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1. [Amps] Line Sections As Plate Lines (score: 1): Author: JMLTINC@aol.com; Date: Thu, 23 Sep 2004 10:06:58 -0400; Hi QRO gurus - Let's talk 1/2wl plate lines. If you check out PA3CSG's website @ www.qsl.net/pa3csg , or PA7TA's site @ http://www.pa7ta.com/144MHz_RF-Deck.htm , the plate lines on their 2 meter, GS3; /archives//html/Amps/2004-09/msg00425.html (7,084 bytes)
2. Re: [Amps] Line Sections As Plate Lines (score: 1): Author: jeff millar <wa1hco@adelphia.net>; Date: Thu, 23 Sep 2004 13:08:51 -0400; The plate lines are not 1/4 or 1/2 wave long because the resonance and matching has to include the effects of the tuning capacitor and output coupling capacitor. This effect shows up well on a smith; /archives//html/Amps/2004-09/msg00428.html (8,644 bytes)
3. [Amps] Line Sections As Plate Lines (score: 1): Author: craxd <craxd1@ezwv.com>; Date: Thu, 23 Sep 2004 14:14:39 -0400; John, I couldn't see where it said the dimension your giving for the 3/10", 1/4 wave plate line. I tried to look on the QSL link and it would refuse the connection like the site was down. The other l; /archives//html/Amps/2004-09/msg00430.html (7,057 bytes)
4. Re: [Amps] Line Sections As Plate Lines (score: 1): Author: craxd <craxd1@ezwv.com>; Date: Thu, 23 Sep 2004 19:08:23 -0400; John, I read that and your correct, 53 cm is 20.86614173". I'm thinking they may have just rounded off the number to that, I'm not sure. It's very likely that's what they done as it happens a lot whe; /archives//html/Amps/2004-09/msg00432.html (8,804 bytes)
5. Re: [Amps] Line Sections As Plate Lines (score: 1): Author: jeff millar <wa1hco@adelphia.net>; Date: Thu, 23 Sep 2004 19:15:22 -0400; I had a chance to look at the web sites. The PA3CSG design consists of a "1/2" wave line load at both ends, tube output C at one end and the tune and coupling C at the other end. The low impedance mi; /archives//html/Amps/2004-09/msg00434.html (8,983 bytes)
6. Re: [Amps] Line Sections As Plate Lines (score: 1): Author: jeff millar <wa1hco@adelphia.net>; Date: Thu, 23 Sep 2004 19:19:01 -0400; Any coincidence between 1/4 wave in free space and the actual length of the 1/2 wave line is purely an accident of the numbers. The line is best modeled as an inductor to with caps at each end that r; /archives//html/Amps/2004-09/msg00435.html (9,319 bytes)
7. Re: [Amps] Line Sections As Plate Lines (score: 1): Author: craxd <craxd1@ezwv.com>; Date: Thu, 23 Sep 2004 23:32:34 -0400; Jeff, It can also be affected by the way the stripline is mounted, or how close it is to the surrounding structure. That's what I was thinking they were probably taking into consideration. Just like; /archives//html/Amps/2004-09/msg00437.html (8,839 bytes)
8. [Amps] Line Sections As Plate Lines (score: 1): Author: JMLTINC@aol.com; Date: Fri, 24 Sep 2004 08:56:07 -0400; Hi again guys Sorry if I was not clear about my question. Let me try it from a different angle. Specifically: How do you calculate the length for a 1/2wl plate line???? That is, what is the formula?; /archives//html/Amps/2004-09/msg00441.html (7,362 bytes)
9. Re: [Amps] Line Sections As Plate Lines (score: 1): Author: jeff millar <wa1hco@adelphia.net>; Date: Fri, 24 Sep 2004 19:30:17 -0400; The line is not physically 1/2 wave long because it's loaded at both ends by capacitance. I use the RF Dude's smith chart program (or the Linux one by Lapo Pieri, IK5NAX) and enter some starting valu; /archives//html/Amps/2004-09/msg00447.html (11,343 bytes)
10. Re: [Amps] Line Sections As Plate Lines (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Sun, 06 Mar 2005 04:33:24 +0000; I assume you mean Ctotal is 14.8pF, giving a reactance of 74 Ohms. Anyway, forget the numbers - a general formula is better. I assume the tube is at one end of a line, and the other end is a high imp; /archives//html/Amps/2005-03/msg00141.html (11,442 bytes)
11. Re: [Amps] Line Sections As Plate Lines (score: 1): Author: jeff millar <wa1hco@adelphia.net>; Date: Sun, 06 Mar 2005 00:17:52 -0500; _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2005-03/msg00143.html (15,025 bytes)

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