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1. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 1 Sep 2000 05:44:25 -0400; At least several dozen over the last 15 years. And you? 73, Tom W8JI w8ji@contesting.com -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: am; /archives//html/Amps/2000-09/msg00006.html (7,901 bytes)
2. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: 2@vc.net (measures); Date: Fri, 1 Sep 2000 08:52:48 -0700; ? ... "several dozen" of which type? ? I lost count. -- Please describe how you remove each type of anode-cooler. What does a ''barnacle'' look like? Is this a common occurrence? Cheers, Tom - Rich.; /archives//html/Amps/2000-09/msg00022.html (8,241 bytes)
3. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 1 Sep 2000 13:31:01 -0400; Barnacles are described in many texts. Copper actually grows barnacles when in a vacuum. This entire topic has been discussed here before. Repeating it with you will do very little good. You seem to; /archives//html/Amps/2000-09/msg00031.html (8,991 bytes)
4. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: 2@vc.net (measures); Date: Fri, 1 Sep 2000 14:15:15 -0700; [chortle] these are long copper filaments that burn away easily. Are 3-500Z anodes made from copper? ? We have heard taurine feculance here before.. I have opened dozens of kaput 3-500Zs from amps t; /archives//html/Amps/2000-09/msg00041.html (9,790 bytes)
5. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 1 Sep 2000 22:47:15 -0400; 3-500's primarily fail from gas or mechanical problems like bad welds. Several tubes out of the last batch of 100 3-500Z's from Varian in Salt Lake City before the power grid facility was closed all; /archives//html/Amps/2000-09/msg00047.html (11,547 bytes)
6. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: 2@vc.net (measures); Date: Fri, 1 Sep 2000 21:30:17 -0700; ? Mr Rauch plays the Ad Hominem card. ? vacuum caps tend to accumulate long whiskers of copper during storage. Whiskers are not barnacles. I have never seen an 8877 grow whiskers. [chortle] As I rec; /archives//html/Amps/2000-09/msg00049.html (13,155 bytes)
7. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 2 Sep 2000 05:44:08 -0400; Hi Rich, You constant habit of weaving personal attacks into technical discussions ruins any hope of a meaningful conversation. I'd be happy to get into technical details on how anything works, but e; /archives//html/Amps/2000-09/msg00051.html (9,206 bytes)
8. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: 2@vc.net (measures); Date: Sat, 2 Sep 2000 04:35:06 -0700; Pointing to your practice of tossing things off is hardly a personal matter. You do it. I point. So pull the plug before I publish the autopsy photos of tubes that came from an AL-1500. The writing; /archives//html/Amps/2000-09/msg00052.html (10,387 bytes)
9. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: johndb@dbtechnet.com (John den Boer); Date: Sat, 2 Sep 2000 04:55:28 -0700; I would like to thank all of the people who answered my original post specially Richard Measures and Tom Rouch. The information presented was enlightening and informative albeit a bit confusing at ti; /archives//html/Amps/2000-09/msg00053.html (10,431 bytes)
10. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: 2@vc.net (measures); Date: Sat, 2 Sep 2000 05:37:51 -0700; The main rub with RF amplifiers is that what is happening is way more complex than they appear. Murphy was right. I am not a graduate engineer. I had three years of college before I was booted out f; /archives//html/Amps/2000-09/msg00054.html (11,774 bytes)
11. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: w8ik@subich.com (Joe Subich, W8IK); Date: Sat, 2 Sep 2000 09:05:44 -0400; "Measures" pontificates ... I would consider failure to hold off high voltage (regular, repeatable "big bangs" in SSB) a demonstrable problem. Quite simply, a tube problem is the most likely explanat; /archives//html/Amps/2000-09/msg00055.html (8,980 bytes)
12. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 2 Sep 2000 12:23:31 -0400; There isn't actually much room for interpretation. Everything can be confirmed by physics, math and proper measurement. The problem is getting people to understand the problems, because they are com; /archives//html/Amps/2000-09/msg00057.html (12,847 bytes)
13. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: 2@vc.net (measures); Date: Sat, 2 Sep 2000 09:57:40 -0700; True enough. Also, what a person tosses off is important. The issue is glitch surviveability. Three amp diodes can withstand 200a. 10W, 5V zeners can not. Increasing L-supp decreases VHF gain and in; /archives//html/Amps/2000-09/msg00058.html (12,413 bytes)
14. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sat, 02 Sep 2000 14:48:02 -0400; And you toss-off more than anyone else here Rich. The only things you don't toss-off appear to be your own beliefs. Phil -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting; /archives//html/Amps/2000-09/msg00061.html (8,533 bytes)
15. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: 2@vc.net (measures); Date: Sat, 2 Sep 2000 15:16:16 -0700; When I get asked a question that does not contain ad hominems, I usually answer. If I don't know the answer, I say so. Please give an example of something that I tossed off. thanks - Rich..., 805.38; /archives//html/Amps/2000-09/msg00063.html (8,508 bytes)
16. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: phil@vaxxine.com (Phil (VA3UX)); Date: Sat, 02 Sep 2000 19:19:40 -0400; You mean like your countless replies with such 'statements' as "chortle", "zzzzzz", "violin music",.... You're tactic of *answering* (aka dodging) a question with another non-sequitor question. The r; /archives//html/Amps/2000-09/msg00065.html (9,093 bytes)
17. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: kc4slk@csrlink.net (Mike Sawyer); Date: Sat, 2 Sep 2000 20:21:16 -0400; Boy, I'm sure glad we ran those lowdown, dirty rotten CBer's off of here so that we could get down to some serious technical mind-bending 8+)........ Mike(y) W3SLK -- Original Message -- From: measur; /archives//html/Amps/2000-09/msg00066.html (13,491 bytes)
18. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: 2@vc.net (measures); Date: Sat, 2 Sep 2000 18:42:53 -0700; "chortle" indicates that a statement is humourous. "zzzzz" indicates that things are getting humourless/boring. "violin music" goes with kvetching/bellyaching Bzzzt - Rich..., 805.386.3734, www.vcne; /archives//html/Amps/2000-09/msg00067.html (9,110 bytes)
19. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: johndb@dbtechnet.com (John den Boer); Date: Wed, 30 Aug 2000 19:16:25 -0700; I need some advice and insight from the amplifier gurus in this group. I have a Heathkit SB-220 which I purchased two years ago. I upgraded the linear with Harbach's mods (Sorry Rich) as follows: 1.; /archives//html/Amps/2000-08/msg00557.html (9,868 bytes)
20. [AMPS] Problem with SB-220 Bias Diodes (score: 1): Author: 2@vc.net (measures); Date: Wed, 30 Aug 2000 21:54:45 -0700; Because you are not aware of the situation. ? Harbach does not use enough L-supp in his 3-500Z suppressor. This increases VHF gain. The popped bias diodes may have caused by intermittent parasitics.; /archives//html/Amps/2000-08/msg00563.html (10,214 bytes)

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