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Total 62 documents matching your query.

1. [TenTec] Tuner (score: 1): Author: holladayfd@multipro.com (Frank Holladay); Date: Fri, 26 Jan 2001 08:45:17 -0600; Corn I am new to this reflector so hopefully this will get through. Isn't the function of a tuner to act as a variable impedence to provide a matched load to the transmitter? 73, Frank K4VMO -- FAQ o; /archives//html/TenTec/2001-01/msg00644.html (6,583 bytes)
2. [TenTec] Tuner (score: 1): Author: SEWATKINS@dgs.state.va.us (Sherrill WATKINS); Date: Fri, 26 Jan 2001 10:04:58 -0500; Hi Frank: Yes, that is one reason, but not the MAIN reason for using an antenna tuner. In my humble opinion , the most important reason is the tremendous bandwidth the tuner affords. With a properly; /archives//html/TenTec/2001-01/msg00646.html (7,082 bytes)
3. [TenTec] Tuner (score: 1): Author: jamesquick@home.com (James Quick); Date: Mon, 3 Jul 2000 18:37:26 -0400; I am looking for a Model 253 (I think) Ten-Tec automatic antenna. If you have one that you would like to part with or know anyone that has one please let me know. 73, Jim - N4ULE -- FAQ on WWW: http:; /archives//html/TenTec/2000-07/msg00012.html (6,467 bytes)
4. [TenTec] tuner (score: 1): Author: "ROD" <w3krq@dejazzd.com>; Date: Fri, 14 Jan 2011 11:47:34 -0500; I have built tuners in the past but today you need to find a good coil and good capacitors . Look for a good used tuner. you can get tuners today that have more than one output my tuner has 4, I use; /archives//html/TenTec/2011-01/msg00344.html (6,765 bytes)
5. [TenTec] Tuner (score: 1): Author: Walt Stewart <kb4srn@yahoo.com>; Date: Mon, 8 Jul 2013 12:46:51 -0400; I recently purchased a used 238 tuner. It will give me a perfect match on 40 meters with my 80 meter dipole, but I cannot get it to match the 80 meter dipole cut for 3800 down to the CW area. What am; /archives//html/TenTec/2013-07/msg00120.html (6,620 bytes)
6. Re: [TenTec] Tuner (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Mon, 08 Jul 2013 09:57:42 -0700; That's VERY surprising unless you're using high Z feedline (window line or open wire). , but I cannot get it to match the 80 meter dipole cut for 3800 down to the CW area. What am I doing wrong? It's; /archives//html/TenTec/2013-07/msg00121.html (7,794 bytes)
7. Re: [TenTec] Tuner (score: 1): Author: Richards <jrichards@k8jhr.com>; Date: Mon, 08 Jul 2013 15:42:31 -0400; What type and length of transmission line are you using? I presume this is a regular old half wave dipole, right? If so, I believe the text book suggests that a regular old half wave dipole tends to; /archives//html/TenTec/2013-07/msg00122.html (10,533 bytes)
8. Re: [TenTec] Tuner (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Mon, 8 Jul 2013 22:01:13 +0200; James, you are kind of close in your thinking, but wrong in how you explained it. Openwire does not make it easier to tune than coax would. The feedline has nothing to do with the ability to match th; /archives//html/TenTec/2013-07/msg00123.html (11,911 bytes)
9. Re: [TenTec] Tuner (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Mon, 08 Jul 2013 21:21:04 +0100; For the record, here's a Smith Chart that shows in the coloured areas those impedances which need the so-called "HighZ" L-match configuration: http://www.karinya.net/g3txq/temp/hiz_loz.png In the Gre; /archives//html/TenTec/2013-07/msg00124.html (8,792 bytes)
10. Re: [TenTec] Tuner (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Mon, 8 Jul 2013 22:42:45 +0200; Walt, I agree with Jim. The 238 will definitely match it, but the match point is probably very sharp and so far you have been tuning past it without noticing it. Here's what I suggest. Use an analyze; /archives//html/TenTec/2013-07/msg00125.html (9,811 bytes)
