DC Ammeter Sensitivity Increased?

Jeff Wisnia · 2006-09-27T17:11:52+00:00

Arcane question, and sort of long, but here goes....Last night, young son was in the process of adding foglights to his car and asked me for some wire to extend the harness. I wasn't sure what the current draw would be so I grabbed one of the foglight assemblies and connected it to the Eico 1050 battery charger/DC power supply which has been part of my garage tool clutter for nearly 50 years:When I cranked the voltage up to 13, the bulb lit brightly and the ammeter on the Eico read around 9 amps. That seemed sort of high to me so I asked the kid, "How big a fuse is in the harness which came with those lights?" he looked at it and told me it was a 15 amp fuse. 15 amps for TWO 9 amp bulbs? Obviously something was't right, so I got my Simpson 260 and saw that the current drawn by that bulb was really a bit less than 5 amps.Since SWMBO was out getting some "retail therapy" I had some free time, and taking the Eico into my workshop, I opened it up, disconnected the leads to the ammeter and fed it with my bench supply. That verified again that it was reading almost twice the DC current passing through it.By a couple of "cut and trys" I found that about 4 inches of 18 gage solid copper wire shunting the meter made it read correctly enough for "gummint work", so I soldered that wire in and closed the Eico back up.I believe the ammmeter is what I used to know as a "moving iron" type, and IIRC the restoring force was supplied by some kind of permanant magnet field, not by a mechanical spring. Am I right about that?I doubt that Eico installed a defective meter when they built the unit around 1965 (The date marked on the meter.) and I'm guessing that the meter's restoring magnet weakened over 50 years, increasing its sensitivity to nearly double.Anyone have any similar experience with those kind of meters, I'd enjoy learning more, just for the shits and grins of it.Thanks guys,Jeff-- Jeffry Wisnia(W1BSV + Brass Rat '57 EE)"Rudeness is the weak man's imitation of strength."

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Homer J Simpson 19 years ago

Damian has made it obvious that you and he are idiots.

Bath School disaster - Bath, Michigan, United States; May 18, 1927 (45 dead,

58 injured) Poe Elementary School Attack - Houston, Texas, United States; September 15, 1959 (6 dead) University of Texas at Austin Tower Massacre - Austin, Texas, United States; August 1, 1966 (15 dead, 31 injured) California State University, Fullerton Library Massacre - Fullerton, California, United States; July 12, 1976 (7 dead) Stockton Massacre - Stockton, California, United States, 1989 (6 dead, 30 injured) University of Iowa shooting - Iowa City, Iowa, United States; 1991 (5 dead, 1 injured) Heath High School shooting - McCracken County (near Paducah), Kentucky, United States; December 1, 1997 (3 dead, 5 injured) Jonesboro massacre - Craighead County (near Jonesboro), Arkansas, United States; March 24, 1998 (5 dead, 10 injured) Columbine High School massacre - Jefferson County (near Denver and Littleton), Colorado, United States; April 20, 1999 (15 dead, 24 injured) Appalachian School of Law shooting - Grundy, Virginia, United States; January 16, 2002 (3 dead) Red Lion Area Junior High School Murder/Suicide - Red Lion, Pennsylvania, United States; 2003 (2 dead) Platte Canyon High School shooting - Bailey, Colorado, United States; September 27, 2006 (2 dead)

No sign of Burnaby there. It seems that two fuckheads are no smarter than one.

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Dustbin Ko0k 19 years ago

All of that bile, and *you* don't know the Student and Teacher. Why did you ask Damian, f*****ad?

Posted via a free Usenet account from http://www.teranews.com

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Homer J Simpson 19 years ago

This was a rhetorical question, as anyone with half a brain could tell. Apparently the two of you combined don't manage to achieve even that minimum standard of intelligence.

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Damian 19 years ago

I see you can tap-dance.

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Homer J Simpson 19 years ago

And yet you are as factless as you are brainless.

