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1. [AMPS] ARCING MORE (score: 1): Author: CATALANO_DENIS_E@hq.navsea.navy.mil (CATALANO_DENIS_E@hq.navsea.navy.mil); Date: Wed, 15 Apr 1998 08:01:07 -0400; Thanks to Pete (N4ZR), Carl (KM1H), Jordan, and Rich (AG6K) for replying to my message. I opened the amp up last night, and found several of the tuning capacitor plates pitted and/or melted. Four of; /archives//html/Amps/1998-04/msg00094.html (9,125 bytes)
2. [AMPS] ARCING MORE (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Wed, 15 Apr 1998 09:15:47 EDT; On Wed, 15 Apr 1998 08:01:07 -0400 CATALANO_DENIS_E@hq.navsea.navy.mil writes: If you decide to file Denis, remove the cap from the amp. Use a fine file, remove all the grunge and carefully round all; /archives//html/Amps/1998-04/msg00097.html (8,922 bytes)
3. [AMPS] ARCING MORE (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 15 Apr 98 10:47:18 -0800; Ur welcome, Denis. My guess is that when a new Tune C is installed, or when new plates are installed, the intermittent arcing problem will not go away. - later cheers Rich... R. L. Measures, 805-386; /archives//html/Amps/1998-04/msg00099.html (8,542 bytes)
4. [AMPS] ARCING MORE (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 15 Apr 1998 23:04:42 +0100; That's probably true. Replacing the plates is probably necessary, but it's only treating a symptom. It isn't treating the root cause. Something, somewhere changed from the way it was before. That's w; /archives//html/Amps/1998-04/msg00102.html (8,608 bytes)
5. [AMPS] ARCING MORE (score: 1): Author: m.j.willis@rl.ac.uk (Mike Willis); Date: Thu, 16 Apr 1998 08:16:39 +0100; It may be. Once the capacitor arced and the plates became deformed the arc persisted. The original cause of the arc was operator error, much of that cause will be treated by the extraction of the cos; /archives//html/Amps/1998-04/msg00103.html (9,052 bytes)
6. [AMPS] ARCING MORE (score: 1): Author: measures@vc.net (Rich Measures); Date: Thu, 16 Apr 98 04:02:59 -0800; perhaps it was one of the causes? Sometimes things are not as simple as they seem. A shorted blocking cap puts hv dc on the tank coil, the other end of which goes to dc ground through a rf choke. Be; /archives//html/Amps/1998-04/msg00104.html (9,769 bytes)
7. [AMPS] ARCING MORE (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Thu, 16 Apr 1998 07:03:42 EDT; Ian, I take it that you didn't read the original post.....The arcing started when he had the bandswitch in the wrong position ( or was it the wrong antenna).... No little evil parasites....just a sim; /archives//html/Amps/1998-04/msg00105.html (9,220 bytes)
8. [AMPS] ARCING MORE (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Thu, 16 Apr 98 10:49:45 -0500; Excuse me if I am dense, but how can operator error produce an arc? If the amp is completely stable and bullet proof to begin with and no components are damaged, how did the arc begin? Sure operator; /archives//html/Amps/1998-04/msg00108.html (9,151 bytes)
9. [AMPS] ARCING MORE (score: 1): Author: w4eto@rmii.com (Richard W. Ehrhorn); Date: Thu, 16 Apr 1998 12:17:07 -0600; Hi Jon & all.. How can operator error cause an arc in an unconditionally stable amp? Easily! If the load impedance presented to the anode(s) is much too high, VERY high rf plate voltage results due t; /archives//html/Amps/1998-04/msg00109.html (11,799 bytes)
10. [AMPS] ARCING MORE (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Thu, 16 Apr 1998 17:04:25 EDT; Possibly OR you didnt bother reading the original post Jon. but how can operator error produce an arc? Wrong antenna is a classic way to a path of destruction. I fail to follow your reasoning...it is; /archives//html/Amps/1998-04/msg00113.html (11,337 bytes)
