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maybe wriggle the element while watching the meter. 73, Dan, N5AR ----- Original Message ----- From: Dale L Martin <kg5u@hal-pc.org> To: <Force12Talk@qth.com> Sent: Monday, May 05, 2003 7:00 PM Subject: [Force 12 Talk] Intermittency? > > 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 > > -------------------------------------------- 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 |
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