Nick, Sometimes the filters (particularly the narrower ones) do not respond well to the initial numbers in the manual because the filter center may be shifted a bit due to the particular set of matched crystals supplied. I don't think you have a problem.
There is a solution, and that is called 'Spectrogram', which will provide a visual display of the filter shape and positioning on a computer screen. Download the last freeware version (5.17) of Spectrogram from www.n0ss.net and look at the instructions for using it on Tom's website or the Builder's Resource page of the Elecraft website. You could let the filter alignemnt wait until you have the rest of the K2 built and the KSB2 (if you added that) installed and then you can do a complete dial calibration and filter alignment. Instructions for doing that are on my website http://w3fpr.qrpradio.com 73, Don W3FPR > -----Original Message----- > > Thrilled to get my K2 working on 7 MHz receive but I seem to have > a problem with filter settings. > Everything has checked out according to the book - no problems at > all (even my home-wound coils seem to work!!) > I have set up the filters exactly according to pages 88 and 89. > On Filter 1 the rx sounds great - plenty of gain, clean signals. > On the other 3 filters it sounds like I am listening through a > dense fog - I can tell the bandwidth is far narrower than F1 but > signals are weak and it sounds as if the filters are overlapping > each other (if you know what I mean). I have checked settings > again and all look OK. Does anyone recognise this problem please? > I am reluctant to proceed until I have sorted it out. > 73 Nick G3RWF > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.11/723 - Release Date: 3/15/2007 11:27 AM _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
