Thank you, that appears to have been the problem. While I don't have access to a signal generator or another transmitter, I did find a strong signal on 15. I then worked on 20 and low and behold, the band came alive.
I now feel that I can proceed with the KAT1 and finish this thing up. But before I install the KAT1, I will try to locate a signal generator and make sure I've got everything aligned before installing the tuner. Thanks again 73, Don KJ4MRB Don Wilhelm wrote: > Don, > > Are you certain you have the Pre-mixer capacitors set properly for 15 > meters? It is quite possible to set them for a response in the 31 MHz > range instead of the correct 25 MHz range. If that happens, you will > not be able to align the Pre-mix bandpass to 20 meters. Start with > the 15 meter capacitors set near the center position (with the slot > pointing to the narrow end of the capacitor) and do not vary them more > than 30 degrees from that position while tuning. > > Be certain you are really hearing signals in the 15 meter band when > doing the initial receive alignment of the pre-mixer bandpass filter. > If you do not have a signal generator for 15 meters, use another ham > transmitter transmitting at low power into a dummy load and connect a > short antenna wire to the K1 - place the wire near the dummy load. > > After aligning 15 meters, try aligning 20 meters again. > > 73, > Don W3FPR > > Don Herring wrote: >> Greetings >> >> I'm a newbie building a K1-4. Everything was going OK until the >> receiver alignment phase of the build where I ran into a problem >> where I could not hear anything on 20M. >> >> After searching the list and several exchanges with Elecraft support, >> I had not gotten anywhere in resolving the problem. Based on >> previous issues seen on the list regarding 20M, Elecraft did send me >> a couple of replacement crystals for the band. >> >> In the mean time, I completed the transmitter section and was able to >> get output on 40, 30, and 15 - no output on 20 as per an external >> wattmeter. >> >> Replacing the 20M crystal had no effect. Using my Ten-Tec RX-320D, I >> was able to verify operation of all the crystals, including 20M. >> >> I put together a RF probe this weekend and started signal tracing. >> This is what I have found, though the finding does not make much >> sense to my inexperienced mind. >> >> At step 8 in the signal tracing procedure in the K1 Manual, I was >> getting 0 voltage on 20M, and anywhere from 0.025 t0 .035 on the >> other bands. >> I started tracing back from P1 pin 6, and took a reading at T2 which >> is the source of my puzzlement. >> >> I can see voltage on all bands going into T2 on lead 3, but no >> voltage at lead 2 for 20M - I'm getting a reading on lead 2 for all >> other bands. >> >> So it appears T2 may be the source of my problem. But it doesn't >> click with me that the toroid can be a problem with just one band. >> >> One other oddity is that even though I'm not seeing any signal on the >> external wattmeter I can hear 20M on the RX-320. >> >> Am I on the right track here, or do I need further testing before >> working on T2? >> >> THX, and 73 >> >> Don, KJ4MRB >> ______________________________________________________________ >> 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 >> ------------------------------------------------------------------------ >> >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com Version: 8.5.375 / Virus Database: >> 270.13.10/2231 - Release Date: 07/11/09 05:57:00 >> >> > ______________________________________________________________ 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
