Re: [Elecraft] k3 - dual receiver & filters
Ralph, You're right: even if the filters don't have matched offsets, you can use diversity mode. But the main and sub synthesizer frequencies will usually be separated by a fraction of a Hz if the offsets are different, leading to a rolling sound in the receivers (phase precessing, a type of beat note). It can be distracting. This is why most users prefer to use matched filters. 73, Wayne N6KR http://www.elecraft.com On Feb 8, 2011, at 10:14 PM, Ralph Parker wrote: >> If you plan to use diversity reception, then the matched filters are > necessary... > > C'mon, guys, this is not true! > I use diversity reception with one .400 8 pole and one .500 5 pole, > sometimes with one .250 8 pole and one .500 5 pole. > Better performance with matched filters = quite likely. > Necessary = not. > > Ralph, VE7XF > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] k3 - dual receiver & filters
>If you plan to use diversity reception, then the matched filters are necessary... C'mon, guys, this is not true! I use diversity reception with one .400 8 pole and one .500 5 pole, sometimes with one .250 8 pole and one .500 5 pole. Better performance with matched filters = quite likely. Necessary = not. Ralph, VE7XF __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] adding 250Hz filer, any improvement?
I found 8 pole 400 Hz and 5 pole 200 Hz as a great combination in last CQ 160m. 400 Hz filter was to wide most of the time. 73 Robert, S57AW Sent from iPhone Na dan 9. feb. 2011, ob 02:30, Wayne Burdick je zapisal: > On the other end of the spectrum: If the going is really tough, you > might consider our 200 Hz, 5-pole filter. It's a favorite of CW and > data-mode operators who routinely have to dig for weak ones between > monster signals in CW and data modes. > > 73, > Wayne > N6KR > > On Feb 8, 2011, at 11:07 AM, Scott Ellington wrote: > >> QRM levels are generally much lower outside EU or NA. Years ago, I >> did a CW contest from ZL with a TS-50 and a single 500 Hz filter. >> That would have been woefully inadequate in NA, but it was fine >> there. So, the question I would ask is whether anyone in a non-EU >> or NA QTH has compared the K3 400 Hz filter with narrower DSP with >> the 250 Hz filter. Surely, the 400 Hz fliter +DSP would be far >> superior to that old TS-50, so I would expect it to be fine. Note >> that the K3 "250 Hz" filter is really about 370 Hz wide, compared to >> 435 for the "400 Hz" one, so the difference isn't that great, anyway. >> >> Perhaps Jorge can check this out in the next contest: Set the "I" >> filter to 400 Hz, and the "II" filter to 250 Hz, both with the 400 >> Hz xtal filter. I'd be interested in the results. >> >> 73, >> >> Scott K9MA >> >> >> >> On Feb 8, 2011, at 11:49 AM, Jorge Diez - CX6VM wrote: >> >>> Hello, >>> >>> >>> >>> I have both KFL3A-400 (400 Hz 8-pole) and KFL3A-1.8K (1.8 kHz 8- >>> pole) >>> filters in my K3. >>> >>> >>> >>> If I add a KFL3A-250 (250 Hz 8-pole) filter I will notice it better >>> to use >>> in contests? Or with the 400Hz is enough? Notice I am not in USA >>> or EU >>> with strong stations near me, I don´t have the QRM this big >>> populations >>> have, trying to reduce the splatters. >>> >>> >>> >>> 73, >>> >>> Jorge >>> >>> CX6VM/CW5W >>> >>> k3 #4077 >> >> Scott Ellington >> Madison, Wisconsin >> USA >> >> >> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] k3 - dual receiver & filters
Tom, Yes and No. If you plan to use diversity reception, then the matched filters are necessary. If you do not plan diversity receive, then they are not important. There is a subtle point here that is not often mentioned. For wider filters, the offset is not as important as for narrow filters. If you have the 5 pole 2.7 kHz filters (for instance), one with an offset of +40 and another with an offset of +20, if you set the offset for both filters at +30, it will be quite usable - only a difference of 10 Hz at a bandwidth of 2700 Hz - it will not be noticable. But do not try the same thing with a filter width of 250 Hz - the results could be quite annoying. I cannot say where the dividing line should be between wide and narrow - a big part of it is in your ability to perceive slight differences. That is the facts as I know them - the choices are yours to make. The safe answer is YES, you need matched filters for diversity receive. 73, Don W3FPR On 2/8/2011 11:25 PM, tom kenville wrote: > I have a single receiver K3, with various filters. > > For adding RCVR#2, do I need to get a set of matched filter pairs to > complete that setup ? > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] k3 - dual receiver & filters
Hi Tom, While matched filters are optimal for matching receiver performance, they're not strictly necessary if you're only doing non-diversity receive. The K3 will select an appropriate filter bandwidth for each receiver independently. If you want to do diversity receive, you'll need filters with matched offsets. Our 8-pole filters all have offsets of 0.00, but can also do this with 5-pole filters as long as the offsets are matched for a given crystal filter bandwidth. At the time you order the filters, you can request matched sets. 73, Wayne N6KR On Feb 8, 2011, at 8:25 PM, tom kenville wrote: > I have a single receiver K3, with various filters. > > For adding RCVR#2, do I need to get a set of matched filter pairs to > complete that setup ? > > -- > thanks and 73 > Tom Kenville -- W6TJK > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] k3 - dual receiver & filters
I have a single receiver K3, with various filters. For adding RCVR#2, do I need to get a set of matched filter pairs to complete that setup ? -- thanks and 73 Tom Kenville -- W6TJK __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 wanted
I am interested in purchasing a used K3. I will consider various options. 73 Barney K3LA -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-wanted-tp6006409p6006409.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] adding 250Hz filer, any improvement?
The waterfall in CW Skimmer is extremely accurate for that sort of thing. Whether you mouse click on a "decoder" (station) or use the Up/Down arrow keys to jump from one to the next, the zero beat is very, very accurate. So much so that when I was using CW Skimmer in 3 KHz audio mode simply to step through stations (using the arrow keys) for S&P on VFO B, it was actually too good ... the tone for each station I stepped through was always identical, making it sometimes difficult to recognize that I had actually QSY'd. The decoders in CW Skimmer home in VERY tightly. 73, Dave AB7E On 2/8/2011 7:12 PM, Bill W4ZV wrote: > I use a waterfall when doing S&P so it was very easy to jump to stations > using the 200 Hz filter. I believe as more guys begin using waterfalls they > will do a better job of zero beating stations running. > 73, Bill > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] FILTER SETTINGS
I should have mentioned that the 500 Hz Joe measured below was the Elecraft 5-pole...not the Inrad 8-pole. 73, Bill Joe Subich, W4TV wrote: > > > 200 250 400 500 >- > - 6dB 224 370 435 565 Hz > -60dB 896 777 913 1751 Hz > slope 6.22 3.774.4310.98 Hz/dB > > -10dB 274 400 470 653 Hz > -20dB 398 475 559 873 Hz > -30dB 522 550 647 1092 Hz > -40dB 647 626 736 1312 Hz > -50dB 771 702 825 1531 Hz > -- View this message in context: http://elecraft.365791.n2.nabble.com/FILTER-SETTINGS-tp456756p6006280.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] adding 250Hz filer, any improvement?
wayne burdick wrote: > > On the other end of the spectrum: If the going is really tough, you > might consider our 200 Hz, 5-pole filter. It's a favorite of CW and > data-mode operators who routinely have to dig for weak ones between > monster signals in CW and data modes. > I operated most of the CQ 160 (a very crowded contest with a mixture of big NA signals and weak DX signals) using a 200 Hz set to activate at WIDTH 350. This makes the XFIL/DSP cascaded curve closer to that of the 200 only. Joe W4TV provided the following a few years ago: 200 250 400 500 - - 6dB 224 370 435 565 Hz -60dB 896 777 913 1751 Hz slope 6.22 3.774.4310.98 Hz/dB -10dB 274 400 470 653 Hz -20dB 398 475 559 873 Hz -30dB 522 550 647 1092 Hz -40dB 647 626 736 1312 Hz -50dB 771 702 825 1531 Hz http://elecraft.365791.n2.nabble.com/FILTER-SETTINGS-td456756.html#a456757 With the XFIL = 200 and DSP = 350, the resulting filter is probably -15 dB at ~300 Hz, which still allows you to still hear what's going on around you. Most EU stations would call zero beat since they are accustomed to extremely tight spacings but many NA stations were off frequency. Sandwiched between two EU stations about 250 Hz on either side, a major problem was when NA stations called them on my run frequency! I use a waterfall when doing S&P so it was very easy to jump to stations using the 200 Hz filter. I believe as more guys begin using waterfalls they will do a better job of zero beating stations running. One problem I ran into was my KRX3 only had an Inrad 500 Hz 8-pole which was definitely too wide with many strong stations were nearby. I had to turn diversity off several few times when the KRX3 was allowing too much QRM. I fixed that last week by adding another 200 Hz to the KRX3! 73, Bill -- View this message in context: http://elecraft.365791.n2.nabble.com/adding-250Hz-filer-any-improvement-tp6004879p6006268.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] adding 250Hz filer, any improvement?
