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Total 26 documents matching your query.

1. [TenTec] Tuning Amp on 17 meters (score: 1): Author: Richards <jrichards@k8jhr.com>; Date: Wed, 17 Apr 2013 15:52:20 -0400; Greetings TT Mavens. Background - I rarely work 17 meters SSB with my Omni VII. Today, I reworked my 10 meter vertical ground plane antenna into a 17 meter ground plane which measures about 1.3:1 SWR; /archives//html/TenTec/2013-04/msg00165.html (9,039 bytes)
2. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: "Lee WA3FIY" <wa3fiy@radioadv.com>; Date: Wed, 17 Apr 2013 16:50:50 -0400; When operating barefoot and with the tuner in line, you have a near perfect match as expected. The O VII sees the tuner directly. When you insert the Centurion in line, the O VII sees the input imped; /archives//html/TenTec/2013-04/msg00166.html (11,399 bytes)
3. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: "Lee WA3FIY" <wa3fiy@radioadv.com>; Date: Wed, 17 Apr 2013 16:54:41 -0400; Ooooops..... I missed the point that you are not using the tuner with this antenn because the match is so good. I think that is the case. The balance of what I said still applies though. With the amp; /archives//html/TenTec/2013-04/msg00167.html (10,809 bytes)
4. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: PC Anderson <xtraham58@hotmail.com>; Date: Wed, 17 Apr 2013 16:55:31 -0400; My understanding is that the auto tuner in the exciter should be OFF when driving the Amp. The input impedance changes with drive, so I've been told. Therefore, I allow the auto tuner to tune the ant; /archives//html/TenTec/2013-04/msg00168.html (10,691 bytes)
5. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Wed, 17 Apr 2013 14:06:32 -0700; Measured how? By the rig, or by the amp? The SWR indicator in the RIG will measure the match between the rig and the amp. The SWR indicator in the AMP will measure the match between the rig and the f; /archives//html/TenTec/2013-04/msg00169.html (11,722 bytes)
6. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Wed, 17 Apr 2013 14:10:02 -0700; I meant to say that the SWR indicator in the AMP will measure the match between the AMP and the feedline (or between the amp and the antenna tuner, if the tuner is in the circuit). 73, Jim K9YC _____; /archives//html/TenTec/2013-04/msg00170.html (7,910 bytes)
7. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: Richards <jrichards@k8jhr.com>; Date: Wed, 17 Apr 2013 19:56:53 -0400; Measured how? By the rig, or by the amp? The SWR indicator in the RIG will measure the match between the rig and the amp. The SWR indicator in the AMP will measure the match between the rig and the; /archives//html/TenTec/2013-04/msg00173.html (14,131 bytes)
8. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: Richards <jrichards@k8jhr.com>; Date: Wed, 17 Apr 2013 20:02:17 -0400; I meant to say that the SWR indicator in the AMP will measure the match between the AMP and the feedline (or between the amp and the antenna tuner, if the tuner is in the circuit). _________________; /archives//html/TenTec/2013-04/msg00174.html (9,315 bytes)
9. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: Richards <jrichards@k8jhr.com>; Date: Wed, 17 Apr 2013 20:03:33 -0400; Right. It is. The auto tuner mentioned is the Palstar AT-AUTO -- but I have it bypassed as the antenna is a resonant ground plane. ' The input impedance changes with drive, so I've been told. Therefo; /archives//html/TenTec/2013-04/msg00175.html (8,888 bytes)
10. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Wed, 17 Apr 2013 18:16:54 -0700; That's a good move. The SWR indicated by the rig when you drive the amp shows whatever mismatch there might be between the rig nd the amp. It's quite common for there to be a moderate mismatch, but b; /archives//html/TenTec/2013-04/msg00176.html (10,773 bytes)
11. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Thu, 18 Apr 2013 10:51:47 +0200; "So many of my friends think the antenna is "resonant" when SWR is lowest, and that is all they ever look at." People who think like that are praying to false Gods. Shame on them. You will almost nev; /archives//html/TenTec/2013-04/msg00180.html (8,658 bytes)
12. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Thu, 18 Apr 2013 09:12:37 -0700; On 4/18/2013 1:51 AM, Rick - DJ0IP / NJ0IP wrote: It is very easy to confirm that with all of your antennas, using your RigExpert AA-230, but NOT in SWR mode. Switch it to Phase or one of the R/X/ mo; /archives//html/TenTec/2013-04/msg00181.html (10,239 bytes)
13. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Thu, 18 Apr 2013 20:37:36 +0200; Jim, You are 100% correct but in a case like James has, I think you are kind of splitting hairs. "If" the antenna is a monoband and fairly close to being 50 Ohms resistive, there won't be much transf; /archives//html/TenTec/2013-04/msg00182.html (11,528 bytes)
14. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: Richards <jrichards@k8jhr.com>; Date: Thu, 18 Apr 2013 21:17:58 -0400; Yes... you guys are both on track, and reinforce my observation that SWR is never the whole story. I discovered very few articles attempting to explain the big picture about antenna measurements. The; /archives//html/TenTec/2013-04/msg00183.html (10,438 bytes)
15. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: "Robert Mcgraw" <rmcgraw@blomand.net>; Date: Thu, 18 Apr 2013 20:41:37 -0500 (CDT); What ever happened to using the old fashion Millen Grid Dip Meter or the Heathkit Tunner Dipper to find resonance? I can also use my MFJ 259 antenna bridge with a 2 turn loop on the input to find the; /archives//html/TenTec/2013-04/msg00184.html (13,901 bytes)
16. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: Richards <jrichards@k8jhr.com>; Date: Fri, 19 Apr 2013 04:09:33 -0400; Once again, you say what I am driving at better than I can. I suspect most hams want an easy, quick solution they can wrap their heads around. Impedance, reactance, inductance, capacitance, SWR, retu; /archives//html/TenTec/2013-04/msg00186.html (13,223 bytes)
17. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Fri, 19 Apr 2013 11:34:27 +0200; James, Ask you local Elmer to explain what he meant when he said the analyzer doesn't really tell us impedance. Perhaps there is a word missing in that sentence. Like Jim told us yesterday, the analy; /archives//html/TenTec/2013-04/msg00187.html (9,891 bytes)
18. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: Richards <jrichards@k8jhr.com>; Date: Fri, 19 Apr 2013 07:17:00 -0400; Ask you local Elmer to explain what he meant when he said the analyzer doesn't really tell us impedance. Perhaps there is a word missing in that sentence. and mathematically calculate the true impeda; /archives//html/TenTec/2013-04/msg00190.html (10,034 bytes)
19. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Fri, 19 Apr 2013 08:51:02 -0700; You're an attorney, right? Did you learn what you needed to do that in an easy, quick solution that you could wrap your head around? :) There is a lot to learn, and it takes serious time and effort t; /archives//html/TenTec/2013-04/msg00191.html (10,198 bytes)
20. Re: [TenTec] Tuning Amp on 17 meters (score: 1): Author: Stuart Rohre <rohre@arlut.utexas.edu>; Date: Fri, 19 Apr 2013 14:42:10 -0500; Taken with my previous post, just remember this about SWR and resonance. Resonance is just the frequency where the inductive reactance cancels the capacitive reactance, BUT, some of the total may not; /archives//html/TenTec/2013-04/msg00193.html (9,882 bytes)

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