| Index | Thread | Archive | May-2003 | Archive | Send |
 |
  |
 |
   |
|
  |
|
During the New England QSO Party, I noticed SWR on my C3E on 15m was about 2.5:1, much higher than usual. SWR was it's normally very low 1.1:1 on 20m. Since I was operating QRP, I went to tune mode and increased the power to 100 watts. As I did so, the SWR suddenly dropped to a more reasonable 1.2:1. Unfortunately, it did not 'take'. Back down to QRP level and the SWR was again 2.5:1 and fluctuating up and down around that. After the NEQP, I ran a coax jumper from the feedline entry point in the garage to the FT100 in the car and saw the same intermittency. Increasing power towards 100 Watts seemed to 'fix' the SWR back to normal levels. I figure it's an intermittency problem within one of the elements/segments? I've a used C4 in the garage, so I guess this is the impetus I need to assemble it, take down the C3E and put up the C4. My thoughts about the intermitency is that I'm going to have to remove the rivets, clean the element segment contact surfaces, reapply noalox, and reassemble. I figure I should start with the 15m director and reflector elements first, then do the driver. Thoughts? I've also got the C4 upgrade kit (40m element and mounting kit) that I was going to put on the C3E. But now, it stays in the box. At least, until I get the C4 up on top (70'). I've a Cushcraft A3 sidemounted on the tower at 40' and fixed on Northwest (W6/7/JA). I'm now thinking of taking it down and putting up the C3E (w/40m element) in it's place, once the intermittency problem is resolved. Any suggestions or ideas? 73, dale, kg5u -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force12 Web Site: http://www.force12inc.com To Submit Message to the List: Force12Talk@qth.com To unsubscribe and view the Message Archive: see http://qth.com/force12/list For problems with the list: contact n4zr@qth.com |
This Thread
|
This Author (May-2003)
|