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1. [Amps] Henry 3K trouble (score: 1): Author: "A.R.S. - W5AMI" <ars.w5ami@gmail.com>; Date: Wed, 1 Nov 2006 05:51:21 -0600; Hello, I have a Henry 3K Classic (8877) which developed a problem a couple days ago. I'm hoping some long time Henry types (or anyone else) might steer me in the right direction. First, there was an; /archives//html/Amps/2006-11/msg00002.html (8,309 bytes)
2. Re: [Amps] Henry 3K trouble (score: 1): Author: "A.R.S. - W5AMI" <ars.w5ami@gmail.com>; Date: Wed, 1 Nov 2006 06:06:31 -0600; Thanks Tim. Mine just says Biasing diode, 10VDC 1.2 amps Semtech SA-5534. Seems there a several revisions out there to the manual on this amp. -- "There is nothing more uncommon than common sense." -; /archives//html/Amps/2006-11/msg00003.html (10,408 bytes)
3. Re: [Amps] Henry 3K trouble (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Wed, 1 Nov 2006 08:17:41 -0500; Brian, That is almost always a short from the negative rail of the HV to ground at the filter capacitor side of the metering circuit. What that will do is place the grid meter in parallel with the p; /archives//html/Amps/2006-11/msg00004.html (8,236 bytes)
4. Re: [Amps] Henry 3K trouble (score: 1): Author: "A.R.S. - W5AMI" <ars.w5ami@gmail.com>; Date: Wed, 1 Nov 2006 07:24:08 -0600; Great suggestion Tom! There is a diode on that leg I do suspect. I'll remove one leg of it and check it out today. Thanks & 73, Brian -- "There is nothing more uncommon than common sense." -- Frank L; /archives//html/Amps/2006-11/msg00005.html (8,856 bytes)
5. Re: [Amps] Henry 3K trouble (score: 1): Author: "Robert B. Bonner" <rbonner@qro.com>; Date: Wed, 1 Nov 2006 07:29:30 -0600; Brian, I don't have a 3K Classic here or a manual for it, however I do have 3006, 3002 and 3004 which look like the same PS. When your B+ took the shot to ground it will instantaneously try to BRING; /archives//html/Amps/2006-11/msg00006.html (10,271 bytes)
6. Re: [Amps] Henry 3K trouble (score: 1): Author: "Robert B. Bonner" <rbonner@qro.com>; Date: Wed, 1 Nov 2006 09:40:06 -0600; OK Brian, Yes well 1/4" should be far enough at under 5KV, but who knows what sort of spikes happen in there. There might be a cold solder joint at the choke that is FURRING UP with ozone and once io; /archives//html/Amps/2006-11/msg00009.html (15,889 bytes)
7. Re: [Amps] Henry 3K trouble (score: 1): Author: "A.R.S. - W5AMI" <ars.w5ami@gmail.com>; Date: Wed, 1 Nov 2006 10:24:13 -0600; Just took D105 and C105 out of the circuit and removed C105 off of D105. D105 is shorted both ways, so I'm going to go ahead and replace it and C105 before I go any further. Maybe this will be the si; /archives//html/Amps/2006-11/msg00010.html (7,421 bytes)
8. Re: [Amps] Henry 3K trouble (score: 1): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Wed, 1 Nov 2006 16:55:57 +0000; This diode is meant to handle the current surge, not be destroyed by it. Many older amps use "1-amp" diodes like the 1N4001-4007 series, which don't have a high enough surge current rating. The repla; /archives//html/Amps/2006-11/msg00011.html (8,452 bytes)
9. Re: [Amps] Henry 3K trouble (score: 1): Author: "Robert B. Bonner" <rbonner@qro.com>; Date: Wed, 1 Nov 2006 18:34:16 +0000; I agree. Bob dd Sent From Mobile Device This diode is meant to handle the current surge, not be destroyed by it. Many older amps use "1-amp" diodes like the 1N4001-4007 series, which don't have a hig; /archives//html/Amps/2006-11/msg00012.html (9,336 bytes)
10. Re: [Amps] Henry 3K trouble (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Tue, 31 Oct 2006 23:15:51 +0000; I can't believe how cheap 25 or 35A bridges are. Use the two ac terminals and you get two diodes in series back to back, with a rating that will laugh at any glitch current. Steve ___________________; /archives//html/Amps/2006-11/msg00018.html (9,103 bytes)
11. Re: [Amps] Henry 3K trouble (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Wed, 1 Nov 2006 18:34:32 -0500; The fault current only goes one direction. The negative rail can only elevate more and more negative if the HV faults. I never protect meters or rails for the other direction because I never turn my; /archives//html/Amps/2006-11/msg00020.html (8,583 bytes)
12. Re: [Amps] Henry 3K trouble (score: 1): Author: "Robert B. Bonner" <rbonner@qro.com>; Date: Wed, 1 Nov 2006 17:53:38 -0600; --Original Message-- From: Robert B. Bonner [mailto:rbonner@qro.com] Sent: Wednesday, November 01, 2006 5:46 PM To: 'Tom W8JI' Subject: RE: [Amps] Henry 3K trouble Yes you are right Tom, I was way to; /archives//html/Amps/2006-11/msg00022.html (8,944 bytes)
13. Re: [Amps] Henry 3K trouble (score: 1): Author: tim jenkins <jenkins@bellsouth.net>; Date: Wed, 1 Nov 2006 6:57:51 -0500; 10v zenor is what mine showes for d1, tim kv4bk _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2006-11/msg00030.html (11,366 bytes)
14. Re: [Amps] Henry 3K trouble (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Wed, 01 Nov 2006 07:47:12 +0000; Yes, two of the diodes don't have a function in this arrangement but I can't see that they do any harm either. I think it's a component where overkill is good and a bridge is a cheap way of getting a; /archives//html/Amps/2006-11/msg00031.html (8,929 bytes)

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