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Total 14 documents matching your query.

1. Topband: Reactance problem (score: 1): Author: Billg@warwick.net (Bill Gerhold); Date: Tue, 12 Mar 2002 20:47:24 -0500; Why would the reactance change on a ground mounted vertical for no apparent reason. I used to get a resonance point at 1.840mhz. Lowest SWR was at 1.850. All was fine until about 1 month ago. Checkin; /archives//html/Topband/2002-03/msg00112.html (7,988 bytes)
2. Topband: Reactance problem (score: 1): Author: gtucker@bostoneng.com (G.E. Tucker); Date: Wed, 13 Mar 2002 10:47:39 +0000; I wonder if perhaps it is because the condition of your ground has changed (drought condition?). Will be interested to see what others say. 73, George W5VU; /archives//html/Topband/2002-03/msg00116.html (7,590 bytes)
3. Topband: Reactance problem (score: 1): Author: Billg@warwick.net (Bill Gerhold); Date: Wed, 13 Mar 2002 11:01:01 +0000; A few have suggested my MFJ-259b is off or inaccurate. This does not seem to be the case. In order to verify the MFJ is ok, I connected it to a dummy load and was able to measure zero reactance immed; /archives//html/Topband/2002-03/msg00118.html (8,714 bytes)
4. Topband: Reactance problem (score: 1): Author: W2pm@aol.com (W2pm@aol.com); Date: Wed, 13 Mar 2002 06:21:08 EST; I don't suggest this is the issue here but I have found after extensive work with it that the MFJ259B is quite sensitive to BC band and/or any other "strong RF" coming in off the antenna in question.; /archives//html/Topband/2002-03/msg00119.html (8,024 bytes)
5. Topband: Reactance problem (score: 1): Author: W2pm@aol.com (W2pm@aol.com); Date: Wed, 13 Mar 2002 06:26:23 EST; Another possible "issue" with the MFJ259B I found (but did not contribute to accuracy)was not so untypical fit and finish issues with MFJ product quality. This is not a flame on them but my objective; /archives//html/Topband/2002-03/msg00120.html (8,381 bytes)
6. Topband: Reactance problem (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 13 Mar 2002 08:12:44 -0500; work with it that the MFJ259B is quite sensitive to BC band and/or any other "strong RF" coming in off the antenna in question. I do not live particularly close to BC stations but was getting strange; /archives//html/Topband/2002-03/msg00122.html (8,889 bytes)
7. Topband: Reactance problem (score: 1): Author: tposey@omnicom-usa.com (Terry Posey); Date: Wed, 13 Mar 2002 08:36:34 -0500; K2WH wrote, in part: Troubleshooting via email is a best guess process; but, it sounds like you have water in your coax or tuning network to me. Water in coax often makes the line appear reactive ove; /archives//html/Topband/2002-03/msg00123.html (8,214 bytes)
8. Topband: Reactance problem (score: 1): Author: w7iuv@earthlink.net (Larry Molitor); Date: Wed, 13 Mar 2002 13:35:32 +0000; Most likely this is the problem. I suspect that a new AM station came up or an old one increased power level. In my case, the real part of the impedance is not effected much, but the reactive part ca; /archives//html/Topband/2002-03/msg00124.html (8,731 bytes)
9. Topband: Reactance problem (score: 1): Author: wpgerhold@longo-ind.com (Bill Gerhold); Date: Wed, 13 Mar 2002 11:53:07 -0500; To all the respondents of my REACTANCE anomaly, here is some more information and thanks for the responses. No changes were made to the antenna from a zero reactance finding to the current non-zero r; /archives//html/Topband/2002-03/msg00125.html (8,975 bytes)
10. Topband: Reactance problem (score: 1): Author: kimba@sprint.ca (Bert Barry); Date: Wed, 13 Mar 2002 12:52:31 -0500; I think this answer is the only one that makes any sense. I have the same problem using an Autek - the reactance can't be reduced to zero with any setting of the series capacitor tuning my shunt fed; /archives//html/Topband/2002-03/msg00127.html (8,790 bytes)
11. Topband: Reactance problem (score: 1): Author: herbs@vitelcom.net (Herb Schoenbohm); Date: Wed, 13 Mar 2002 12:03:34 -0400; Another suggestion is to run the same test after local sunset. Most of the AM stations in the country have a much lower night time power and are required to switch to that after local sunset. Some st; /archives//html/Topband/2002-03/msg00128.html (8,941 bytes)
12. FW: Topband: Reactance problem (score: 1): Author: garry@ni6t.com (Garry Shapiro); Date: Thu, 14 Mar 2002 08:55:05 -0000; IMHO, one must be very careful when any sort of network is introduced between the antenna being measured and the MFH unit, to prevent seriously altering the reading. A two-terminal or one-port devic; /archives//html/Topband/2002-03/msg00131.html (9,251 bytes)
13. Topband: Reactance problem (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 14 Mar 2002 05:59:15 -0500; An open shield connection or water in the cable can cause reactance to appear over a wide frequency range. Additional problems are dc or low frequency AC getting into the meter input, or the unit is; /archives//html/Topband/2002-03/msg00132.html (8,114 bytes)
14. Topband: Reactance problem (score: 1): Author: sire@iinet.net.au (Steve Ireland); Date: Fri, 15 Mar 2002 02:51:15 +0000; VK6VZ replied: G'day My Autek RF-1 suffers in a similar manner from BC-pickup - in this case from a 100kW BC station some 20km away. When I put up my Marconi-T with a 66' vertical section, the impeda; /archives//html/Topband/2002-03/msg00140.html (8,699 bytes)

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