KX1 Receiver Alignment
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All,
I have completed Phase II of construction and have a couple of questions. But first, I have the RF Gain set to full clockwise, Filter full CCW and AF Gain at about the 12 O'clock position. I have a 28' piece wireman 541 wire connected to the red side and a 16' piece of the same wire to the black side of a double BNC antenna connection. I'm using a SONY MDR NC60 Noise canceling headset. All the tests are good except I am not able to peak the trimming capacitors. I do hear some static in the back ground but I don't think I'm doing it right since I cannot find Peak. Do the trimmers have a max number of turns in one direction before the reach a stop or will they just keep turning? Can they be broken by over turning in one direction? I need some help understanding this process. Thanks and 73 Ed KE7HGA |
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Ed,
The trimmers are normal one turn trimmer capacitors. I any one full rotation, you should find 2 places where the signal peaks. The order of things is important - peak 20 meters first - if you cannot find a peak on 20 meters, you have something wrong and will have to look for the problem source (most likely is a bad solder connection). After peaking both trimmers for 20 meters, switch to 40 and peak that band's trimmer. If you have found a peak on both bands, all should be OK. I would initially run with the Bandwidth control at 1/3 to 1/2 clockwise rotation rather than full CCW. The RF Gain at full CW and the AF gain sufficiently advanced to hear something. EMD wrote: > All, > > I have completed Phase II of construction and have a couple of questions. But first, I have the RF Gain set to full clockwise, Filter full CCW and AF Gain at about the 12 O'clock position. I have a 28' piece wireman 541 wire connected to the red side and a 16' piece of the same wire to the black side of a double BNC antenna connection. I'm using a SONY MDR NC60 Noise canceling headset. All the tests are good except I am not able to peak the trimming capacitors. I do hear some static in the back ground but I don't think I'm doing it right since I cannot find Peak. Do the trimmers have a max number of turns in one direction before the reach a stop or will they just keep turning? Can they be broken by over turning in one direction? > > I need some help understanding this process. > > Thanks and 73 > > Ed KE7HGA > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.0.238 / Virus Database: 270.11.51/2052 - Release Date: 04/10/09 06:39:00 > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Hi Don,
I think I may have found the problem. When I installed X1 I attached a ground to the top of the crystal. I used the same technique when I installed X2 through 5. After rereading the installation portion of the manual I read that the ground should be attached no more than 3/16" from the bottom of the crystal. Do you think this is the problem? Thanks Ed
On Apr 10, 2009, at 5:17 PM, Don Wilhelm-4 (via Nabble) wrote: Ed, |
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Ed,
The crystal grounding on X2 thru X5 is designed to allow space for the batteries. So that is not the source of your prroblem. 73, Don W3FPR EMD wrote: > Hi Don, > > I think I may have found the problem. When I installed X1 I attached > a ground to the top of the crystal. I used the same technique when I > installed X2 through 5. After rereading the installation portion of > the manual I read that the ground should be attached no more than > 3/16" from the bottom of the crystal. Do you think this is the problem? > > Thanks > > Ed > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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