11. [AMPS] ARCING MORE (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Thu, 16 Apr 98 22:06:52 -0500; Understood. Thanks all for the messages about it. Makes sense. 73, Jon KE9NA -- Jon Ogden KE9NA http://www.qsl.net/ke9na "A life lived in fear is a life half lived." -- FAQ on WWW: http://www.contes; /archives//html/Amps/1998-04/msg00115.html (9,153 bytes)
12. [AMPS] ARCING MORE (score: 1): Author: jono@webspun.com (Jon Ogden); Date: Thu, 16 Apr 98 22:23:49 -0500; Understood now. What I am saying is how do you know the capacitor was the weakest link? Maybe it is, but perhaps it is a secondary cause. I don't know what happened to the amp and just cause the cap; /archives//html/Amps/1998-04/msg00116.html (13,311 bytes)
13. [AMPS] ARCING MORE (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 17 Apr 98 03:23:54 -0800; So why not eliminate the possibility that a vhf parasitic was involved by measuring the resistance of the vhf parasitic resistors? cheers Rich... R. L. Measures, 805-386-3734, AG6K -- FAQ on WWW: ht; /archives//html/Amps/1998-04/msg00119.html (9,791 bytes)
14. [AMPS] ARCING MORE (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 17 Apr 98 03:23:52 -0800; The capacitor has not failed. My guess is that the withstanding potential has been reduced a bit by the fireworks. A high-pot. tester should be used to evaluate the Tune C. Checking two, critical co; /archives//html/Amps/1998-04/msg00120.html (10,172 bytes)
15. [AMPS] ARCING MORE (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Fri, 17 Apr 1998 07:56:36 EDT; Do I know it absolutely? No, but after living with amp repair for years you get a feel for problems. That was implied at the very beginning. Anything is possible but common sense based upon the descr; /archives//html/Amps/1998-04/msg00121.html (13,356 bytes)
16. [AMPS] ARCING MORE (score: 1): Author: MALEXANDER@HEALTHDYNE.com (MALEXANDER@HEALTHDYNE.com); Date: Fri, 17 Apr 1998 08:54:42 -0400; Yes, Carl -- I agree. The #1 rule in tuning up is LOAD IT LOAD IT LOAD IT. Otherwise you can expect the light show. Better to keep it a little bit loaded with a hair of reduced power out, until you c; /archives//html/Amps/1998-04/msg00122.html (13,920 bytes)
17. [AMPS] ARCING MORE (score: 1): Author: w4eto@rmii.com (Richard W. Ehrhorn); Date: Fri, 17 Apr 1998 10:48:36 -0600; Hi again Jon... I agree with Carl 100% on this one. Based on experience I'd guess that there is virtually zero chance that in your case a defective parasitic suppressor either caused, or resulted fro; /archives//html/Amps/1998-04/msg00125.html (14,976 bytes)
18. [AMPS] ARCING MORE (score: 1): Author: km1h@juno.com (km1h @ juno.com); Date: Fri, 17 Apr 1998 16:05:58 EDT; On Fri, 17 Apr 1998 10:48:36 -0600 "Richard W. Ehrhorn" <w4eto@rmii.com> writes: Dick, thanks for your comments. I earlier mentioned to Jon and others privately that a dirty amp is an accident lookin; /archives//html/Amps/1998-04/msg00133.html (10,899 bytes)
19. [AMPS] ARCING MORE (score: 1): Author: measures@vc.net (Rich Measures); Date: Fri, 17 Apr 98 14:28:32 -0800; In my opinion, a vhf suppressor resistor (Rs) can not be damaged by a Tune Capacitor arc. The things that can damage Rs are 10m RTTY broadcasting, and vhf energy. . My guess as to what may have happ; /archives//html/Amps/1998-04/msg00140.html (10,674 bytes)
20. [AMPS] ARCING MORE (score: 1): Author: w4eto@rmii.com (Richard W. Ehrhorn); Date: Fri, 17 Apr 1998 16:04:47 -0600; Hi Carl & everyone... It isn't nearly as bad today, but 20-25 years ago many were the ALPHA 76 series amps in for service that we doused inside and out with Formula 709, then watched the brownish-yel; /archives//html/Amps/1998-04/msg00144.html (10,748 bytes)

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