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1. [AMPS] Plate Impedance (score: 1): Author: firson@hotmail.com (Firson Maryutenli); Date: Wed, 25 Apr 2001 17:51:08 +0700; In SSB Amplifier, plate current have variation following voice modulated, How to determine plate impedance with varation in current flow. de YD1BIH ___________________________________________________; /archives//html/Amps/2001-04/msg00520.html (6,751 bytes)
2. [AMPS] Plate Impedance (score: 1): Author: 2@vc.net (measures); Date: Wed, 25 Apr 2001 06:27:25 -0700; The moment of truth is the instant of peak cathode emission. cheers, Firson. - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@; /archives//html/Amps/2001-04/msg00524.html (6,672 bytes)
3. [Amps] Plate impedance (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 10 Apr 2006 01:17:39 -0400; All, I started reading through the RCA Radiotron Handbook this evening looking for where the factor of 1.8 is listed for calculating the plate impedance of a class AB amplifier, and I can not find it; /archives//html/Amps/2006-04/msg00132.html (7,277 bytes)
4. Re: [Amps] Plate impedance (score: 1): Author: R@contesting.com;Measures <r@somis.org>; Date: Mon, 10 Apr 2006 06:07:12 -0700; A factor of 1.8 is close enough. The exact factor is dependent on ZSAC, so there is no magic number written in stone. Rich Measures, 805.386.3734, AG6K, www.somis.org ________________________________; /archives//html/Amps/2006-04/msg00134.html (8,585 bytes)
5. Re: [Amps] Plate impedance (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Mon, 10 Apr 2006 15:17:03 +0200 (CEST); I seem to remember my RCA TT4 handbook listed the load impedance as the plate swing divided by Ib0, the quiescent plate current. A typo, obviously. 73 Peter G3RZP ____________________________________; /archives//html/Amps/2006-04/msg00135.html (6,939 bytes)
6. Re: [Amps] Plate impedance (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Mon, 10 Apr 2006 10:10:49 -0400; Rich: Pardon my ignorance, but what is ZSAC? - JimT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2006-04/msg00136.html (7,477 bytes)
7. Re: [Amps] Plate impedance (score: 1): Author: Bill Turner <dezrat@copper.net>; Date: Mon, 10 Apr 2006 07:19:58 -0700; ORIGINAL MESSAGE: ** REPLY SEPARATOR ** Correct me if I'm wrong, but isn't the factor - 1.8 or whatever - only a starting point to get the design close to the desired Q? As I understand it, if you ge; /archives//html/Amps/2006-04/msg00137.html (7,674 bytes)
8. Re: [Amps] Plate impedance (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Mon, 10 Apr 2006 15:29:31 +0100; Zero signal anode current. Interesting observation - on that side of the Atlantic shouldn't it be ZSPC? Steve _______________________________________________ Amps mailing list Amps@contesting.com ht; /archives//html/Amps/2006-04/msg00138.html (7,260 bytes)
9. Re: [Amps] Plate impedance (score: 1): Author: "J. Leon Pringle, Jr and Audrey S. Pringle" <pringle50@comcast.net>; Date: Mon, 10 Apr 2006 10:00:00 -0500; All. There is an excellent article published in Ham Radio Magazine dated September 1972 on Page 6 through page 22 by Irvin M. Hoff, W6FFC titled High-frequency power amplifier pi network design that; /archives//html/Amps/2006-04/msg00139.html (9,919 bytes)
10. Re: [Amps] Plate impedance (score: 1): Author: R@contesting.com;Measures <r@somis.org>; Date: Mon, 10 Apr 2006 08:04:58 -0700; A plate is a shallow container that humans eat from. Rich Measures, 805.386.3734, AG6K, www.somis.org _______________________________________________ Amps mailing list Amps@contesting.com http://list; /archives//html/Amps/2006-04/msg00140.html (8,507 bytes)
