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41. [AMPS] Another arc question (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sat, 9 May 1998 19:31:09 +0100; [brief snip] Yes, we agree on that. We agree on that, too. Carl, we'll have to stop agreeing like this! People will begin to talk. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' column; /archives//html/Amps/1998-05/msg00129.html (11,730 bytes)
42. [AMPS] Another arc question (score: 1): Author: measures@vc.net (Rich Measures); Date: Sat, 9 May 98 12:29:19 -0800; When L is in parallel with R, admittance Is the name of the game. When L is in series with R, impedance Is the name of the game. .....not the definition of Rp in Wes' measurements. However, when an; /archives//html/Amps/1998-05/msg00130.html (12,993 bytes)
43. [AMPS] Another arc question (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 10 May 1998 01:20:57 +0100; Not correct: when L and/or C and/or R are connected in parallel, there is NO automatic change into susceptance and conductance. These admittance parameters are only an alternative, optional route thr; /archives//html/Amps/1998-05/msg00134.html (13,913 bytes)
44. [AMPS] Another arc question (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Sat, 9 May 98 19:50:41 -0500; This is correct, Ian. There are times when using admittance parameters makes the mathematics easier. This is especially true when designing matching networks, particularly with a Smith Chart. Howeve; /archives//html/Amps/1998-05/msg00135.html (9,793 bytes)
45. [AMPS] Another arc question (score: 1): Author: measures@vc.net (Rich Measures); Date: Sat, 9 May 98 20:02:16 -0800; In a parallel circuit, E is constant, and I is variable. In a series circuit, I is constant and E is variable. The "normal units" are different. How could Wes' have possibly measured 166 ohms of Rp; /archives//html/Amps/1998-05/msg00138.html (16,926 bytes)
46. [AMPS] Another arc question (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Sun, 10 May 1998 06:56:08 +0100; Again, sorry for joining in late. snip Bear in mind that any design of anode lead suppressor can only work given a low(ish) impedance path to ground at the tuning network. If by resonance or design t; /archives//html/Amps/1998-05/msg00140.html (9,915 bytes)
47. [AMPS] Another arc question (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 10 May 1998 12:23:42 +0100; They don't have to be. The choice between working in impedance and admittance units is completely optional, and based solely on convenience. Easily - the effect is due to a small series lead inductan; /archives//html/Amps/1998-05/msg00142.html (12,146 bytes)
48. [AMPS] Another arc question (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 10 May 98 09:30:50 -0800; It is easily seen that Wes also made separate measurements for the various suppressor inductors alone, without a shunt R, and that he measured Rp at each of the various test frequencies. If, as you; /archives//html/Amps/1998-05/msg00144.html (12,104 bytes)
49. [AMPS] Another arc question (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Sun, 10 May 1998 19:42:16 +0100; Because the coil has finite Q. If you take any measured Lp value from the table, convert to reactance at the measurement frequency, and multiply by the measured Q, there's the Rp value. The additiona; /archives//html/Amps/1998-05/msg00146.html (12,793 bytes)
50. [AMPS] Another arc question (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Mon, 11 May 1998 06:52:29 +0100; big snip In a parallel circuit, lowering R reduces Q. If the suppressor has a reasonable path to ground at the matching circuit end, then it appears in parallel with whatever the valve looks like fro; /archives//html/Amps/1998-05/msg00150.html (9,286 bytes)
51. [AMPS] Another arc question (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 11 May 98 00:12:40 -0800; True, however, there's a bit more to designing a VHF-suppressor than Q. It seems to me that an optimal suppressor design divides the VHF signal fairly equally between suppressor R (Rs) and the suppr; /archives//html/Amps/1998-05/msg00151.html (9,569 bytes)
52. [AMPS] Another arc question (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Mon, 11 May 1998 09:58:34 +0100; Actually the suppressor appears in series with the stray inductance that is causing the VHF resonance, and it's that [combination] that appears in parallel across the valve/tube and its output capaci; /archives//html/Amps/1998-05/msg00153.html (10,992 bytes)
53. [AMPS] Another arc question (score: 1): Author: ggeurts@amp.com (Geurts, Gerard); Date: Mon, 11 May 1998 13:36:56 +0100; A true story, draw your own conclusions. For some reason I remembered this when I came into the office this morning and had a look through the e-mails that came in over the weekend: About twelve year; /archives//html/Amps/1998-05/msg00154.html (9,904 bytes)
54. [AMPS] Another arc question (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 11 May 98 09:12:30 -0800; I'd call this necessary inductance because it is necessary if one is to conduct current from the tank to the anode. The equivalent Impedance of the suppressor does not connect to chassis-gnd, instea; /archives//html/Amps/1998-05/msg00155.html (12,214 bytes)
55. [AMPS] Another arc question (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 11 May 98 12:25:50 -0800; I ran into essentially the same phenomenon during the grate vhf suppressor debate, Gerard. Mr. Rauch stated that it really didn't matter whether a suppressor-inductor (Ls) was made from copper-wire; /archives//html/Amps/1998-05/msg00159.html (10,782 bytes)
56. [AMPS] Another arc question (score: 1): Author: w4eto@rmii.com (Richard W. Ehrhorn); Date: Tue, 12 May 1998 12:45:18 -0600; Hi Ian... A real pleasure to read your cleanly and clearly presented postings using actual algebra to calculate meaningful, real (well, actually complex I guess) results. But if you aren't careful yo; /archives//html/Amps/1998-05/msg00182.html (8,582 bytes)
57. [AMPS] Another arc question (score: 1): Author: measures@vc.net (Rich Measures); Date: Sat, 16 May 98 15:33:02 -0800; You could be right, Mr. Willis. Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrativ; /archives//html/Amps/1998-05/msg00296.html (8,177 bytes)

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