Dear Don, thank a lot for your help! The problem now is solved! As you suggested I checked RF signal on U1, U2, D2, Q2 and Q1, but for the last component I found it was missing! I checked it on assembly step on page 28 but I didn't install it at all. So I have installed the 2N7000 FET and now S-meter is working very well (using factory defaults).
Building K1 is an exciting training experience. Thank you again. 73', Enzo IW7DMH Il 01/04/12 15.58, Don Wilhelm ha scritto: > Enzo, > > You most likely have a soldering problem or an incorrectly placed > component. Component failures are rare unless they were damaged from > static when handling. > Take a look at the RF Board Schematic sheet 1. To the right of and > below the "AGC" label on the left side you will see the components > associated with the AGC. You can check the no signal voltages shown > there as an assist in finding the failure. Make certain D2 is > oriented correctly, and that Q1 and Q2 are inserted in the correct holes. > It is also possible that Q1 was damaged by static when you inserted it > - the 2N7000 FETs are static sensitive. > > 73, > Don W3FPR > > On 4/1/2012 5:05 AM, iw7dmh wrote: >> Good morning, >> >> I'm building a new K1-4 (sn. 3091) and I have completed the RF-Board >> part I. >> My building experience il reported in my association forum >> http://www.arilecce.it/index.php?option=com_kunena&func=view&catid=18&id=399&limit=6&limitstart=18&Itemid=94 >> >> >> http://www.arilecce.it/index.php?option=com_kunena&func=view&catid=18&id=399&limit=6&limitstart=18&Itemid=94 >> >> >> >> It seems everything is working well as I have successfully completed >> receiver alignment procedure. >> Now I'm going to find S-meter zero point following the steps >> described on >> page 53 of manual. >> After disconnecting the antenna, the S-meter still indicate a full scale >> signal (all bars are on). This happen for any value of Lxx and I'm >> wondering >> if something in my test is wrong or this problem hides a mistake in my >> building procedure. >> I also found a current consumption (on receiving) of about 35 mA that >> is a >> bit lower than the expected 55mA. Could it be another problem? >> I hope you can help me. >> >> Best regards. >> >> 73', IW7DMH >> Enzo >> >> > ______________________________________________________________ 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
