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Total 6 documents matching your query.

1. [TenTec] 229B tuner: Slight upward creep of SWR (score: 1): Author: Peter Klein <boulanger.croissant@gmail.com>; Date: Sat, 21 Jul 2018 00:26:12 -0700; I've just noticed something interesting about my Ten Tec 229B tuner. It happens on 80m-30m, where the center switch is in positions Lo2 - Lo5 and various fixed capacitors are switched into the circu; /archives//html/TenTec/2018-07/msg00067.html (8,502 bytes)
2. Re: [TenTec] 229B tuner: Slight upward creep of SWR (score: 1): Author: Bob McGraw K4TAX <rmcgraw@blomand.net>; Date: Sat, 21 Jul 2018 08:25:35 -0500; Your description is typical of some component or components heating and changing value. This is not uncommon with this tuner, but usually with higher power. Three areas of concern are; (a) the 4; /archives//html/TenTec/2018-07/msg00068.html (11,710 bytes)
3. Re: [TenTec] 229B tuner: Slight upward creep of SWR (score: 1): Author: MadScientist <dukeshifi@comcast.net>; Date: Sat, 21 Jul 2018 10:51:51 -0500; Thats a common problem when ceramic capacitors become a major part of the tuned circuit because ceramic capacitors (especially doorknobs) have very high TCC (temperature coefficient of capacitance).; /archives//html/TenTec/2018-07/msg00069.html (13,225 bytes)
4. Re: [TenTec] 229B tuner: Slight upward creep of SWR (score: 1): Author: Peter Klein <boulanger.croissant@gmail.com>; Date: Sun, 22 Jul 2018 23:09:22 -0700; Thanks for all the good info. One thing though. The SWR creep may be a clear indication that I am using the wrong balun, but that aint the case. I am using a 1:1 Guanella balun, 17 turns RG-58 on wha; /archives//html/TenTec/2018-07/msg00072.html (8,282 bytes)
5. Re: [TenTec] 229B tuner: Slight upward creep of SWR (score: 1): Author: Bob McGraw K4TAX <rmcgraw@blomand.net>; Date: Mon, 23 Jul 2018 06:46:32 -0500; Your balun is OK. The ceramic disk capacitors are heating and changing value. Usually they will return to near the original value when they cool. As to damage, at some temp they will go "bang". As lo; /archives//html/TenTec/2018-07/msg00073.html (9,460 bytes)
6. Re: [TenTec] 229B tuner: Slight upward creep of SWR (score: 1): Author: Byron Cordes via TenTec <tentec@contesting.com>; Date: Mon, 23 Jul 2018 12:57:07 -0500; I would be surprised if 100watts would be making the caps change! I think it would be a common mode problem. I would try to change ladder line length a little and if it a vertical antenna maybe more; /archives//html/TenTec/2018-07/msg00077.html (10,992 bytes)

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