On the other end of the spectrum: If the going is really tough, you might consider our 200 Hz, 5-pole filter. It's a favorite of CW and data-mode operators who routinely have to dig for weak ones between monster signals in CW and data modes. 73, Wayne N6KR On Feb 8, 2011, at 11:07 AM, Scott Ellington wrote: > QRM levels are generally much lower outside EU or NA. Years ago, I > did a CW contest from ZL with a TS-50 and a single 500 Hz filter. > That would have been woefully inadequate in NA, but it was fine > there. So, the question I would ask is whether anyone in a non-EU > or NA QTH has compared the K3 400 Hz filter with narrower DSP with > the 250 Hz filter. Surely, the 400 Hz fliter +DSP would be far > superior to that old TS-50, so I would expect it to be fine. Note > that the K3 "250 Hz" filter is really about 370 Hz wide, compared to > 435 for the "400 Hz" one, so the difference isn't that great, anyway. > > Perhaps Jorge can check this out in the next contest: Set the "I" > filter to 400 Hz, and the "II" filter to 250 Hz, both with the 400 > Hz xtal filter. I'd be interested in the results. > > 73, > > Scott K9MA > > > > On Feb 8, 2011, at 11:49 AM, Jorge Diez - CX6VM wrote: > >> Hello, >> >> >> >> I have both KFL3A-400 (400 Hz 8-pole) and KFL3A-1.8K (1.8 kHz 8- >> pole) >> filters in my K3. >> >> >> >> If I add a KFL3A-250 (250 Hz 8-pole) filter I will notice it better >> to use >> in contests? Or with the 400Hz is enough? Notice I am not in USA >> or EU >> with strong stations near me, I don´t have the QRM this big >> populations >> have, trying to reduce the splatters. >> >> >> >> 73, >> >> Jorge >> >> CX6VM/CW5W >> >> k3 #4077 > > Scott Ellington > Madison, Wisconsin > USA > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 & P3 in a pileup/Split using SUB RX
Oops! I missed that. Mike On 2/8/2011 7:30 PM, Jim Sheldon wrote: > That's on the K3's LCD display. I was talking about the P3 - totally > different ball > game. Maybe I wasn't clear enough. The cursor and marker I'm talking about > is on > the P3 scope's display. > Jim - W0EB > > > My display has "TX" between the VFO symbols, with an arrow pointing > > at the active > > xmit VFO, but I don't have the second receiver. Is it different? > > > > 73, Mike NF4L > > > > On 2/8/2011 2:15 PM, John Chappell G3XRJ wrote: > >> APF is available on SUB by A>B ALL or by B Set. > >> > >> What I'd like to see is the 'Active' TX VFO cursor marked in some > >> way - > >> by different colour or whatever. > >> > >> John G3XRJ > >> > >> > >>> I had wondered that myself John, so I just checked it. It > >>> responds to the Main receiver. Also, APF only works on the > >>> Main so that's real handy. > >>> > >>> Jim > >>> > >>> > >> __ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:Elecraft@mailman.qth.net > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: > >> http://www.qsl.net/donate.html > > > > > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 & P3 in a pileup/Split using SUB RX
That's on the K3's LCD display. I was talking about the P3 - totally different ball game. Maybe I wasn't clear enough. The cursor and marker I'm talking about is on the P3 scope's display. Jim - W0EB > My display has "TX" between the VFO symbols, with an arrow pointing > at the active > xmit VFO, but I don't have the second receiver. Is it different? > > 73, Mike NF4L > > On 2/8/2011 2:15 PM, John Chappell G3XRJ wrote: >> APF is available on SUB by A>B ALL or by B Set. >> >> What I'd like to see is the 'Active' TX VFO cursor marked in some >> way - >> by different colour or whatever. >> >> John G3XRJ >> >> >>> I had wondered that myself John, so I just checked it. It >>> responds to the Main receiver. Also, APF only works on the >>> Main so that's real handy. >>> >>> Jim >>> >>> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: >> http://www.qsl.net/donate.html > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] LCD TV Causing RFI
On 2/8/2011 12:20 PM, Guy Olinger K2AV wrote: > That is to say that a pair of three turn suppressors is worth 18, and > a single five turn is 25, all else held equal. Another important point. With any ferrite used for suppression, RESONANCE is the SWEET spot, and any ferrite that's GOOD for suppression will yield a VERY low circuit Q. Values on the order of 0.5 are typical for Fair-Rite #31 and #43. That means the resonance will be VERY broad (typically covering a frequency ratio of 3:1 or 4:1 for decent suppression, and up to 8:1 for #31 below 5 MHz). 73, Jim Brown K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Taken the plunge!
Ed, Be especially vigilant about screw type/lengths during assembly. Some are very similar. Otherwise you will discover later during the assembly that the wrong screws were used on something and you have to go back and make the correction. Ask me how I know this, hi,hi. Congratulations on your new K3 ! 73, Bob K6UJ On Feb 8, 2011, at 11:21 AM, EMD wrote: > > Elecrafters, > > Okay K2 #7109 was delivered today. I'm going to take my time and follow as > best I can all the excellent advice I have received from many of you on the > reflector, starting with a parts inventory. > > I was thinking of using the little plastic left over containers that I have > been saving. I'm dealing with limited space so that way I can stack them > and keep them sealed when not using that particular parts group. > > So I'm ready to get started. > > 73, Ed > KE7HGA > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/Taken-the-plunge-tp5974140p6005190.html > Sent from the [OT] mailing list archive at Nabble.com. > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 & P3 in a pileup/Split using SUB RX
My display has "TX" between the VFO symbols, with an arrow pointing at the active xmit VFO, but I don't have the second receiver. Is it different? 73, Mike NF4L On 2/8/2011 2:15 PM, John Chappell G3XRJ wrote: > APF is available on SUB by A>B ALL or by B Set. > > What I'd like to see is the 'Active' TX VFO cursor marked in some way - > by different colour or whatever. > > John G3XRJ > > > > >> I had wondered that myself John, so I just checked it. It responds to the >> Main receiver. Also, APF only works on the Main so that's real handy. >> >> Jim >> >> >> > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 Kit Questions
A really wide setting is useful when scanning a "dead" CW band. Rather than tune very slowly, it tune at a moderate pace with a very wide setting. When the signal is weak, it's the changing tone as I tune that alerts me someone is "in there". Ron AC7AC -Original Message- Don, I still use a fairly wide filter (1 KHz to 1.5 KHz) on my K3 when I am hunting for CW signals or listening to broad activity. I have the P3 also that helps out a bit but I usually do not close down my filter until I establish contact and have narrowed down to the other operator. Then I will typically narrow down to about 350 Hz unless there is heavy activity causing QRM and then I will go even further. If I do my hunt activity with a narrow filter I sometimes go over stations without even hearing them at all. Although the P3 does help here, often there are stations that do not really register that high on the P3 to be easily visible with just a glance. I agree that 2.4 KHz is too wide for CW but then I am not that familiar with the filters that are available and I so I am not sure whether the SSB is necessary or not. I only pointed out that it was something that I had heard someone else doing. phil, K7PEH On Feb 8, 2011, at 8:44 AM, Don Wilhelm wrote: > Phil, > > For me, that is an awfully wide filter for CW. I normally tune CW with a filter set to 700 Hz. a 2.4kHz wide filter hears a lot more of the band - too much for me. > > OTOH, there are some operators who like to use a wide filter to hear a lot of what is going on around their frequency. If you are in that class and have a good "filter between the ears", then by all means use it that way. > > I might point out one other disadvantage of using the wide filter for CW. If a strong signal is on the band say 1500 Hz away from the weaker signal you are trying to copy, your mind may be able to easily separate the two, but that strong signal is also activating the AGC and all signals in the passband will be reduced in strength because of it. That is why narrow "roofing filters" are offered for the K3 - even though the DSP can create a narrow filter, the hardware AGC is still responding to the strongest signal in the passband. The same argument applies to the K2. > > 73, > Don W3FPR > > On 2/8/2011 10:39 AM, Phil Hystad wrote: >> A possible follow-up question --- one recommendation I received (indirectly out of band from this group) was that the SSB option was useful for the wider filter even if you do not plan to do SSB. I have yet to read through all of the K2 manual (my next project) so I don't know much about the filters on the K2 so far. >> >> 73, phil, K7PEH >> __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Sub Rx listening option
Thanks Don, that sounds like a very good option. Cheers! Julius Julius Fazekas N2WN Tennessee Contest Group http://k4tcg.org/ http://groups.google.com/group/tcg1?hl=en Tennessee QSO Party http://www.tnqp.org/ Elecraft K2 #4455 Elecraft K3/100 #366 Elecraft K3/100 #1875 --- On Tue, 2/8/11, Don Wilhelm wrote: From: Don Wilhelm Subject: Re: [Elecraft] Sub Rx listening option To: "Julius Fazekas n2wn" Cc: elecraft@mailman.qth.net Date: Tuesday, February 8, 2011, 3:49 PM Julius, If it were mine, I would put a DPDT switch in line with the audio leads so you can switch instantly between the two and see which is better for any one time. 73, Don W3FPR On 2/8/2011 3:30 PM, Julius Fazekas n2wn wrote: > Thanks all who responded... > > turning the phones around is an option, but not a very good one for the set > in question. > > Looks like a swap over connector would be the best option in my case. > > This is more of a special case scenario, versus day to day or even contest > work. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 Kit Questions
