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1. [AMPS] Power out indicator (score: 1): Author: barrie99@marsweb.com (barrie99@marsweb.com); Date: Tue, 12 Feb 2002 17:24:45 -0700; Hello: I'm building a 160M only link-coupled antenna tuner. Will have a Bird wattmeter on the input side, but would like to have a "relative power output" indicator on the output side (600 ohm balanc; /archives//html/Amps/2002-02/msg00121.html (8,232 bytes)
2. [AMPS] Power out indicator (score: 1): Author: k2xx@swva.net (Joe Giacobello, K2XX); Date: Tue, 12 Feb 2002 19:56:31 -0500; Barrie, an easy way out is to use an RF ammeter in one of the legs of open wire line and simply tune for maximum RF current. If you're running a KW, you'll probably need a 0-10 A meter. 73, Joe -- FA; /archives//html/Amps/2002-02/msg00122.html (9,082 bytes)
3. [AMPS] Power out indicator (score: 1): Author: 2@mail.vcnet.com (Rich...); Date: Tue, 12 Feb 2002 23:21:05 -0800; ? Such an indicator is not very useful because a g-g amplifier is tuned for max out with max drive using its built in RF relative output meter. Tuners need only a reflectometer to indicate when zero; /archives//html/Amps/2002-02/msg00124.html (9,328 bytes)
4. [AMPS] Power out indicator (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 18 Feb 2002 09:50:45 -0000; Sri for delay - been away. Generally speaking, I agree with Rich. However, some tuner circuits can be tuned up to have a very low input SWR and no output, with the tuner losses being transformed up t; /archives//html/Amps/2002-02/msg00180.html (9,156 bytes)
5. [AMPS] Power out indicator (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 18 Feb 2002 06:35:39 -0500; I hear that rumor repeated, but I've never been able to find that in any tuner I have ever seen. What does happen is there is a smooth and gradual reduction in efficiency as the Q is made higher, bu; /archives//html/Amps/2002-02/msg00182.html (9,594 bytes)
6. [AMPS] Power out indicator (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Mon, 18 Feb 2002 11:47:55 -0000; The tuner for the British Army D11/D13 tx's could certainly do it. I've seen it in a Z match, too. Not often - depends on the load. I don't like the Z match anyway. Especially in a Z match - which is; /archives//html/Amps/2002-02/msg00183.html (9,068 bytes)
7. [AMPS] Power out indicator (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 18 Feb 2002 08:09:41 -0800; tuned ? an example of such a tuner, please ? ? I had a link-coupled tuner (a Johnson Matchbox). It had about 1/15 of the matching range of a garden-variety balanced L-network, so I sold it cheap. ch; /archives//html/Amps/2002-02/msg00187.html (9,510 bytes)
8. [AMPS] Power out indicator (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 18 Feb 2002 08:09:42 -0800; ? Amen, Tom - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative request; /archives//html/Amps/2002-02/msg00188.html (9,266 bytes)
9. [AMPS] Power out indicator (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 18 Feb 2002 08:09:44 -0800; ? i have yet to see a tuner that did not achive a match when adjusted with a reflectometer. cheers, Peter - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on W; /archives//html/Amps/2002-02/msg00189.html (9,671 bytes)
10. [AMPS] Power out indicator (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Mon, 18 Feb 2002 17:02:21 -0000; I have managed to melt solder etc in maladjusted ATUs with 100W power levels.The advice about lamp or thermocouple meters in the feedline is good, only needs to be used when setting up. Once characte; /archives//html/Amps/2002-02/msg00190.html (10,980 bytes)
11. [AMPS] Power out indicator (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 18 Feb 2002 21:27:05 -0500; With a reasonable load connected? No way! Perhaps you are confusing an unwanted self-resonance in a roller with the tuner "loading into itself". The reduction in efficiency is so gradual and slight; /archives//html/Amps/2002-02/msg00191.html (9,264 bytes)
12. [AMPS] Power out indicator (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Tue, 19 Feb 2002 07:15:34 -0000; That an input match can be achieved is not in dispute. When the input match is achieved, there should be output, and with some tuner circuits, that may not always be the case. In other words, two mat; /archives//html/Amps/2002-02/msg00194.html (9,554 bytes)
13. [AMPS] Power out indicator (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Tue, 19 Feb 2002 08:02:46 -0000; It's quite easy in a Z match, although a lot depends on what you define as a 'reasonable load'. Think about one thing: if a Z match is so good, why are so many of the commercial tuners T or L network; /archives//html/Amps/2002-02/msg00196.html (10,198 bytes)
14. [AMPS] Power out indicator (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Tue, 19 Feb 2002 09:50:06 -0000; --Original Message-- From: Peter Chadwick <Peter.Chadwick@zarlink.com> To: amps <amps@contesting.com>; 'W8JI@contesting.com' <W8JI@contesting.com> To: <amps@contesting.com> Date: 19 February 2002 08:; /archives//html/Amps/2002-02/msg00197.html (9,161 bytes)
15. [AMPS] Power out indicator (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Tue, 19 Feb 2002 04:36:11 -0800; To: <amps@contesting.com> working Q Yes, you are correct, Steve. cheers - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/; /archives//html/Amps/2002-02/msg00198.html (8,941 bytes)
16. [AMPS] Power out indicator (score: 1): Author: Peter.Chadwick@zarlink.com (Peter Chadwick); Date: Tue, 19 Feb 2002 13:06:39 -0000; Don't follow that one. In the L network, the Q is fixed by the impedance transformation. In the pi or the T (one of which is the dual of the other), having the three variables allows Q to be a chosen; /archives//html/Amps/2002-02/msg00199.html (8,425 bytes)
17. [AMPS] Power out indicator (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Tue, 19 Feb 2002 13:59:10 -0000; here - Maybe it's in the definition, but I think you can't have any Q you choose in a pi network - isn't there a minimum value? If you plot the matching on a Smith chart, and add some constant Q curv; /archives//html/Amps/2002-02/msg00200.html (9,066 bytes)
18. [AMPS] Power out indicator (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Tue, 19 Feb 2002 20:01:06 -0500; Looking at a typical inductor Q=300 and capacitor Q=5000 matching 50 ohms to 1000 ohms with 1500 watts on 1.83 MHz: L network Qeff=4.36 C=380pF L=18.96uH and loss = 25.7watts T network Qeff=4.7 C=38; /archives//html/Amps/2002-02/msg00204.html (9,879 bytes)
19. [AMPS] Power out indicator (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Wed, 20 Feb 2002 07:32:04 -0000; I agree there's little doubt that the L network rarely has a significant advantage compared with the tuning flexibility of the others. Correcting a previous comment of mine, where there are reactive; /archives//html/Amps/2002-02/msg00206.html (8,872 bytes)
20. [AMPS] Power out indicator (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Wed, 20 Feb 2002 04:32:10 -0800; To: <amps@contesting.com> ? Advantages of the L-netork are: 1. lowest circulating current through the inductance -- i. e., the reactance with the most potential for power loss. 2. ideally suited for; /archives//html/Amps/2002-02/msg00207.html (9,943 bytes)

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