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1. [Amps] DC Blocking Capacitor (score: 1): Author: Bob Easterbrooks <k6jqa@jasonsplace.info>; Date: Tue, 26 Apr 2005 12:26:59 -0700; Gentleman, What determines the capacitive value of the DC blocking capacitor used in a convential shunt fed PI, and can the same rules apply to a simple link coupled tank circuit? I thank you in adva; /archives//html/Amps/2005-04/msg00559.html (6,255 bytes)
2. Re: [Amps] DC Blocking Capacitor (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Tue, 26 Apr 2005 16:53:43 -0500; To avoid affecting the amplifier's tuning and matching characteristics, the blocking capacitor should have a low impedance at all operating frequencies. It's reactance at the LOWEST operating frequen; /archives//html/Amps/2005-04/msg00560.html (8,328 bytes)
3. Re: [Amps] DC Blocking Capacitor (score: 1): Author: R@contesting.com;Measures <r@somis.org>; Date: Tue, 26 Apr 2005 15:26:26 -0700; The value of the DC blocking cap is seeming less critical than is commonly thought. As I understand it, in most HF amplifiers, 200pF is enough. However, the I-handling ability become important on the; /archives//html/Amps/2005-04/msg00563.html (7,395 bytes)
4. Re: [Amps] DC Blocking Capacitor (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Tue, 26 Apr 2005 18:17:05 -0500; Amen, "R"! I think that so many guys over the years used whatever they had in their junk boxes that looked big enough that a proliferation took place. Sort of like parasitic suppressers...if they wor; /archives//html/Amps/2005-04/msg00565.html (8,224 bytes)
5. Re: [Amps] DC Blocking Capacitor (score: 1): Author: R@contesting.com;Measures <r@somis.org>; Date: Tue, 26 Apr 2005 19:02:30 -0700; thanks, Phil. Tom Rauch said that a friend inadvertently used a 100pF D. C. blocker in a homebrew amp, and, when the mistake was discovered and corrected, it worked no better with 1000pF than with 10; /archives//html/Amps/2005-04/msg00567.html (9,895 bytes)
6. Re: [Amps] DC Blocking Capacitor (score: 1): Author: GGLL <nagato@arnet.com.ar>; Date: Tue, 26 Apr 2005 23:52:10 -0300; Plate resistance equals VDC/(k*Ia), with k=1.8 for AB2 GG, is this correct?. Best regards Guillermo - LU8EYW. Phil Clements escribió: _______________________________________________ Amps maili; /archives//html/Amps/2005-04/msg00569.html (9,329 bytes)
7. Re: [Amps] DC Blocking Capacitor (score: 1): Author: Karl-Arne Markström <sm0aom@telia.com>; Date: Wed, 27 Apr 2005 07:50:33 +0200; I wonder if you may have gotten the numbers "backwards"... In my understanding of AC circuits, the requirement for the reactance of the blocking capacitor is to decrease with decreasing plate load im; /archives//html/Amps/2005-04/msg00570.html (12,243 bytes)
8. Re: [Amps] DC Blocking Capacitor (score: 1): Author: Patrick EGLOFF <pegloff@gmail.com>; Date: Wed, 27 Apr 2005 08:08:54 +0200; While we are talking about blocking caps. I'm collecting parts to build my 2m amplfier using a 4CX1500B. I have 2 sort op caps and would like to know if they are OK for use on 2m ? I have 2 of each.; /archives//html/Amps/2005-04/msg00571.html (8,023 bytes)
9. Re: [Amps] DC Blocking Capacitor (score: 1): Author: G3rzp@aol.com; Date: Wed, 27 Apr 2005 02:33:51 EDT; Back in the 'good ole days' of AM, I seem to remember that you never went above 1000pF, even at 160, because it bypassed the audio signal applied to the plate for modulation. I happen to have a 1200p; /archives//html/Amps/2005-04/msg00572.html (7,448 bytes)
10. Re: [Amps] DC Blocking Capacitor (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Wed, 27 Apr 2005 02:16:08 -0500; I'm old, but not that old, Peter, but I think you speak of suseptance, or the ability to pass current. In an ideal capacitor with no heat losses it is the reciprocal of reactance. This has been calle; /archives//html/Amps/2005-04/msg00573.html (8,646 bytes)
11. Re: [Amps] DC Blocking Capacitor (score: 1): Author: G3rzp@aol.com; Date: Wed, 27 Apr 2005 03:57:57 EDT; This has been called several things over the years; suseptance, admittance, and conductance; measured in siemens or sometimes mhos. Conductance G is the reciprocal of Resistance R Susceptance B is th; /archives//html/Amps/2005-04/msg00574.html (8,548 bytes)
12. Re: [Amps] DC Blocking Capacitor (score: 1): Author: Gary Schafer <garyschafer@comcast.net>; Date: Wed, 27 Apr 2005 11:57:27 -0400; Phil, Am I looking at this backwards or are you? Thanks Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/a; /archives//html/Amps/2005-04/msg00576.html (10,437 bytes)

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