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81. [AMPS] parasitic suppressors (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 16 Dec 97 07:20:54 -0800; to However, most builders protect the grid current meter shunt resistor with glitch diodes, the peak potential across the grid current shunt R during an anode/grid arc would be roughly 1.5V -- which; /archives//html/Amps/1997-12/msg00310.html (15,636 bytes)
82. [AMPS] parasitic suppressors (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Tue, 16 Dec 1997 22:41:23 +0000; OK, we're nearly in agreement. However, if the grid current meter is damaged, it is clear that the shunt and/or the diode didn't do the job. A surge of say 50A comes up through the grid meter shunt,; /archives//html/Amps/1997-12/msg00311.html (12,999 bytes)
83. [AMPS] parasitic suppressors (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 16 Dec 97 17:22:19 -0800; when grid, amount case, flows to I have never seen 3A/200a-pk diodes fail to protect a grid current meter. If the designer used flimsy diodes, which failed to protect the meter, that is a separate i; /archives//html/Amps/1997-12/msg00312.html (12,418 bytes)
84. [AMPS] parasitic suppressors (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 17 Dec 1997 08:58:22 +0000; That isn't the dominant time constant in a near-crowbar short. If the arc voltage is about 50V and the current is about 50A, R is on the order of one ohm, so R*C is a few tens of microseconds. Theref; /archives//html/Amps/1997-12/msg00316.html (8,753 bytes)
85. [AMPS] Parasitic suppressors (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 1 Sep 1997 14:25:12 +0000; To: <amps@contesting.com> The problem is the change from a pure reactance to dominant resistance takes place too slowly Lars. It might work if the parasitic was very widely separated from the operat; /archives//html/Amps/1997-09/msg00011.html (8,142 bytes)
86. [AMPS] Parasitic suppressors (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 2 Sep 1997 06:06:42 +0000; To: <amps@contesting.com> To: <amps@contesting.com> -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problem; /archives//html/Amps/1997-09/msg00027.html (8,386 bytes)
87. [AMPS] parasitic suppressors (score: 1): Author: Peter.Chadwick@gpsemi.com (Peter Chadwick); Date: Tue, 9 Sep 1997 15:12:59 +0100; Looking at the N7WS figures, the thing that strikes me is the way the shunt resistance is increasing on the nichrome resisitors with frequency. If you model it as a perfect inductor with a constant s; /archives//html/Amps/1997-09/msg00192.html (7,844 bytes)
88. [AMPS] parasitic suppressors (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 9 Sep 97 11:29:27 -0800; It might be a good idea to provide a low L path between the grid terminal on the socket, the grid termination R and RF-ground. The reason: the tube has feedback C between the anode and the grid. A l; /archives//html/Amps/1997-09/msg00205.html (7,479 bytes)
89. [AMPS] Parasitic suppressors (score: 1): Author: lars.harlin@pocab.se (Lars Harlin); Date: Sun, 31 Aug 1997 07:08:12 +0200; Have followed the discussions abt VHF parasitics on the reflector and other media. Has anyone tried using ferrit in a suppressor? Lars / SM3BDZ -- FAQ on WWW: http://www.contesting.com/ampfaq.html Su; /archives//html/Amps/1997-08/msg00249.html (7,043 bytes)
90. [AMPS] Parasitic suppressors (score: 1): Author: lars.harlin@pocab.se (Lars Harlin); Date: Sun, 31 Aug 1997 07:20:18 +0200; Have followed the discussions abt VHF parasitics on the reflector and other Media. Has anyone tried using ferrit in a suppressor? Maybe core-saturation would be a problem?? Lars / SM3BDZ -- FAQ on WW; /archives//html/Amps/1997-08/msg00251.html (7,096 bytes)
91. [AMPS] Parasitic suppressors (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Sun, 31 Aug 1997 09:53:33 EDT; On Sun, 31 Aug 1997 07:08:12 +0200 lars.harlin@pocab.se (Lars Harlin) writes: The only amps I am aware of were the Heath SB-230 and the Ameritron Al-1200. Not sure if the current production AL-1200 s; /archives//html/Amps/1997-08/msg00254.html (7,551 bytes)
92. [AMPS] Parasitic suppressors (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 31 Aug 97 11:31:40 -0800; In the SB-230, the ferrite bead is only in series with the HV-RFC. It is not in series with the anode's VHF-resonant circuit - i.e., the circuit which supports oscillation. Amen, Carl. With no VHF s; /archives//html/Amps/1997-08/msg00256.html (8,011 bytes)
93. [AMPS] Parasitic suppressors (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Sun, 31 Aug 1997 16:12:57 EDT; There were 2 bead placements used by Heath. The QST review mentioned the Heath change bulletin to the wiring "to eliminate a parasitic problem" on 10M. The SB-230 manual I have shows, in the pictoria; /archives//html/Amps/1997-08/msg00259.html (9,107 bytes)
94. [AMPS] parasitic suppressors (score: 1): Author: k1ta@earthlink.net (Bob Marston); Date: Thu, 02 Jan 1997 23:06:37 -0800; Dampening ring is a subject that is given extensive treatment in Sophmore year EE circuit analysis courses. It makes up a good part of transient state analysis. Bob K1TA -- FAQ on WWW: http://www.con; /archives//html/Amps/1997-01/msg00002.html (7,039 bytes)
95. [AMPS] parasitic suppressors (score: 1): Author: k1ta@earthlink.net (Bob Marston); Date: Thu, 02 Jan 1997 23:36:34 -0800; Huh? Are you saying that if there is a legitimate reason to question a statement that we should suspend our skepticism and accept it at face value because it was made on the letterhead of a major tub; /archives//html/Amps/1997-01/msg00003.html (7,865 bytes)
96. [Amps] Parasitic suppressors (score: 1): Author: robert briggs <vk3zl@bigpond.com>; Date: Mon, 11 Sep 2006 06:58:47 +1000; To all who mailed me re P/S, my computer dumped all my mail before I got to read it this morning.Can't retrieve it.would appreciate it if you can re send. Tnx....Bob VK3ZL.. _________________________; /archives//html/Amps/2006-09/msg00177.html (6,129 bytes)

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