Don, OK, didn't know that... I have to admit I didn't build my K2 myself but bought a used one. The guy who sold it to me actually has done what is described on your page, the rig was delivered with some kind of "test protocol" that includes a "filter response" measured with your approach.
Germany's QST equivalent "cq DL" also described this method a few months ago, I think the author was the "official" german Elecraft importer DL2FI... Vy 73 Ralf, DL6OAP Am 20.05.2013 um 19:59 schrieb Don Wilhelm <[email protected]>: > Ralf and Christophe, > > Yes, what you say is true, but the answer is still in the filter alignment. > All the SSB filters should be aligned - AND - in many (most) K2s built in the > last several years, the suggested settings for the SSB filters other than the > OP1 BFOs do not work well. That is because the varactors have changed (the > type has not changed, but the capacity range has increased - blame the > manufacturer!). > The result of this varactor variation is that the filter width displayed by > the K2 is usually much more narrow than the actual width (not true for the > OP1 filter which has no varactors). I do not know of any way to easily find > the actual width of the filter other than using an audio spectrum analyzer > like Spectrogram. > > 73, > Don W3FPR > > On 5/20/2013 1:25 PM, Ralf Wilhelm wrote: >> Hi, Christophe and Don, >> >> There is a point I don't understand: The K2 switches to "VFO below rx >> frequency" on 15 and above (main manual page 85) thus resulting in sideband >> "inversion". So, if Christophe can receive USB on 15, shouldn't that mean >> that the BFO is properly set for LSB reception on 17 and below? If he can >> also receive USB on 20, shouldn't that mean that both BFO settings are ok? >> >> Greetings >> >> Ralf, DL6OAP >> >> >> Am 20.05.2013 um 17:41 schrieb Christophe F8ACF-56 <[email protected]>: >> >>> Hello Don, >>> >>> I will review it with the page of your site, the problem for me I think is >>> a misunderstanding of the text in your language, but the idea is to learn >>> your language :-) >>> >>> I'll let you know as well as the list of results >>> >>> thank you again for your help ! >>> >>> 73 , Christophe F8ACF-56 >>> >>> >>> ________________________________ >>> De : Don Wilhelm <[email protected]> >>> À : Christophe F8ACF-56 <[email protected]> >>> Cc : "[email protected]" <[email protected]> >>> Envoyé le : Lundi 20 mai 2013 17h15 >>> Objet : Re: [Elecraft] K2 and SSB >>> >>> >>> Christophe, >>> >>> The usual cause is that the LSB BFOs are not set up properly. >>> I strongly urge the use of Spectrogram or other audio spectrum analyzer >>> to see where the filter passband is placed. >>> See part 3 on the K2 Dial Calibration article on my website >>> www.w3fpr.com. If you need to obtain Spectrogram, look near the bottom >>> of the opening page on my website for the link. >>> >>> 73, >>> Don W3FPR >>> >>> On 5/20/2013 10:45 AM, Christophe F8ACF-56 wrote: >>>> Hello to all, >>>> >>>> since I installed my KSB2 I correctly RECEIVE SSB only on 14 MHz and 21 >>>> MHz 7 is not clear on closer understanding is CW, although this may not be >>>> entirely clear. >>>> >>>> I would say it is like when you are in AM and you listen a "SSB >>>> station" >>>> >>>> thank you for your help >>>> >>>> K2 # 7369 >>>> >>>> 73 , Christophe F8ACF-56 >>>> ______________________________________________________________ >>>> 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