Phil, The K2 variable filter can be set for any width that you desire It is a 5 crystal Cohn filter whose design width is about 400 Hz. The CW filter width defaults are 1.50 kHz, 700 Hz, 400 Hz and 100 Hz, but there is no reason you have to stay with the defaults. There are 4 CW filter widths that can be chosen. There are also 4 widths for the SSB filter set and 4 for the RTTY filter set. The variable filter is pretty flat out to about 1.6 or 1.7 kHz, but then it begins to get a bit "ragged" - still it is quite usable for SSB reception, but I would not want to see a SSB signal transmitted through it - that is where the 2.4 kHz SSB filter on the KSB2 board comes in. It is a fixed width and has 7 crystals. 73, Don W3FPR On 2/8/2011 4:48 PM, Phil Hystad wrote: > Don, > > I still use a fairly wide filter (1 KHz to 1.5 KHz) on my K3 when I am > hunting for CW signals or listening to broad activity. I have the P3 also > that helps out a bit but I usually do not close down my filter until I > establish contact and have narrowed down to the other operator. Then I will > typically narrow down to about 350 Hz unless there is heavy activity causing > QRM and then I will go even further. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 Kit Questions
Don, I still use a fairly wide filter (1 KHz to 1.5 KHz) on my K3 when I am hunting for CW signals or listening to broad activity. I have the P3 also that helps out a bit but I usually do not close down my filter until I establish contact and have narrowed down to the other operator. Then I will typically narrow down to about 350 Hz unless there is heavy activity causing QRM and then I will go even further. If I do my hunt activity with a narrow filter I sometimes go over stations without even hearing them at all. Although the P3 does help here, often there are stations that do not really register that high on the P3 to be easily visible with just a glance. I agree that 2.4 KHz is too wide for CW but then I am not that familiar with the filters that are available and I so I am not sure whether the SSB is necessary or not. I only pointed out that it was something that I had heard someone else doing. phil, K7PEH On Feb 8, 2011, at 8:44 AM, Don Wilhelm wrote: > Phil, > > For me, that is an awfully wide filter for CW. I normally tune CW with a > filter set to 700 Hz. a 2.4kHz wide filter hears a lot more of the band - > too much for me. > > OTOH, there are some operators who like to use a wide filter to hear a lot of > what is going on around their frequency. If you are in that class and have a > good "filter between the ears", then by all means use it that way. > > I might point out one other disadvantage of using the wide filter for CW. If > a strong signal is on the band say 1500 Hz away from the weaker signal you > are trying to copy, your mind may be able to easily separate the two, but > that strong signal is also activating the AGC and all signals in the passband > will be reduced in strength because of it. That is why narrow "roofing > filters" are offered for the K3 - even though the DSP can create a narrow > filter, the hardware AGC is still responding to the strongest signal in the > passband. The same argument applies to the K2. > > 73, > Don W3FPR > > On 2/8/2011 10:39 AM, Phil Hystad wrote: >> A possible follow-up question --- one recommendation I received (indirectly >> out of band from this group) was that the SSB option was useful for the >> wider filter even if you do not plan to do SSB. I have yet to read through >> all of the K2 manual (my next project) so I don't know much about the >> filters on the K2 so far. >> >> 73, phil, K7PEH >> __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Sub Rx listening option
I think if you dig into the reflector archives you can find information on how to control the routing of the K3 audio to each headphone/speaker using direct DSP commands. The information came from Lyle and others and would be dated prior to the firmware release that added the capability to the K3 menu. The settings don't survive power down, but if you only intended to use them in isolated instances that probably wouldn't matter much and would save you the hassle of building a swap over connector (admittedly not a big deal). 73, Dave AB7E On 2/8/2011 1:30 PM, Julius Fazekas n2wn wrote: > Thanks all who responded... > > turning the phones around is an option, but not a very good one for the set > in question. > > Looks like a swap over connector would be the best option in my case. > > This is more of a special case scenario, versus day to day or even contest > work. > > Cheers, > Julius > n2wn > > - > Julius Fazekas > N2WN > > Tennessee Contest Group > http://www.k4ro.net/tcg/index.html > > Tennessee QSO Party > http://www.tnqp.org/ > > Elecraft K2#4455 > Elecraft K3/100 #366 > Elecraft K3/100 #1875 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Sub Rx listening option
Julius, If it were mine, I would put a DPDT switch in line with the audio leads so you can switch instantly between the two and see which is better for any one time. 73, Don W3FPR On 2/8/2011 3:30 PM, Julius Fazekas n2wn wrote: > Thanks all who responded... > > turning the phones around is an option, but not a very good one for the set > in question. > > Looks like a swap over connector would be the best option in my case. > > This is more of a special case scenario, versus day to day or even contest > work. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 Kit Questions
Hi Phil, I am exclusively a QRP CW guy. I put the KAF2 audio filter in my K2. It works great but I have only used it a couple of times. (I've had it for about 7 or 8 months.) The regular audio filter settings on the stock radio do a very good job for casual operating. The K2 is a lot of fun to build and operate. You will enjoy it. 73, Paul - N8XMS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Taken the plunge!
Ed, Congratulations, and enjoy building it. Follow the instructions "to the letter" and do a good job of soldering -- it will work and serve you well. Be aware that many plastics can gather static charges, so don't put active devices (ICs, transistors, diodes, etc) in them - if the part is shipped in black foam or the transistors in an anti-static bag (the pink ones), leave it there until you are ready to use it. - Alternately, you can remove the socket from the black foam and use the space to stick the transistors into the foam. 73, Don W3FPR On 2/8/2011 2:21 PM, EMD wrote: > Elecrafters, > > Okay K2 #7109 was delivered today. I'm going to take my time and follow as > best I can all the excellent advice I have received from many of you on the > reflector, starting with a parts inventory. > > I was thinking of using the little plastic left over containers that I have > been saving. I'm dealing with limited space so that way I can stack them > and keep them sealed when not using that particular parts group. > > So I'm ready to get started. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Sub Rx listening option
Thanks all who responded... turning the phones around is an option, but not a very good one for the set in question. Looks like a swap over connector would be the best option in my case. This is more of a special case scenario, versus day to day or even contest work. Cheers, Julius n2wn - Julius Fazekas N2WN Tennessee Contest Group http://www.k4ro.net/tcg/index.html Tennessee QSO Party http://www.tnqp.org/ Elecraft K2#4455 Elecraft K3/100 #366 Elecraft K3/100 #1875 -- View this message in context: http://elecraft.365791.n2.nabble.com/Sub-Rx-listening-option-tp6004816p6005387.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] LCD TV Causing RFI
Skimping on suppression core cost is fully eschewed. Don't go there, spend the bucks, get the right stuff. The suppression below self resonance increases with the SQUARE of the turns through the center. That is to say that a pair of three turn suppressors is worth 18, and a single five turn is 25, all else held equal. Even if the five turn core costs DOUBLE the three turn job, it's STILL cheaper bang for the buck. And if you just HAVE to use two cores to feel good, it's 50 vs 18. LEARN the stuff on Jim's web page. Save yourselves grief and financial mismanagement. 73, Guy. On Tue, Feb 8, 2011 at 1:11 PM, Jim Brown wrote: > On 2/8/2011 7:30 AM, Brian - N5BCN wrote: > > FYI, a follow up to my RFI hunting adventure: > > > > I ordered a bunch of ferrite cores from Mouser, Part #623-0431176451, at > > about $7.00 each. They have a 0.72 inch inner diameter. > > > > The offending HDMI cables are fairly thick; I could only manage two > complete > > turns and still be able to snap the core shut. Three turns and I had to > > zip-tie the core shut. > > That's why I recommend the larger 1-in i.d. clamp-on. They cost more, > but you could have solved your problem with one core having more turns. > > The cores helped immensely. I achieved the best results with one core > with > > three turns and a second core added to the cable with two turns, both on > the > > DVR end of the cable. The RFI has been abated about 95%. > > > > Question: does the tightest of the coils going through the core have any > > affect on the impedance? > > Not enough to matter. What WOULD help in your application would be to > bunch the turns tightly together so that there is more capacitance > between turns, which would lower the resonant frequency. The reason > that you needed two cores is that the resonant frequency of your chokes > is far too high. Study http://audiosystemsgroup.com/RFI-Ham.pdf to > understand this. > > 73, Jim Brown K9YC > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] p3 Tap to QSY in Data A mode
