig. I have a wintel laptop and will use that for updates, but its only on when it has to be. On 6/11/07 23:26, wayne burdick [EMAIL PROTECTED] sent: If you have already received your K3, you'll need to update your firmware in order to use our 5-pole, 2.7-kHz crystal filter. Older firmware doesn't set up the correct passband during transmit in SSB modes, and also doesn't allow DSP bandwidth settings below 350 Hz in receive mode. To obtain K3 firmware updates, you'll need our K3 Utility program, which can be found at: http://www.elecraft.com/K3/k3_software.htm Instructions are provided in the program itself. Just click on the Help tab. Even though we'll be announcing all future K3 firmware updates, you may wish to select Check Versions Every 6 Hours in the Firmware panel of the utility program. The program will then notify you automatically if a new revision is available. 73, Wayne N6KR -- I think computer viruses should count as life. I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image. - Stephen Hawking ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] mic plug for K2
I just picked up some 2n7000's and RF connects from buxcomm. In a quick search of the web, they were the only ones that had this combination of parts. I lucked out also, in that they are about 150miles from where I live. - David Wilburn [EMAIL PROTECTED] K4DGW K2 S/N 5982 On Tue, 2007-11-06 at 10:09 -0500, Don Wilhelm wrote: Drew, If you have to order on-line, try Buxcomm (www.buxcomm.com). Look for their CBC8 - it is $1.95 and no minimum order. Google for 8 pin microphone connector to find many other sources. 73, Don W3FPR [EMAIL PROTECTED] wrote: Does anyone know where I can get a 8-pin mic plug for the K2? Radio Shack lists it but doesn't seem to have any. Can't find it at Mouser. Thanks. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3: An Observation for Struggling Brass-Pounders
Today I had a few minutes to scan 20 meters with the K3. I heard a slow, hesitant fist calling CQ on 14057, so I grabbed my trusty J-38 hand pump and answered him. We commenced a nice slow QSO at something less than 10 WPM. His fist was perfectly R5 but his spacing was very ragged and uneven. At 10 WPM I had lots of time to 'kill' copying his transmission my head so I punched up CW text decode on the K3, choosing the CW 5-40 (WPM) setting, just to see if it could make sense of his fist. Frankly, I was amazed! The decoder software kept up with the constant changes in speed and spacing well enough that I could have shut off the audio and, while the copy wasn't 100% for every letter, I wouldn't have missed a single thing of importance. Sure, now and again when he'd suddenly send a B as dah...di-di..dit the decoder faithfully printed out T I E, but as his speed shifted all around it very quickly recovered and caught onto whatever new CW rate he was sending at before changing speeds again. He was using a straight key and the relative length of his dots and dashes changed constantly too, but the decoder quickly figured out which was which! Of course the decoder had the help of an adjustable threshold level and the superb K3 filtering that makes puny signals stand out. This is a great feature for anyone who wants to hone their CW skills from the most basic level on the air. As a Novice myself back in '52 who could barely get through a short signal exchange before my arm 'fell off' or my last pencil point broke in my nervous hand I believe that actual on-air experience is the fastest way to build CW confidence and skill. Off-air CW practice is good. After 55 years I still do it regularly, but I hate to see anyone messing about for hours on a practice oscillator, denying themselves the fun of a real QSO, simply because they are afraid they aren't good enough. That's the real value of FISTS (whose frequencies this fellow was hanging out near) and why I'll gladly slow down for a chat with someone brave enough to put a signal on the air. If your copy skills are shaky at best, the decoder will let you QSO with others who are hammering away unsteadily on a straight key even if you can't figure out a single letter in your head. What a 'safety net'! No one learning CW need worry about getting on the air now and not being able to understand the other station! Every time I get a chance to spend a few minutes operating the K3 I rediscover just how quickly using it becomes addictive! Shoot, if these things could be grown in your garden, they'd be illegal! Ron AC7AC ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Rick Tavan's excellent K3 article.
Yes, this kinda threw me too, being used to editing any topic On 6/11/07 20:13, Leigh L Klotz, Jr. [EMAIL PROTECTED] sent: In fact, I couldn't find a single page on the site that was editable, even though I have an account and was logged in. Is this perhaps an oversight? -- If I were not an atheist, I would believe in a God who would choose to save people on the basis of the totality of their lives and not the pattern of their words. I think he would prefer an honest and righteous atheist to a TV preacher whose every word is God, God, God, and whose every deed is foul, foul, foul. -Isaac Asimov, scientist and writer (1920-1992) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