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Damian 19 years ago

Corrected to match the contents of this thread.

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John Fields 19 years ago

That\'s not what you\'re jealous of, what you\'re jealous of is that we _can_ and you\'re enraged that you\'re impotent and there\'s nothing you can do about it. What would you have done in our place? Let Saddam Hussein _keep_ amassing a fortune and biding his time so that he _could_ complete the development of weapons and delivery systems which would inundate our friends? Probably, and then you\'d be bitching about "Geez, if only you guys had done it this way..." Fuck you, and if you don\'t like it, tough shit. If you think you know a better way to prosecute the war, then write to the President and tell him about it instead of just uselessly flapping your gums here.

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John Fields 19 years ago

You\'re such an easy mark it\'s pathetic. On the one hand you say that you don\'t hate anyone for any reason, and on the other you say you despise blind, arrogant stupidity. Looking at members of the KKK as an examples of individuals guilty of blind, arrogant stupidity seems to indicate that you despise/hate them. Unless you subscribe to the philosophy where you love the person but you hate the act. Just some more of your stupid fucking bullshit, eh?

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John Fields 19 years ago

Yup, it\'s always something different _after_ the fact, isn\'t it, you phony phuck. BTW, what if there were no rhetorical questions?

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John Fields 19 years ago

Yeah, but out of tune. ;)

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Homer J Simpson 19 years ago

Not at all. When you see the village idiot blow up the police station it's probably worth asking yourself if this was the smartest or dumbest thing he has ever done. I see Bob Woodward has just answered that question.

Let him have Kuwait and keep gasoline at 99 cents per gallon.

Why? He can't or won't read, he couldn't understand it anyway, and he always does what Cheney tells him to do so it's a pointless exercise. Tony Snow isn't the spokesthing for the administration -- Dubya is.

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Homer J Simpson 19 years ago

Oh dear. Suppository go up the wrong hole again?

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Michael A. Terrell 19 years ago

What the hell does taking his high blood pressure medicine have to do with how he treats a troll?

Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

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Homer J Simpson 19 years ago

I know you are the King of the Trolls but why do you care about one of them?

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Jamie 19 years ago

now now John, did we forget our medication this morning? :)

Real Programmers Do things like this. http://webpages.charter.net/jamie_5

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John Fields 19 years ago

Perhaps. From the shit you write, I suspect you swallow them.

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Homer J Simpson 19 years ago

Not me. Is THAT your problem?

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John Fields 19 years ago

--- Then there's something you _can_ do about it? What, LOL?

You can't even keep yourself from looking like a goddam fool, here, where trivial s*it is concerned and yet you think that you're fit to determine how the entire world should be run? Forget it. You're nothing but a low-life piece of s*it and that's all you'll ever be so stop pretending that you're something that doesn't need to be flushed.

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--- So, as long as you can get gas for 99 cents a gallon you're willing to look the other way when he kills and tortures thousands of people for daring to disagree with him, as well as using his own people on which to test his biological weapons and God knows what all else?

You're quite a piece of work Homer.

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--- You don't get to be President of the United States of America if you're illiterate, dumbass, and the only reason he wouldn't be able to understand what you wrote would be because of the stupid, nonsensical s*it you spew.

As far as the rest of it goes, you're just afraid to do it because you know damned well that you've got nothing to say that the administration hasn't heard already and rejected as utter crap. With good reason, BTW.

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--- So what's wrong with that?

You're the spokesturd for Coprofaggots Anonymous and you don't feel uncomfortable with that, do you?

-- John Fields Professional Circuit Designer

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John Fields 19 years ago

--- Not me!

Over the last year or so I had a couple of really scary episodes where my blood pressure went up to something like 220/150 and I wound up in the hospital with some serious drugs needed to bring it down to "normal". Since then we've gotten it down to around 120/60 (a near miracle, ISTM) where it sits most of the time, even when I'm ragging on trash like Homer, but thanks for asking. ;)

-- John Fields Professional Circuit Designer

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