Jim, I don't have a P3, so cannot comment directly on that aspect, but there seems to be some confusion between DATA A and AFSK A in your latest e-mail, which may obscure your message. The mode normally used for PSK and other sound card digital modes is DATA A. DATA A is an upper sideband mode, and the K3's dial reads the suppressed carrier (BFO) frequency, exactly the same as in USB mode. The centre of the filter passband in DATA A is 1500 Hz above the dial frequency (1500 Hz below in DATA A-REV). If you were referring to DATA A, not AFSK A, your comment about a 1500 Hz offset needed for clicking and tuning to a narrow-band signal like PSK31 could be apropos, i.e. ideally, clicking on a PSK signal trace in the waterfall when the radio was in DATA A mode would tune the radio to a dial frequency that was 1500 Hz below the actual frequency of the signal being clicked on. AFSK A is different from DATA A. In AFSK A and FSK D, the K3's dial frequency displays the RTTY Mark frequency, which is set by the PITCH setting to one of four possible offsets below the suppressed carrier: 915 Hz, 1275 Hz, 1445 Hz or 2125 Hz. The centre of the filter passband in AFSK A is 85 Hz below the K3's dial frequency. If the intent is to tune to an RTTY signal by clicking on the upper (mark) trace in the waterfall, no offset is needed; if the intent is to tune to the signal by clicking halfway between the mark and space traces, then an 85 Hz offset would be needed, i.e. the K3 should be tuned 85 Hz above the actual frequency that was clicked on in order to centre the signal in the passband. 73, Rich VE3KI M0CKE wrote: > Not in PSK D mode as we were running PSK65 so in AFSK A mode > > So if it has an offset programmed in for PSK D mode then maybe AFSK A mode > has been an oversight > > Anyone at Elecraft care to comment, I think AFSK A mode needs an offset of > 1500hz in the P3 so you click and tune to the centre of the pass band, as > per CW, and PSK D mode. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Diversity in CQ 160 contest [updated]
I was asked to post this on the Elecraft reflector. You may have seen it on TopBand. I have modified some of the earlier text for clarity and added commentary. -- The just past CQ 160 was my first 160 contest using diversity (K3) and an RX antenna. Using an extension of some successful experiences with BOG arrays I designed for W0UCE, I used a pair of balanced, ungrounded electrical fullwave Loops-On-Ground phased for the NE (LOG array ? :>)), and my TX antenna (3/8 wave endfed L). I was (and remain) somewhat stunned by the degree that the noise from BOTH TX and RX antennas is spread around the "audio horizon" in diversity, while the CW (from either or both antennas) remains discrete in some "direction" on the audio horizon even if that one direction varies a lot. I have a few persistent weak birdies which are convenient for s/n comparison, which prove that directional discrimination IS in effect. My favorite one at 1816.67, daytime, shows a steady and persistent 13 dB improvement in s/n on the LOGs over the L on Spectrogram. My RX to EU has gone from my being afraid to call CQ QRO because of simply not hearing people calling me on the TX endfed L, to being as sensitive or more sensitive as anyone in the area lacking W8JI/W4ZV/W3LPL style beverage arrays. The real (and unexplained) bonus is what using RX + TX antennas under diversity has done for hearing off the TX antenna. Case in point, VP8ORK. They were not copiable on either separately, STRONGER in the noise on the TX vs the LOGs. With diversity VP8ORK was well in the clear, as if some broad noise cancellation was in effect. Certainly more than I had expected, going from a 229 on EITHER ear separately to a very clearly heard 549 on BOTH in diversity. Since all the noise cancellation is going on in my BRAIN, not in electronics, to be able to hear it that way was quite the surprise. To be complete, the night was unusually clear of QRN (will we ever have quiet winters again?) and it was the more "hissy" kind of 160 ambient noise controlling. This clarity was also in effect for the CQ 160. I was running 100 watts (a long story) SOLP for the contest. At one point a UT5 came on my run frequency with his run, up about 80 Hz. I was able to hear him well for over two hours, but doubt I bothered him running the K3 barefoot. About half the time I could clearly hear the stations calling him. The diversity and 80 Hz clearly separated stations from the US calling me and stations from EU calling him, making his presence on the frequency a non-issue. This would have been a maddening distraction listening without diversity, and loss of my run frequency. The root of diversity's extraordinary ability to spread the noise in my head seems to be a qualitative difference between the noise on the two. Just to the ear, the LOG noise is more hissy and missing a "harshness" in the noise on the L. The LOG does reject the buzzy stuff from the south on the L that I hear during the day, but that buzz seems to be covered by the nighttime ambient noise on the L, so the buzz would not seem to control the noise at night on the L. But the difference in the "harshness" remains at night. In any event, the difference between the two creates a perceived spatial spread that vastly improves a discreet CQ signal on the L, even one that is poorly heard on the NE phased LOGs. (Remember that we are talking about a process in my brain, not electronics and firmware.) To this point all the talk on RX antennas typically has to do with brute force improvement of signal to noise in a single signal stream, and I do not question the results at stations the likes of W8JI, W4ZV, W3LPL et al. But these power plants are not feasible at most QTH. I am wondering if diversity RX can improve urban reception significantly with a single on ground RX antenna whose MAIN purpose is to provide "anti-noise" for brain-based diversity spread of noise in a diversity RX, any directional improvement in same appreciated, but not the essential reason for laying out the antenna. I have the severe feeling (unproven) that Ground Low Velocity Factor (GLVF) antennas, being down on the ground, are hiding "under the radar" of immediately local noise, with the very lowest incoming angles attenuated by ground and pattern. This gives the ears, roughly, a choice between higher angle non-local noise vs. higher angle non-local noise PLUS local noise. My brain spreads these two out and leaves the discrete CW as an audio "point source". The other phenomenon of hearing through antenna-specific fades was still in effect, extremely useful, but not the strongest advantage of the combination. If the reason for the spread IS the "under the radar" effect, this will be an advantage to GLVF devices not shared by pennants, flags, K9AY and other above ground RX antennas whose essential advantage is discrimination by pattern. This is NOT a tested and confirmed conjecture. The audio noise spread
Re: [Elecraft] p3 Tap to QSY in Data A mode
Hi Jim, AFSK A mode on the K3 assumes you are running FSK. The VFO frequency is the frequency of the mark tone, which is 170 Hz / 2 = 85 Hz from the center of the filter passband. Alan N1AL On Tue, 2011-02-08 at 19:23 +, Jim Balls wrote: > Hi Alan > > Not in PSK D mode as we were running PSK65 so in AFSK A mode > > So if it has an offset programmed in for PSK D mode then maybe AFSK A mode > has been an oversight > > Anyone at Elecraft care to comment, I think AFSK A mode needs an offset of > 1500hz in the P3 so you click and tune to the centre of the pass band, as > per CW, and PSK D mode. > > Jim M0CKE > > -Original Message- > From: Alan Bloom > Sent: Monday, February 07, 2011 6:46 PM > To: James Balls > Cc: elecraft@mailman.qth.net > Subject: Re: [Elecraft] p3 Tap to QSY in Data A mode > > Hi Jim, > > I'm not seeing the problem. With the K3 set up for PSK D data mode and > normalized bandwidth and offset, if I click-to-QSY on a carrier with the > P3, the carrier ends up right in the center of the K3 passband. > > Could you tell me exactly how you have the K3 and P3 set up? What > versions of K3/P3 firmware are you running? > > Thanks, > > Alan N1AL > > > On Mon, 2011-02-07 at 11:28 +, James Balls wrote: > > Anyone ?? > > > > No replies on this ? > > > > > From: makid...@hotmail.co.uk > > > To: elecraft@mailman.qth.net > > > Date: Sat, 5 Feb 2011 11:57:34 + > > > Subject: [Elecraft] p3 Tap to QSY in Data A mode > > > > > > All > > > > > > Just setting up for PSK contest and notice that the tap to QSO is not > > > accurate, ie if I tap to qsy to the scope peak for a PSK signal with the > > > filters narrow to say 0.2 the signal it well outside the filter pass > > > band > > > > > > Is there any way of changing this so the signal arrives in the passband > > > in DATA A mode? > > > > > > Thanks > > > > > > Jim M0CKE > > > __ > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 - KAF versus DSP
I had planned to add the KAF2 after building my K2 in 2000. Then I happened to hear a K2 with one installed and was not impressed. Later it dawned on me why: my high-frequency hearing is already compromised, thanks to spending a lot of time firing weapons in the military (soldiers don't wear ear protectors). I had a "built in" filter to attenuate high frequencies, Hi! Later I had a chance to work with the Elecraft AF1 "mini-module" outboard audio filter. The AF1 includes an analog low pass filter with a variable cut-off point to attenuate the higher frequencies, and it has a separate, analog, active, tunable "peaking" filter. I use that frequently with the K2. The active "peaking" filter in the AF1 does the same thing as the APF in the K3, frequently pulling signals near or below the noise level up into the clear. Indeed, using them side by side it's hard to tell performance of the AF1 peaking filter apart from the APF. I guess that's a complement to the APF, since the APF strives to replicate in DSP a filter like the AF1 peaking filter. The AF1 is an extra little box on the operating table but I find it a valuable addition to the K2 for copying CW. Ron AC7AC -Original Message- The KAF2 has a very nice low pass filter in it. It removes essentially all hiss, and just sounds nice. I don't find the rest of the filter to be very effective. The DSP is very effective, but lacks the hiss reducing low pass filter. There is a solution to this. Think about it. I built the KAF2 low pass filter onto my DSP board. Best of both worlds. 73, Fred - kt5x K2 # 0700 K3 # 0144 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Taken the plunge!
