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Total 6 documents matching your query.

1. [TenTec] Titan tuning drift on 160 meters (score: 1): Author: Ken Brown <ken.d.brown@verizon.net>; Date: Fri, 10 Oct 2003 14:44:35 -1000; Hi All, My Titan 425 has a drift problem with tuning on 160 meters. I have posted this question before and got some conflicting answers. All seem to agree that the problem is caused by capacitors in; /archives//html/TenTec/2003-10/msg00317.html (8,643 bytes)
2. Re: [TenTec] Titan tuning drift on 160 meters (score: 1): Author: "Stuart Rohre" <rohre@arlut.utexas.edu>; Date: Fri, 10 Oct 2003 19:50:02 -0500; In general, disc capacitors which are placed under extremes of voltage or power can have heating issues, leading to change of capacitance as the cap heats up and cools alternately. They are also piez; /archives//html/TenTec/2003-10/msg00318.html (7,100 bytes)
3. Re: [TenTec] Titan tuning drift on 160 meters (score: 1): Author: Ken Brown <ken.d.brown@verizon.net>; Date: Fri, 10 Oct 2003 15:10:17 -1000; Thanks Stuart, I know that doorknob capacitors are the way to go for HV RF and high current RF too. My problem is that I live on an island out in the middle of the Pacific Ocean, and here the best (m; /archives//html/TenTec/2003-10/msg00319.html (8,693 bytes)
4. Re: [TenTec] Titan tuning drift on 160 meters (score: 1): Author: K3BU@aol.com; Date: Fri, 10 Oct 2003 22:47:46 EDT; Your most likely #1 culprit is C15 400 pF. Then #2 and 3 would be C17 and C16. You might want to try to minimize the drift by using say 4x 100 pF or 8x 50 pF caps in parallel for C15. This divides th; /archives//html/TenTec/2003-10/msg00321.html (7,407 bytes)
5. Re: [TenTec] Titan tuning drift on 160 meters (score: 1): Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>; Date: Fri, 10 Oct 2003 21:49:04 -0500; The problem is capacitor heating and using capacitors with a large temperature coefficient. Typical of general purpose capacitors. You need NPO or COG type dielectric, which are larger and more costl; /archives//html/TenTec/2003-10/msg00326.html (9,346 bytes)
6. Re: [TenTec] Titan tuning drift on 160 meters (score: 1): Author: Jim Miller <k4sqr@juno.com>; Date: Sat, 11 Oct 2003 08:23:41 -0400; Ken; Years ago the factory had to change doorknob vendors. I wound up with a Titan that would drop off as I tuned to 1500 watts, and stabilize around 900-1000 watts. Larry Worth, then Service Manager; /archives//html/TenTec/2003-10/msg00334.html (10,737 bytes)

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