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1. Ammeters (score: 1): Author: "Harlan Polk" <happolk@cox.net>; Date: Sun, 18 Apr 2004 21:11:22 -0700; There is legitimate concern about bringing the entire ampere load into the cockpit so it may pass through an internal shunt ammeter or pass by an induction sensing ammeter. An ammeter is a voltage m; /html/healeys/2004-04/msg00573.html (7,719 bytes)
2. Re: Ammeters (score: 1): Author: BillHUCK@aol.com; Date: Mon, 19 Apr 2004 10:18:58 EDT; I have a problem with the concept of automotive ammeters. Should anything go wrong with the shunt, all power shuts off. Is that shunt not just one more link to possible failure? Bill Huck; /html/healeys/2004-04/msg00580.html (7,224 bytes)
3. Re: Ammeters (score: 1): Author: Alan F Cross <alanx@proaxis.demon.co.uk>; Date: Mon, 19 Apr 2004 18:01:49 +0100; Been watching this thread with some interest. I too have thought about adding an ammeter, but don't want to cut into the loom or route the entire current supply through a small meter with shunt. But; /html/healeys/2004-04/msg00584.html (8,951 bytes)
4. Re: Ammeters (score: 1): Author: NPaul72464@aol.com; Date: Mon, 19 Apr 2004 13:14:33 EDT; I put a Smiths ammeter in but left the original wire in place. So it's easy to just put it back as original. Ned Paulsen 1960 BN7; /html/healeys/2004-04/msg00585.html (7,377 bytes)
5. Re: Ammeters (score: 1): Author: BillHUCK@aol.com; Date: Mon, 19 Apr 2004 13:24:04 EDT; Alan, so I am not alone in my distrust of a full-time ammeter. It is obvious that an ammeter could offer useful diagnostic info. For example; in determining problems with the starter system. However; /html/healeys/2004-04/msg00586.html (7,554 bytes)
6. Re: Ammeters (score: 1): Author: Alan F Cross <alanx@proaxis.demon.co.uk>; Date: Mon, 19 Apr 2004 18:33:05 +0100; Ed, What I am suggesting is: NO shunt! Just use the inevitable voltage drop of the existing wire, and amplify it if necessary. This means you break nothing, and suffer no further drop through a shunt; /html/healeys/2004-04/msg00587.html (8,145 bytes)
7. Re: Ammeters (score: 1): Author: John Miller <healeys@n4vu.com>; Date: Mon, 19 Apr 2004 14:35:27 -0400; Actually, that *is* a shunt. (You've just invented the amplified ammeter. :-) -- John Miller Most seminars have a happy ending. Everyone's glad when they're over.; /html/healeys/2004-04/msg00589.html (7,721 bytes)
8. RE: Ammeters (score: 1): Author: "Alex" <alexmm@adelphia.net>; Date: Mon, 19 Apr 2004 14:48:00 -0400; Haven't seen the "Just Brits" schematic yet (the link as given doesn't work for me), but my ammeter circuit (using an Allegro Semiconductor Hall-effect sensor chip) also requires an outboard amplifie; /html/healeys/2004-04/msg00591.html (9,146 bytes)
9. RE: Ammeters (score: 1): Author: "Harlan Polk" <happolk@cox.net>; Date: Mon, 19 Apr 2004 11:57:40 -0700; The ammeter shunts I pointed to are used on single engine aircraft in accordance with Federal Airworthiness Regulations. I expect they are reliable enough. All ammeters have shunts, either internal; /html/healeys/2004-04/msg00592.html (8,079 bytes)
10. Ammeters (score: 1): Author: James Wilson <snaggle2th_gb@yahoo.com>; Date: Mon, 19 Apr 2004 14:20:11 -0700 (PDT); The problem is that you can't always foretell when you'll need the information. Prevention rather than cure is the idea. Last year I was on a drive and had to return late one Sunday for work the nex; /html/healeys/2004-04/msg00599.html (7,938 bytes)
11. Re: Ammeters (score: 1): Author: "Bill Lawrence" <ynotink@qwest.net>; Date: Mon, 19 Apr 2004 18:19:14 -0700; I had that happen to my son's TR-6 once. Ammeter burned out and everything went dead. It was very frustrating, I had to jump the gauge until I found a replacement. An alternative might be to find a g; /html/healeys/2004-04/msg00605.html (7,950 bytes)
12. Re: Ammeters (score: 1): Author: "Bill Lawrence" <ynotink@qwest.net>; Date: Tue, 20 Apr 2004 21:20:38 -0700; Not so, they can also be used for DC depending on what they are attached to. Same principle as the induction loop on an electronic tach, which runs on DC. They use the inductance produced by an elect; /html/healeys/2004-04/msg00642.html (7,916 bytes)
13. Re: Ammeters (score: 1): Author: Dave & Marlene <rusd@velocitus.net>; Date: Tue, 20 Apr 2004 22:25:17 -0600; http://www.allaboutcircuits.com/vol_1/chpt_8/5.html; /html/healeys/2004-04/msg00644.html (8,064 bytes)
14. Re: Ammeters (score: 1): Author: "Bill Lawrence" <ynotink@qwest.net>; Date: Tue, 20 Apr 2004 22:57:59 -0700; /html/healeys/2004-04/msg00647.html (8,062 bytes)
15. Re: Ammeters (score: 1): Author: Alan F Cross <alanx@proaxis.demon.co.uk>; Date: Wed, 21 Apr 2004 09:41:59 +0100; I think the induction loop on a tach is relying on the pulses, which look to a 'transformer' like AC. No pulses, no deflection. As said elsewhere, modern clamp-ons use Hall Effect. -- Alan F Cross; /html/healeys/2004-04/msg00650.html (8,140 bytes)

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