Elecrafters, Okay K2 #7109 was delivered today. I'm going to take my time and follow as best I can all the excellent advice I have received from many of you on the reflector, starting with a parts inventory. I was thinking of using the little plastic left over containers that I have been saving. I'm dealing with limited space so that way I can stack them and keep them sealed when not using that particular parts group. So I'm ready to get started. 73, Ed KE7HGA -- View this message in context: http://elecraft.365791.n2.nabble.com/Taken-the-plunge-tp5974140p6005190.html Sent from the [OT] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] p3 Tap to QSY in Data A mode
Hi Alan Not in PSK D mode as we were running PSK65 so in AFSK A mode So if it has an offset programmed in for PSK D mode then maybe AFSK A mode has been an oversight Anyone at Elecraft care to comment, I think AFSK A mode needs an offset of 1500hz in the P3 so you click and tune to the centre of the pass band, as per CW, and PSK D mode. Jim M0CKE -Original Message- From: Alan Bloom Sent: Monday, February 07, 2011 6:46 PM To: James Balls Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] p3 Tap to QSY in Data A mode Hi Jim, I'm not seeing the problem. With the K3 set up for PSK D data mode and normalized bandwidth and offset, if I click-to-QSY on a carrier with the P3, the carrier ends up right in the center of the K3 passband. Could you tell me exactly how you have the K3 and P3 set up? What versions of K3/P3 firmware are you running? Thanks, Alan N1AL On Mon, 2011-02-07 at 11:28 +, James Balls wrote: > Anyone ?? > > No replies on this ? > > > From: makid...@hotmail.co.uk > > To: elecraft@mailman.qth.net > > Date: Sat, 5 Feb 2011 11:57:34 + > > Subject: [Elecraft] p3 Tap to QSY in Data A mode > > > > All > > > > Just setting up for PSK contest and notice that the tap to QSO is not > > accurate, ie if I tap to qsy to the scope peak for a PSK signal with the > > filters narrow to say 0.2 the signal it well outside the filter pass > > band > > > > Is there any way of changing this so the signal arrives in the passband > > in DATA A mode? > > > > Thanks > > > > Jim M0CKE > > __ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] adding 250Hz filer, any improvement?
I had both filters installed for a while. They both work equally well. The 250 produces a beautifully symmetrical, optimal width, spectral plot on the MMTTY FFT display for RTTY, so I decided to standardize on that filter, and sold the 400. Now I have 250's in both of my K3's. I told the K3's that the filters were 400's, so they switch in at that dsp bandwidth. Dave Hachadorian, K6LL Yuma, AZ -Original Message- From: Scott Ellington Sent: Tuesday, February 08, 2011 12:07 PM To: Elecraft Reflector Subject: Re: [Elecraft] adding 250Hz filer, any improvement? QRM levels are generally much lower outside EU or NA. Years ago, I did a CW contest from ZL with a TS-50 and a single 500 Hz filter. That would have been woefully inadequate in NA, but it was fine there. So, the question I would ask is whether anyone in a non-EU or NA QTH has compared the K3 400 Hz filter with narrower DSP with the 250 Hz filter. Surely, the 400 Hz fliter +DSP would be far superior to that old TS-50, so I would expect it to be fine. Note that the K3 "250 Hz" filter is really about 370 Hz wide, compared to 435 for the "400 Hz" one, so the difference isn't that great, anyway. Perhaps Jorge can check this out in the next contest: Set the "I" filter to 400 Hz, and the "II" filter to 250 Hz, both with the 400 Hz xtal filter. I'd be interested in the results. 73, Scott K9MA On Feb 8, 2011, at 11:49 AM, Jorge Diez - CX6VM wrote: > Hello, > > > > I have both KFL3A-400 (400 Hz 8-pole) and KFL3A-1.8K (1.8 kHz 8-pole) > filters in my K3. > > > > If I add a KFL3A-250 (250 Hz 8-pole) filter I will notice it better to > use > in contests? Or with the 400Hz is enough? Notice I am not in USA or EU > with strong stations near me, I don´t have the QRM this big populations > have, trying to reduce the splatters. > > > > 73, > > Jorge > > CX6VM/CW5W > > k3 #4077 Scott Ellington Madison, Wisconsin USA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 & P3 in a pileup/Split using SUB RX
APF is available on SUB by A>B ALL or by B Set. What I'd like to see is the 'Active' TX VFO cursor marked in some way - by different colour or whatever. John G3XRJ > I had wondered that myself John, so I just checked it. It responds to the > Main receiver. Also, APF only works on the Main so that's real handy. > > Jim > > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] adding 250Hz filer, any improvement?
QRM levels are generally much lower outside EU or NA. Years ago, I did a CW contest from ZL with a TS-50 and a single 500 Hz filter. That would have been woefully inadequate in NA, but it was fine there. So, the question I would ask is whether anyone in a non-EU or NA QTH has compared the K3 400 Hz filter with narrower DSP with the 250 Hz filter. Surely, the 400 Hz fliter +DSP would be far superior to that old TS-50, so I would expect it to be fine. Note that the K3 "250 Hz" filter is really about 370 Hz wide, compared to 435 for the "400 Hz" one, so the difference isn't that great, anyway. Perhaps Jorge can check this out in the next contest: Set the "I" filter to 400 Hz, and the "II" filter to 250 Hz, both with the 400 Hz xtal filter. I'd be interested in the results. 73, Scott K9MA On Feb 8, 2011, at 11:49 AM, Jorge Diez - CX6VM wrote: > Hello, > > > > I have both KFL3A-400 (400 Hz 8-pole) and KFL3A-1.8K (1.8 kHz 8-pole) > filters in my K3. > > > > If I add a KFL3A-250 (250 Hz 8-pole) filter I will notice it better to use > in contests? Or with the 400Hz is enough? Notice I am not in USA or EU > with strong stations near me, I don´t have the QRM this big populations > have, trying to reduce the splatters. > > > > 73, > > Jorge > > CX6VM/CW5W > > k3 #4077 Scott Ellington Madison, Wisconsin USA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 - KAF versus DSP
The KAF2 has a very nice low pass filter in it. It removes essentially all hiss, and just sounds nice. I don't find the rest of the filter to be very effective. The DSP is very effective, but lacks the hiss reducing low pass filter. There is a solution to this. Think about it. I built the KAF2 low pass filter onto my DSP board. Best of both worlds. 73, Fred - kt5x K2 # 0700 K3 # 0144 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Sub Rx listening option
Julius, If using headphones I just turn the headphones around. The Heil's can be worn either way. The only draw back is the microphone swings out only in one direction, but for just listening, not a problem. 73, Bob K6UJ On Feb 8, 2011, at 9:35 AM, Julius Fazekas n2wn wrote: > > Is there a way to swap which side the main rx and sub rx audio appears? > > My setup has the main rx on the left and the sub on the right. For whatever > reason I find it easier to dig stuff out of the noise with my right ear. > Noticed this while hunting VP8ORK. > > Just wondering... > > Cheers, > Julius > n2wn > > - > Julius Fazekas > N2WN > > Tennessee Contest Group > http://www.k4ro.net/tcg/index.html > > Tennessee QSO Party > http://www.tnqp.org/ > > Elecraft K2#4455 > Elecraft K3/100 #366 > Elecraft K3/100 #1875 > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/Sub-Rx-listening-option-tp6004816p6004816.html > Sent from the [K3] mailing list archive at Nabble.com. > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Dayton 2011
They have no sales tax in Oregon :) 73, Kevin. KD5ONS On Tue, 08 Feb 2011 10:17:02 -0800, Rex Lint wrote: > They gave free shipping at the NE convention last fall. > > -Rex- > K1HI >Rex Lint >Merrimack, NH >WWW.QRZ.COM/db/k1hi > > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Christ > Sent: Tuesday, February 08, 2011 1:06 PM > To: Elecraft > Subject: Re: [Elecraft] Dayton 2011 > > Wish they would do that at Hamcation. > > David K0LUM > > At 4:16 PM +0800 2/8/11, Johnny Siu wrote: >> Hello Elecrafters, >> >> Elecraft will have a booth in Dayton. Will they usually offer >> special discount >> for sales at their Dayton Booth? >> >> cheers, >> >> >> Johnny VR2XMC >> >> >> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] RV: adding 250Hz filer, any improvement?
