http://groups.yahoo.com/group/spectrumanalyzer/ Spectrum Analyzer Projects Sun, 08 Nov 2009 02:30:11 GMT william sprowls http://groups.yahoo.com/group/spectrumanalyzer/message/5137 http://groups.yahoo.com/group/spectrumanalyzer/message/5137 Hi Neal, Unequal screw lengths would suggest that the center stub is either not centered or of different length.  I think you are destined to remove the top Sat, 07 Nov 2009 23:35:55 GMT nealmartini http://groups.yahoo.com/group/spectrumanalyzer/message/5136 http://groups.yahoo.com/group/spectrumanalyzer/message/5136 Thanks Scotty for the reply. From the comments you made it sounds like I have overcoupling. What would you suggest needs to change to decrease the coupling? Sat, 07 Nov 2009 20:41:07 GMT william sprowls http://groups.yahoo.com/group/spectrumanalyzer/message/5135 http://groups.yahoo.com/group/spectrumanalyzer/message/5135 Hi Neal,   First off, you can re-tap the bad thread with a larger screw size. This is not critical.  You can use a larger diameter screw and, if you want to, Sat, 07 Nov 2009 17:08:17 GMT nealmartini http://groups.yahoo.com/group/spectrumanalyzer/message/5134 http://groups.yahoo.com/group/spectrumanalyzer/message/5134 I finally have a coax filter for the MSA I am building. I have a few problems that I hope I can tap the wisdom of the group to solve. I posted a picture of the Sat, 07 Nov 2009 00:29:44 GMT brian_ve7jkz http://groups.yahoo.com/group/spectrumanalyzer/message/5133 http://groups.yahoo.com/group/spectrumanalyzer/message/5133 A minor thing, but it looks like there's a documentation error. The parts list shows R12 but the schematic has a note that Rev B deletes R12. Brian VE7JKZ Fri, 06 Nov 2009 02:07:45 GMT brian_ve7jkz http://groups.yahoo.com/group/spectrumanalyzer/message/5132 http://groups.yahoo.com/group/spectrumanalyzer/message/5132 I suspect you are correct Sam. ON Semi list the NL17SZ74 as a replacement for the NC7SZ74 with markings as you have indicated, so I shall press on with Fri, 06 Nov 2009 01:46:23 GMT swetterlin http://groups.yahoo.com/group/spectrumanalyzer/message/5131 http://groups.yahoo.com/group/spectrumanalyzer/message/5131 It appears to me that the SZ74 from ON Semiconductor are marked MH X, where X is a date code, so maybe that is what you have. Sam W. Thu, 05 Nov 2009 22:55:04 GMT brian_ve7jkz http://groups.yahoo.com/group/spectrumanalyzer/message/5130 http://groups.yahoo.com/group/spectrumanalyzer/message/5130 ... Tnx Bob - are yours via Cash or Digikey? Brian VE7JKZ Thu, 05 Nov 2009 21:51:35 GMT wb7dmx http://groups.yahoo.com/group/spectrumanalyzer/message/5129 http://groups.yahoo.com/group/spectrumanalyzer/message/5129 ... should be ok, as mine are also marked MHT bob WB7DMX Thu, 05 Nov 2009 19:40:47 GMT brian_ve7jkz http://groups.yahoo.com/group/spectrumanalyzer/message/5128 http://groups.yahoo.com/group/spectrumanalyzer/message/5128 Hi folks: I'm in the process of populating the PDM board (tnx Jim!) and have a query on the NC7SZ74. This board uses three of the devices and I have two that Thu, 05 Nov 2009 01:50:45 GMT swetterlin http://groups.yahoo.com/group/spectrumanalyzer/message/5127 http://groups.yahoo.com/group/spectrumanalyzer/message/5127 I realized I have not posted a link to my website in the Links section. I have now done so. The website itself is "http://www.wetterlin.org/sam/". I also Thu, 05 Nov 2009 01:25:17 GMT swetterlin http://groups.yahoo.com/group/spectrumanalyzer/message/5126 http://groups.yahoo.com/group/spectrumanalyzer/message/5126 There was recently a group buy of boards. The main parts that benefit from a group buy are the Mini-Circuits parts, which Mini-Circuits now makes available as Thu, 05 Nov 2009 01:15:09 GMT swetterlin http://groups.yahoo.com/group/spectrumanalyzer/message/5125 http://groups.yahoo.com/group/spectrumanalyzer/message/5125 I removed some documents from the Files section and consolidated them on my website at "http://www.wetterlin.org/sam/SA/Operation/MSAasVNA.htm" This document Wed, 04 Nov 2009 23:25:14 GMT wb7dmx http://groups.yahoo.com/group/spectrumanalyzer/message/5124 http://groups.yahoo.com/group/spectrumanalyzer/message/5124 don't take the no response so quickly, there is a lot going on in here and there is a awsum amount of help. I don't know if there is a group buy right now, nor Wed, 04 Nov 2009 22:17:47 GMT rightstuff4u2 http://groups.yahoo.com/group/spectrumanalyzer/message/5123 http://groups.yahoo.com/group/spectrumanalyzer/message/5123 ... I guess I'll take the no response from 984 members of this list as a "no." I'm looking into building an analyzer for my personal use. Does anybody have a