11. Re: [Amps] Plate impedance (score: 1): Author: R@contesting.com;Measures <r@somis.org>; Date: Mon, 10 Apr 2006 08:07:59 -0700; Q is set by the builder. RL divided by Q approximately determines XC1. Rich Measures, 805.386.3734, AG6K, www.somis.org _______________________________________________ Amps mailing list Amps@contesti; /archives//html/Amps/2006-04/msg00141.html (8,569 bytes)
12. Re: [Amps] Plate impedance (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 10 Apr 2006 11:18:28 -0400; Peter, In this edition of the Radiotron Designers Handbook, 3rd edition, (c) 1945, it says; (1) "The plate resistance (rp) is the rate of change of plate voltage with change of plate current, and the; /archives//html/Amps/2006-04/msg00142.html (9,081 bytes)
13. Re: [Amps] Plate impedance (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 10 Apr 2006 11:25:45 -0400; Rich, ** REPLY SEPARATOR ** I understand that as it will never be exact as there's too many variables involved. That's about like designing transformers. By the way, the old formulas in this edition; /archives//html/Amps/2006-04/msg00143.html (11,036 bytes)
14. Re: [Amps] Plate impedance (score: 1): Author: "Gary Smith" <wa6fgi@sbcglobal.net>; Date: Mon, 10 Apr 2006 09:21:47 -0700; Hi Leon and the group. Did some cursory checking, his 6 call appears to have been reissued, that individual exchanged for a call in the 4 area. My guess is Mr Hoff is a sk. 73, Gary...wa6fgi PS: are; /archives//html/Amps/2006-04/msg00144.html (11,848 bytes)
15. Re: [Amps] Plate Impedance (score: 1): Author: Xmitters@aol.com; Date: Mon, 10 Apr 2006 13:35:28 EDT; << All, I started reading through the RCA Radiotron Handbook this evening looking for where the factor of 1.8 is listed for calculating the plate impedance of a class AB amplifier, and I cannot find; /archives//html/Amps/2006-04/msg00146.html (13,346 bytes)
16. Re: [Amps] Plate impedance (score: 1): Author: "David C. Hallam" <dhallam@rapidsys.com>; Date: Mon, 10 Apr 2006 15:47:30 -0400; The formula given in RCA Transmitting Tube Manual TT-5 is Rp = 2(Eb - Ebmin)/Ibmax Where Eb = Plate (or anode) voltage at value chosen for operation Ebmin = Plate voltage at minimum of swing; for a t; /archives//html/Amps/2006-04/msg00147.html (10,281 bytes)
17. Re: [Amps] Plate Impedance (score: 1): Author: TexasRF@aol.com; Date: Mon, 10 Apr 2006 17:03:02 EDT; Jeff, 5400 ohms plate load flies into the face of what we have been calculating using the K factor stuff. 3000v/1A/1.8 is equal to 1666 ohms so one of your numbers is flawed. Using the other method,; /archives//html/Amps/2006-04/msg00148.html (14,247 bytes)
18. Re: [Amps] Plate Impedance (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 10 Apr 2006 19:10:13 -0400; Gerald, I just came in to check me e-mail and seen your post. I was wrong on that being peak plate current. That could have been something I read on the net as I was reading there on several websites; /archives//html/Amps/2006-04/msg00150.html (17,876 bytes)
19. Re: [Amps] Plate Impedance (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 10 Apr 2006 19:22:53 -0400; Gerald, Effective RF load resistance; 2 x (Eb - Ebmin) / Ibo Ibo = Zero signal plate current "Ibo should be between 1/6 and 1/10 of Ibmax found on the typical plate characteristics graph". "Determine; /archives//html/Amps/2006-04/msg00152.html (19,821 bytes)
20. Re: [Amps] Plate impedance (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 10 Apr 2006 19:45:21 -0400; Jim, Your correct. I thought it said plate impedance myself until I read what was in the book. What the formulas are about is the "Effective RF load resistance", and "Plate resistance". I have not ye; /archives//html/Amps/2006-04/msg00153.html (10,806 bytes)

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