thanks all for quickly answers!... 73, Jorge CX6VM/CW5W __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Dayton 2011
They gave free shipping at the NE convention last fall. -Rex- K1HI Rex Lint Merrimack, NH WWW.QRZ.COM/db/k1hi -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Christ Sent: Tuesday, February 08, 2011 1:06 PM To: Elecraft Subject: Re: [Elecraft] Dayton 2011 Wish they would do that at Hamcation. David K0LUM At 4:16 PM +0800 2/8/11, Johnny Siu wrote: >Hello Elecrafters, > >Elecraft will have a booth in Dayton. Will they usually offer >special discount >for sales at their Dayton Booth? > > cheers, > > >Johnny VR2XMC > > > >__ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] adding 250Hz filer, any improvement?
On 2/8/2011 9:49 AM, Jorge Diez - CX6VM wrote: > If I add a KFL3A-250 (250 Hz 8-pole) filter I will notice it better to use > in contests? Or with the 400Hz is enough? Jorge, I find that the 250 Hz filter helps a lot when there are strong signals very close to a weak station. I bought one a year or so ago to try, and quickly bought two more for each RX (I have one radio with a sub-RX). I recently bought a third K3 with one RX and a 400 Hz filter. I plan to add a 250 Hz filter to it as well. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 Kit Questions
Phil - I would definitely recommend considering the SSB option. As another person mentioned, you will need it if you are contemplating using one of the data modes. There is even the (remote) possibility you might want to use SSB at least occasionally . However, the beauty of the K2 is that you can add this option, and the K160 module, which I predict you will eventually want too, at some undefined later date. Therefore, you don't have to plop down all the cash at once, and building some modules later will help with the inevitable "why am I not soldering something today?" feeling that will come upon you once the K2 has been finished for a while. Good luck with the K2. - Jim,. KL7CC Phil Hystad wrote: > > Thanks for all the comments in answer to my question about the K2 Kit. > A possible follow-up question --- one recommendation I received (indirectly out of band from this group) was that the SSB option was useful for the wider filter even if you do not plan to do SSB. > 73, phil, K7PEH > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] adding 250Hz filer, any improvement?
If you have strong stations closer to your frequency than 400 hz, then the 250 hz filter will get rid of them down to 250 hz of your frequency. If the stations that are near you are not strong, the DSP filter will handle it OK. -Rex- K1HI Rex Lint Merrimack, NH WWW.QRZ.COM/db/k1hi -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jorge Diez - CX6VM Sent: Tuesday, February 08, 2011 12:50 PM To: elecraft@mailman.qth.net Subject: [Elecraft] adding 250Hz filer, any improvement? Hello, I have both KFL3A-400 (400 Hz 8-pole) and KFL3A-1.8K (1.8 kHz 8-pole) filters in my K3. If I add a KFL3A-250 (250 Hz 8-pole) filter I will notice it better to use in contests? Or with the 400Hz is enough? Notice I am not in USA or EU with strong stations near me, I don´t have the QRM this big populations have, trying to reduce the splatters. 73, Jorge CX6VM/CW5W k3 #4077 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] LCD TV Causing RFI
On 2/8/2011 7:30 AM, Brian - N5BCN wrote: > FYI, a follow up to my RFI hunting adventure: > > I ordered a bunch of ferrite cores from Mouser, Part #623-0431176451, at > about $7.00 each. They have a 0.72 inch inner diameter. > > The offending HDMI cables are fairly thick; I could only manage two complete > turns and still be able to snap the core shut. Three turns and I had to > zip-tie the core shut. That's why I recommend the larger 1-in i.d. clamp-on. They cost more, but you could have solved your problem with one core having more turns. > The cores helped immensely. I achieved the best results with one core with > three turns and a second core added to the cable with two turns, both on the > DVR end of the cable. The RFI has been abated about 95%. > > Question: does the tightest of the coils going through the core have any > affect on the impedance? Not enough to matter. What WOULD help in your application would be to bunch the turns tightly together so that there is more capacitance between turns, which would lower the resonant frequency. The reason that you needed two cores is that the resonant frequency of your chokes is far too high. Study http://audiosystemsgroup.com/RFI-Ham.pdf to understand this. 73, Jim Brown K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Sub Rx listening option
Turn your headphones around. > > Is there a way to swap which side the main rx and sub rx audio appears? > > My setup has the main rx on the left and the sub on the right. For > whatever > reason I find it easier to dig stuff out of the noise with my right ear. > Noticed this while hunting VP8ORK. > > Just wondering... > > Cheers, > Julius > n2wn > > - > Julius Fazekas > N2WN > > Tennessee Contest Group > http://www.k4ro.net/tcg/index.html > > Tennessee QSO Party > http://www.tnqp.org/ > > Elecraft K2#4455 > Elecraft K3/100 #366 > Elecraft K3/100 #1875 > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/Sub-Rx-listening-option-tp6004816p6004816.html > Sent from the [K3] mailing list archive at Nabble.com. > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Dayton 2011
Wish they would do that at Hamcation. David K0LUM At 4:16 PM +0800 2/8/11, Johnny Siu wrote: >Hello Elecrafters, > >Elecraft will have a booth in Dayton. Will they usually offer >special discount >for sales at their Dayton Booth? > > cheers, > > >Johnny VR2XMC > > > >__ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] adding 250Hz filer, any improvement?
Hello, I have both KFL3A-400 (400 Hz 8-pole) and KFL3A-1.8K (1.8 kHz 8-pole) filters in my K3. If I add a KFL3A-250 (250 Hz 8-pole) filter I will notice it better to use in contests? Or with the 400Hz is enough? Notice I am not in USA or EU with strong stations near me, I don´t have the QRM this big populations have, trying to reduce the splatters. 73, Jorge CX6VM/CW5W k3 #4077 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Sub Rx listening option
Is there a way to swap which side the main rx and sub rx audio appears? My setup has the main rx on the left and the sub on the right. For whatever reason I find it easier to dig stuff out of the noise with my right ear. Noticed this while hunting VP8ORK. Just wondering... Cheers, Julius n2wn - Julius Fazekas N2WN Tennessee Contest Group http://www.k4ro.net/tcg/index.html Tennessee QSO Party http://www.tnqp.org/ Elecraft K2#4455 Elecraft K3/100 #366 Elecraft K3/100 #1875 -- View this message in context: http://elecraft.365791.n2.nabble.com/Sub-Rx-listening-option-tp6004816p6004816.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 REV button and CommCat
Howard, W6HN at CommCat has resolved the problem of CommCat causing the K3 to exit split mode when the REV key is held. For anyone using CommCat who is experiencing this problem, I suggest contacting Howard through the CommCat website (www.CommCat.com) with a request for a link to a downloadable Beta release containing the fix. --Jeff, K6JW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 Kit Questions
Phil, For me, that is an awfully wide filter for CW. I normally tune CW with a filter set to 700 Hz. a 2.4kHz wide filter hears a lot more of the band - too much for me. OTOH, there are some operators who like to use a wide filter to hear a lot of what is going on around their frequency. If you are in that class and have a good "filter between the ears", then by all means use it that way. I might point out one other disadvantage of using the wide filter for CW. If a strong signal is on the band say 1500 Hz away from the weaker signal you are trying to copy, your mind may be able to easily separate the two, but that strong signal is also activating the AGC and all signals in the passband will be reduced in strength because of it. That is why narrow "roofing filters" are offered for the K3 - even though the DSP can create a narrow filter, the hardware AGC is still responding to the strongest signal in the passband. The same argument applies to the K2. 73, Don W3FPR On 2/8/2011 10:39 AM, Phil Hystad wrote: > A possible follow-up question --- one recommendation I received (indirectly > out of band from this group) was that the SSB option was useful for the wider > filter even if you do not plan to do SSB. I have yet to read through all of > the K2 manual (my next project) so I don't know much about the filters on the > K2 so far. > > 73, phil, K7PEH > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 Kit Questions
