Hello Om, Although K3 comes with excellent specifications, the construction materials are fairly primitive . From my observation of other radios, there are not too many shielded metal boxes inside K3. Perhaps K3's small size gives some restrictions in design. I prefer di-cast cases but the radio will be heavier.
Sent from my iPhone 4 juergen <[email protected]> 於 2011年6月13日 下午3:32 寫道： > Hi Johnny > > The OMNI6 had the same birdie problems. The birdie elimination routine is not > all that effective and leaves holes in the band. I dont see how a more > powerful DSP is going to help birdie removal. > > The best solution is a redesign of the boards with more shielding. The K3 is > a very "open" design with regards to the internal shielding. When I added the > second receiver I used some space blanket material that was grounded to the > chasis, it did help a small amount. > > Ten Tec did improve the shielding for the 10 meter birdie problem, however > that was not very effective also. Most operators used homebrew shielding > solutions using 3rd party shielding material. I used space blanket material > which helped. > > No Birdies will happen In the K4, I suppose. Birdie problems are too hard to > fix after the design has been released. The K3 is what it is, I will just > wait for the K4 or wait for some other brand of miracle radio. The openHPSDR > Hermes is starting to look good! > > This sunspot cycle looks like its going to be a poor one. I can ignore the > birdies on the higher bands by not using the radio, I wont be missing much. > The K3 unfortunately needs the preamp to be left on, on the higher bands > which makes the birdies worst, especially with the P3. You cant win! > > 73 > > Juergen > > > > --- On Sun, 6/12/11, Johnny Siu <[email protected]> wrote: > >> From: Johnny Siu <[email protected]> >> Subject: [Elecraft] P3 Broad Birdie & straw men... >> To: "[email protected]" <[email protected]>, "Reflector >> Elecraft" <[email protected]> >> Date: Sunday, June 12, 2011, 11:44 PM >> Hello Jim, >> >> I fully appreciate the PITA and am annoyed about it. >> >> The elimination of internal birdies require substantial >> amount of DSP power. In the circumstances, by taking >> advantage of the module design of K3, a new more >> powerful DSP board to replace the existing one may be the >> ultimate solution in the future. Of course, this will take >> Elecraft some time to implement >> >> At the current moment, I still feel that K3 is the >> smallest portable high performance radio with true dual >> receivers. It will not be practical for me to take my >> IC7800 easily to other QTH to operate. >> >> I am going to do some IOTA operation this week end and >> will bring my K3 with me. >> >> TNX & 73, >> >> >> Johnny VR2XMC >> >> 從︰ Jim Brown <[email protected]> >> 收件人︰ Reflector Elecraft <[email protected]> >> 傳送日期︰ 2011年06月13日 (週一) 1:25 PM >> 主題︰ Re: [Elecraft] P3 Broad Birdie & straw >> men... >> >> I understand exactly what you are talking about -- my case >> #2, but I >> also realized that what K3TUF and N6XI are talking about >> was my case >> #1. Your birdies and noise are from OUTSIDE the radio. >> Their's are >> only INSIDE the radio. I experience both. >> >> Notice that Phil says "Must be on the IF because it is >> never heard even >> when it is in the >> apparent bandwidth window." >> >> These INTERIOR birdies also get MUCH stronger when you have >> the SUB RX >> turned on. During the VHF contest, I split my time >> between CW and SSB, >> with the SUB RX listening to whichever one I wasn't >> transmitting on. >> The thing that's a PITA about this is that you think that >> these are >> signals that you can work, so you switch from SSB to CW to >> work them, >> but they aren't really there. There are also some fairly >> weak >> birdies/noise peaks that look like weak CW signals, but are >> not. And I >> worked nearly a dozen weak CW signals that looked like >> those >> birdies/noise peaks, and as you tune to work them, they >> also disappear. >> >> 73, Jim K9YC >> >> On 6/12/2011 6:34 PM, John Ragle wrote: >>> second paragraph, and I believe the other posts are >> talking about >>> exactly the same thing. If you will take the time to >> read what they >>> wrote, you might recognize as much. Perhaps your >> objection is to the >>> use of the word "birdie" in this context? >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> 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:[email protected] >> >> 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:[email protected] > > 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