11. Re: [TenTec] Tuner (score: 1): Author: Stuart Rohre <rohre@arlut.utexas.edu>; Date: Mon, 08 Jul 2013 15:57:24 -0500; You are doing nothing wrong, the 3.8 MHz antenna is just too short to reach 3.5 MHz! You could add some loading wires on the ends of the dipole to work that part of the band, but it might affect the; /archives//html/TenTec/2013-07/msg00126.html (8,226 bytes)
12. Re: [TenTec] Tuner (score: 1): Author: Richards <jrichards@k8jhr.com>; Date: Mon, 08 Jul 2013 17:26:43 -0400; Oh... No, Stuart... THAT IS WAY TOO EASY! I cannot be that easy ! ;-) -- K8JHR -- You could add some loading wires on the ends of the dipole to work that part of the band, but it might affect the ope; /archives//html/TenTec/2013-07/msg00127.html (8,483 bytes)
13. Re: [TenTec] Tuner (score: 1): Author: kb4srn@yahoo.com; Date: Mon, 8 Jul 2013 14:36:13 -0700 (PDT); Thanks for the advice. The antenna is the old dipole fed with 8x coax. I did have a doublet up that was fed with ladder line in the past and it was great. Wife just doesn't like the idea of me cut; /archives//html/TenTec/2013-07/msg00128.html (12,351 bytes)
14. Re: [TenTec] Tuner (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Mon, 08 Jul 2013 14:42:31 -0700; While it has generally been my experience that antennas tend to tune more easily a bit above resonance than below, there is no good reason that a 229 or 238 should not match a dipole that resonates o; /archives//html/TenTec/2013-07/msg00129.html (8,459 bytes)
15. Re: [TenTec] Tuner (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Mon, 08 Jul 2013 22:56:01 +0100; At 3.5MHz, the SWR(50) of an 80m dipole cut for resonance at 3.8MHz could easily be 12:1 or higher. Depending on the length of the coax, that can present impedances at the tuner that will be well out; /archives//html/TenTec/2013-07/msg00130.html (8,863 bytes)
16. Re: [TenTec] Tuner (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Tue, 9 Jul 2013 00:14:42 +0200; You should be able to match it by adding additional capacitance to the rear of the 238. Like Jim, I always cut mine to about 3600 and have no trouble matching it across the upper portion of the band; /archives//html/TenTec/2013-07/msg00131.html (10,217 bytes)
17. Re: [TenTec] Tuner (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Mon, 08 Jul 2013 23:21:30 +0100; The problem is most acute when the length of the coax transforms the off-resonance feedpoint impedance to a low resistive value - for example around 6 Ohms for 45ft of Rg-8X; the tuner then doesn't h; /archives//html/TenTec/2013-07/msg00132.html (9,884 bytes)
18. Re: [TenTec] Tuner (score: 1): Author: Mike Bryce <prosolar@sssnet.com>; Date: Mon, 8 Jul 2013 18:31:36 -0400; Just wondering. How bad is the swr at the low end you are trying to use? Mike wb8vge Sent from my iPhone _______________________________________________ TenTec mailing list TenTec@contesting.com http; /archives//html/TenTec/2013-07/msg00133.html (8,437 bytes)
19. Re: [TenTec] Tuner (score: 1): Author: Stuart Rohre <rohre@arlut.utexas.edu>; Date: Mon, 08 Jul 2013 18:48:13 -0500; Hi there, You are candidate for my tip of the week. If you have a window in the shack on the same side as the rig/ desk, you simply need to run the window line, (insulated) under the sash and close t; /archives//html/TenTec/2013-07/msg00134.html (9,744 bytes)
20. Re: [TenTec] Tuner (score: 1): Author: "Robert Mcgraw" <rmcgraw@blomand.net>; Date: Mon, 8 Jul 2013 20:52:41 -0500 (CDT); I trust it is a coax fed dipole. My 80M dipole has a 1:1 SWR with the tuner in bypass at 3800. To make it match at 3550 I use 11.5 turns of inductance counted from full stop at the left and then coun; /archives//html/TenTec/2013-07/msg00135.html (8,957 bytes)

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