Gang, Thanks for all the comments in answer to my question about the K2 Kit. As usual, this group is a real benefit to learning all about the Elecraft stuff. My K2 plans look like this: 1. Basic K2 Kit, QRP only. 2. Internal ATU. 3. KAF2 Audio Filter. 4. KIO2. I am in no rush to get the K2 as right now I don't have the time to put one together. But, it will be a Spring or Summer project. A possible follow-up question --- one recommendation I received (indirectly out of band from this group) was that the SSB option was useful for the wider filter even if you do not plan to do SSB. I have yet to read through all of the K2 manual (my next project) so I don't know much about the filters on the K2 so far. 73, phil, K7PEH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] LCD TV Causing RFI
FYI, a follow up to my RFI hunting adventure: I ordered a bunch of ferrite cores from Mouser, Part #623-0431176451, at about $7.00 each. They have a 0.72 inch inner diameter. The offending HDMI cables are fairly thick; I could only manage two complete turns and still be able to snap the core shut. Three turns and I had to zip-tie the core shut. The cores helped immensely. I achieved the best results with one core with three turns and a second core added to the cable with two turns, both on the DVR end of the cable. The RFI has been abated about 95%. Question: does the tightest of the coils going through the core have any affect on the impedance? Thanks for everyone's help on this issue!! N5BCN - Brian - K2 #6800 KSB2 KAT2 KIO2 K160RX KNB2 -- View this message in context: http://elecraft.365791.n2.nabble.com/LCD-TV-Causing-RFI-tp5973980p6004344.html Sent from the [HAM] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 & P3 in a pileup/Split using SUB RX
I had wondered that myself John, so I just checked it. It responds to the Main receiver. Also, APF only works on the Main so that's real handy. Jim > Question on the sub-rx: > Which rx does the CWT indicator respond to when using the sub-rx? > > Thanks, > > John AE5X > http://www.ae5x.com/blog > > >> Wow! Just getting used to using the SUB receiver in a DX pileup > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 & P3 in a pileup/Split using SUB RX
Question on the sub-rx: Which rx does the CWT indicator respond to when using the sub-rx? Thanks, John AE5X http://www.ae5x.com/blog >Wow! Just getting used to using the SUB receiver in a DX pileup __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 & P3 in a pileup/Split using SUB RX
Wow! Just getting used to using the SUB receiver in a DX pileup to locate the right place to transmit. Even with only 100 watts and simple wire antennas, K3 to K3 with a little help from propagation netted me VP8ORK on 40 night before last. Tried many times to get them on other bands, but hadn't gotten used to using the SUB for split. Also managed P29CW on 30 meters just a few minutes ago in only a couple of calls. Really glad I bought the P3 as it shows exactly where the pileup is and helps locate where to tune the TX. The VFO B cursor tends to get lost in the noise clutter, but having it on helps a lot in locating the TX freq on the scope and using the SUB receiver to listen to the pileup makes it a heck of a lot easier than hitting the REV button to check your TX frequency. It would be nice though, if the VFO B marker (not necessarily the marker for A) would have an option to follow the B VFO on the screen, especially when using the SUB receiver. The marker line would be a lot easier to find and position than the cursor alone. Jim - W0EB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] CW transmit filter bandwith
Graham, Tom's comments apply only to certain transceivers. Many use no filters in the transmit path. Specifically, the KX1, K1, and K2 do not run the TX signal through any filter. My old HW-101 however does. So it all depends. The keying waveshape is controlled in the K2 to minimize keyclicks. While a narrow filter can reduce keyclicks, that is not applicable to all transceivers. Different subject: The K3 firmware does not allow the selection of any filter other than the 2.7 (2.8) kHz filter for CW transmit. The menu does not prohibit setting it to any filter, it will not transmit and will present you with a TXF error. 73, Don W3FPR On 2/8/2011 4:49 AM, Graham Smith wrote: > Many thanks for the on and off-list replies. > > It would be useful if folk could write to W8JI and ask him to consider > updating his article (his email is on QRZ.COM) to cover modern CW generation > techniques, since it could result in folk like myself making bad decisions > about choosing transmit filter bandwidths. I would do this but I think it > needs people with a better understanding of the subject than I have > (although it's improving, thanks!). > > Perhaps also the K3 firmware shouldn't allow selection of very narrow > filters for CW transmission? > > 73 de Graham G3ZOD FISTS #8385 > http://www.fists.co.uk > > > -Original Message- > >> Tom W8JI was dealing with analog transceivers when that was written. >> The K3 generates the signal digitally in the DSP portion of the >> transceiver, so many of those old "rules of thumb" for analog radios do >> not apply to the K3. As Guy has said many times on this reflector, >> "This is not your grandaddy's analog radio". >> >> A properly operating K3 does not have key clicks and its transmit IMD is >> very good. >> >> 73, >> Don W3FPR > On 1/17/2011 1:09 PM, Graham Smith wrote: >>> I was reading W8JI's article http://www.w8ji.com/what_causes_clicks.htm > but >>> see that the advice in it (use a narrower filter than an SSB filter for >>> transmitting CW) conflicts with the K3 manual, which says: >>> "Rotate VFO A to select a CW transmit filter (2.7 or 2.8 kHz). Note: Key >>> clicks may result if a narrower filter is selected for CW transmit." >>> Of course I will take the K3 manual's advice, but I am wondering why a >>> narrow filter can cause key clicks? >>> >>> 73 de Graham G3ZOD FISTS #8385 >>> http://www.fists.co.uk > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] XV144 fault (offset problem?)
Don, thank you, always knowledgeable and most helpful as always. I have 116.000MHz :-) I'll do what I should have done 3 years ago and inventory the kit and then contact Sales for the caps. 73 de M0XDF, K3 #174, P3 #108 -- Not all those that wander are lost. -J.R.R. Tolkien, novelist and philologist (1892-1973) On 8 Feb 2011, at 12:52, Don Wilhelm wrote: > Dave, > > Look at the crystal frequency. If it is 116.000 MHz, then yours is OK. > OTOH, if it is 116.010 MHz, then you need to install the mod. > > The bypass capacitors on the 5 volt regulator are applicable to any XV144. > > 73, > Don W3FPR > > > On 2/8/2011 3:33 AM, David Ferrington, M0XDF wrote: >> Yes Don, I have an XV144 kit, not built yet, purchased with the K3, and >> delivered in Dec 2007 - I thought it had a serial number, but I haven't >> built it yet :-( >> >> So, based on it's ship date, can you tell me if my XV144 would be subject to >> this mod, or perhaps based on the Crystal in the kit >> >> I'm guessing from the date of publication that the mod for L19 and the >> Bypass Capacitors probably does apply to my XV144. >> 73 de M0XDF, K3 #174, P3 #108 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] XV144 fault (offset problem?)
Dave, Look at the crystal frequency. If it is 116.000 MHz, then yours is OK. OTOH, if it is 116.010 MHz, then you need to install the mod. The bypass capacitors on the 5 volt regulator are applicable to any XV144. 73, Don W3FPR On 2/8/2011 3:33 AM, David Ferrington, M0XDF wrote: > Yes Don, I have an XV144 kit, not built yet, purchased with the K3, and > delivered in Dec 2007 - I thought it had a serial number, but I haven't built > it yet :-( > > So, based on it's ship date, can you tell me if my XV144 would be subject to > this mod, or perhaps based on the Crystal in the kit > > I'm guessing from the date of publication that the mod for L19 and the Bypass > Capacitors probably does apply to my XV144. > 73 de M0XDF, K3 #174, P3 #108 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 Kit Questions
Phil, I use the KDSP2 and generally like it very much. I set one of the DSP CW filter settings to 50Hz bandwidth and increase the filter gain. Seems to help for pulling weak ones out of the band noise under some conditions. I don't find the sound of signals processed through the DSP filters a problem. The noise reduction works, but requires experimentation with the settings to achieve results. I can understand why some find the NR sound to be a bit unusual but it is no worse than the audio DSP on my TS480. Jeff N7KRT --- On Mon, 2/7/11, Phil Hystad wrote: > From: Phil Hystad > Subject: [Elecraft] K2 Kit Questions > To: "Elecraft Reflector" > Date: Monday, February 7, 2011, 4:51 PM > Gang, > > So, I am thinking that another kit is in my future. I > have a K3 and a KX1 and I am thinking about the K2. I > would be using it for CW and QRP or 2*QRP only. So, I > wouldn't plan on getting the SSB option and I am not > planning on the 100 watt PA or the ATU. > > But, I do have questions about filters (remember, CW usage > only). > > 1. Question: is the radio a completely analog > radio (no DSP) if you DO NOT buy the DSP filter option? > > 2. Question: is the DSP filter worth the > money? > > 3. Question: is the Audio filter useful? > Is the Audio filter still useful if I buy the DSP filter? > > Any other comments and suggestions are definitely > accepted. > > 73, phil, K7PEH > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 has Sold
I have sold my K3. Thanks to all that contacted me. - John K3 # 364 -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-For-Sale-tp5933715p6003783.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 Kit Questions
Hi Phil, I would agree with those who prefer the KAF2 over the KDSP2, I have them both and have reinstalled the KAF2. All analogue antenna to ear. One or the other is a must have. I noticed a huge improvement in the reduction of high frequency hiss from the audio stage with the KAF2 installed, it has a low pass filter stage which is always inline. Regards, Mike VP8NO K2 #1400 K3 #345 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Dayton 2011
Probably not enough to cover your airfare, Johnny ;-) . I look forward to seeing you there. 73, Pete N4ZR On 2/8/2011 3:16 AM, Johnny Siu wrote: > Hello Elecrafters, > > Elecraft will have a booth in Dayton. Will they usually offer special > discount > for sales at their Dayton Booth? > > cheers, > > > Johnny VR2XMC > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Elecraft KUSB
I use the Edgeport-4 USB 4-port Serial adapter. $29 used on eBay from Nationwide Surplus. It is a $300 commercial unit with current drivers for all Windows OSs including Windows 7, which I use. It is one of the few adapters that handles RTTY flawlessly and uses a real UART. I run the K3 rig control, two FSK interfaces and a DXP38 modem on the same 4-port adapter. No problems after several contests. Ed - W0YK/4 > -Original Message- > From: elecraft-boun...@mailman.qth.net [mailto:elecraft- > boun...@mailman.qth.net] On Behalf Of Bill W4ZV > Sent: Monday, February 07, 2011 10:55 AM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] Elecraft KUSB > > > > Bill W4ZV wrote: > > > > Does anyone know the cable length of the most recent adapter (using the > > FTDI chipset)? > > > > 6' is the answer. Another question...has anyone had problems with the > Elecraft KUSB and XP? I got one report of problems with Win7. > > 73, Bill > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/Elecraft-KUSB-tp6000201p6000735.html > Sent from the Elecraft mailing list archive at Nabble.com. > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] SO2V with WriteLog and the K3
SO2V with WriteLog and the K3 Ed Muns, W0YK Contesting with the K3's two receivers is now even more effective with the enhancements in recent WriteLog versions 10.8x. This paper describes the feature for RTTY, but it is also useful for CW and SSB. Basically, an Entry Window is dedicated to each receiver (VFO) and transmit occurs on the VFO frequency whose Entry Window has "focus". SO2V denotes using the two VFOs (sometimes controlling two independent receivers) in the same radio. Two independent receivers are needed to simultaneously listen to both frequencies, one in each ear. This is usually used on the same band, although the K3 allows the receivers to be on different bands. (SO2R denotes using two separate radios in the same way and this is usually done on two different bands.) In WriteLog, the K3's second receiver (Sub-Receiver) is configured in the Ports Setup window as another K3, except that it is given the same COM port assignment as the main K3. (Note that this COM port is for computer control of the K3, different than the two COM ports described below for FSK/PTT keying.) On the Radio/Number of Radios menu, 2 is selected. Then, in each Entry Window, the frequency button is clicked and "Rig on Comm Port x" selected for the first (K3 Main Receiver) and "Rig(2) on Comm Port x" selected for the second (K3 Sub-Receiver). Enable SUB in the K3 and audio from each VFO is fed into the left and right ear, respectively. On the Radio menu, select Headphones Split so that the non-focus audio stream is not muted. Or, if you prefer muting, use Headphones Normal. I always listen to both VFOs (or, both radios in SO2R), but many contesters prefer muting for more focused concentration. For RTTY, two independent modems are needed, one for each receiver. If MMTTY is used for each modem, then two independent installations of MMTTY must be made. Using a standard stereo phone cable, the left (Main receiver) and right (Sub-receiver) audio streams feed the computer soundcard. The first instance of MMTTY is configured to decode the left channel and the second instance of MMTTY is configured to decode the right channel. Call signs selected, i.e., clicked, from each window are copied to the appropriate Entry window For FSK, two additional COM ports are required, again, one for each instance of MMTTY. Separate FSK/PTT keying interfaces are used, one on each COM port. At the K3, the two interfaces are connected to the FSK and PTT inputs on the K3. This makes them logically "wire-OR'd" for those who know what that means. Operationally, only one of the interfaces will be keyed by WriteLog/Rttyrite/MMTTY at a given time, so there is no conflict and either one drives the K3 when it's Entry Window has focus. I haven't explored this scheme using AFSK, but the principle is the same. Both instances of MMTTY should be able to drive the soundcard speaker, or Line Out, output which is connected to the K3 Line In jack. When focus is moved to the second Entry Window, the K3 is simply put into SPLIT mode so that transmission occurs on that frequency. Receive decoding remains fixed in each of the two Rttyrite MMTTY windows. When focus is moved back to the first Entry Window, SPLIT is removed so that any transmission occurs on the Main receiver's frequency, using the call sign in that Entry Window. If a KAT3 is installed in the K3, writelog.ini can be configured to swap between ANT1 and ANT2 as focus moves between the two Entry Windows. This is envisioned to provide SO2R with a single K3 on two different bands. Seems like it should work although I haven't tried it. I want separate radios for SO2R which is supported by commercial SO2R accessories like antenna switches. In addition, macros of K3 programmable commands can be defined in writelog.ini and assigned to keyboard keys as well as used in messages. This opens up lots of possibilities exceptional K3-WriteLog integration. Consult the WriteLog Help file for details (search on 'K3'.) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] CW transmit filter bandwith
Many thanks for the on and off-list replies. It would be useful if folk could write to W8JI and ask him to consider updating his article (his email is on QRZ.COM) to cover modern CW generation techniques, since it could result in folk like myself making bad decisions about choosing transmit filter bandwidths. I would do this but I think it needs people with a better understanding of the subject than I have (although it's improving, thanks!). Perhaps also the K3 firmware shouldn't allow selection of very narrow filters for CW transmission? 73 de Graham G3ZOD FISTS #8385 http://www.fists.co.uk -Original Message- > Tom W8JI was dealing with analog transceivers when that was written. > The K3 generates the signal digitally in the DSP portion of the > transceiver, so many of those old "rules of thumb" for analog radios do > not apply to the K3. As Guy has said many times on this reflector, > "This is not your grandaddy's analog radio". > > A properly operating K3 does not have key clicks and its transmit IMD is > very good. > > 73, > Don W3FPR On 1/17/2011 1:09 PM, Graham Smith wrote: >> I was reading W8JI's article http://www.w8ji.com/what_causes_clicks.htm but >> see that the advice in it (use a narrower filter than an SSB filter for >> transmitting CW) conflicts with the K3 manual, which says: >> "Rotate VFO A to select a CW transmit filter (2.7 or 2.8 kHz). Note: Key >> clicks may result if a narrower filter is selected for CW transmit." >> Of course I will take the K3 manual's advice, but I am wondering why a >> narrow filter can cause key clicks? >> >> 73 de Graham G3ZOD FISTS #8385 >> http://www.fists.co.uk __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] XV144 fault (offset problem?)
Yes Don, I have an XV144 kit, not built yet, purchased with the K3, and delivered in Dec 2007 - I thought it had a serial number, but I haven't built it yet :-( So, based on it's ship date, can you tell me if my XV144 would be subject to this mod, or perhaps based on the Crystal in the kit I'm guessing from the date of publication that the mod for L19 and the Bypass Capacitors probably does apply to my XV144. 73 de M0XDF, K3 #174, P3 #108 -- Sometimes I think we're alone in the universe, and sometimes I think we're not. In either case, the idea is quite staggering. -Arthur C Clarke, science fiction writer (1917- ) On 8 Feb 2011, at 02:17, Don Wilhelm wrote: > David, > > This is for the external XV144 transverters, no serial numbers involved. > > 73, > Don W3FPR > > On 2/7/2011 9:08 PM, David Ferrington, M0XDF wrote: >> Can you say from which serial number this affects, Eric? >> 73 de M0XDF, K3 #174, P3 #108 >> >> The best time to plant a tree was 20 years ago. The second best >> time is today. ~Chinese proverb~ >> >> >> On 8 Feb 2011, at 00:17, Eric Swartz - WA6HHQ, Elecraft wrote: >> >>> Yes, this mod adds an adjustable coil to move the newer XV144 crystals >>> within the +/- 9.9 kHz calibration range of the K3. In most cases it >>> will pull the crystal far enough to use an offset of zero, but that is >>> not guaranteed in all cases. There is a place already on the XV144 PCB >>> for this part. >>> >>> We offer the XV144MDKT at no cost and the user only pays shipping. It >>> should be up on the parts and mod kits order web page in the later this >>> week. >>> >>> 73, Eric WA6HHQ >>> >>> >>> >>> On 2/7/2011 11:16 AM, hb9wi wrote: Hi Eric I noticed that Elecraft has published two errata sheets on the transverters. They mention an additional coil L19 in series to the crystal. May I order the coil at Elecraft? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Dayton 2011
Hello Elecrafters, Elecraft will have a booth in Dayton. Will they usually offer special discount for sales at their Dayton Booth? cheers, Johnny VR2XMC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
