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Old 01-26-2020, 10:59 AM   #1
chiefdave
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Default 6V Voltmeter

Does anyone know of a source for a 6v +ground voltmeter? Thanks.
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Old 01-26-2020, 11:01 AM   #2
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Default Re: 6V Voltmeter

Polarity doesn't matter. Just switch leads. Just get a scale you like for 6v.
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Old 01-26-2020, 11:11 AM   #3
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Default Re: 6V Voltmeter

To directly answer the O/P's question, I have looked for several years and have never found one that would be practical for automotive use. Those made for 12 volts will function, but will either not read low enough or will lack sufficient precision in the voltage range needed to be of much use at all. I have purchased an industrial 0-10 volt gauge that I plan to remove the "guts" from and install them in a spare automotive case, but I haven't gotten around to it yet.

I want it to use on my engine test stand that I have set up to run both 6 and 12 volts.
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Old 01-26-2020, 12:41 PM   #4
Jack E/NJ
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Default Re: 6V Voltmeter

I just use the guts out of these small 1v or 2v voltmeters. Then use a series dropping resistor to put the needle near mid-scale on a fully charged battery. Typically, the meters run about 2K ohms. So for a 1 volt meter, you'd need about a 23K resistor for a 6.3v battery to put the needle at mid-scale .5v Jack E/NJ


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Old 01-26-2020, 12:53 PM   #5
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Default Re: 6V Voltmeter

I am wondering if this info. could be used to solve the 6V meter reading problem by using a 12V meter.
https://sciencing.com/reduce-12-volt...t-5972145.html
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Old 01-26-2020, 12:57 PM   #6
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Default Re: 6V Voltmeter

Here's a pretty decent-looking 6v (0-18v) gauge which is JUST barely over 2" diameter. I didn't see a date on this ad. Click the link!


http://www.2040-parts.com/6-volt-vol...eter-i1023991/




And below here is a used VDO model, so these things are out there used. DD



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Old 01-26-2020, 01:24 PM   #7
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Default Re: 6V Voltmeter

Get a cheap volt/ohm meter if you are not planning a permanent mount. It should be capable of reading a range of voltages. As for current, the best tool is a meter using a a clamp on lead. Otherwise, you need a professional meter equipped to handle the load. At our shop we use a rather expensive "Amprobe" tester so we can measure high currents, such as the battery cable to the starter.
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Old 01-26-2020, 01:32 PM   #8
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Default Re: 6V Voltmeter

"V8" - I wonder what the "X 2" means on the VDO gauge?
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Old 01-26-2020, 01:38 PM   #9
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Default Re: 6V Voltmeter

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Originally Posted by tubman View Post
"V8" - I wonder what the "X 2" means on the VDO gauge?

I saw that, and I'm still scratchin' my butt....nary a clue! The key here is that these things were available once upon a time. One place I've found to keep an eye out for this "obscure" kind of stuff is on eBay under the heading of "SCTA" (Southern California Timing Assoc.) All kinds of neat stuff shows-up under that heading. DD
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Old 01-26-2020, 02:56 PM   #10
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Default Re: 6V Voltmeter

x2 for 12 volts ?
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Old 01-26-2020, 09:30 PM   #11
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Default Re: 6V Voltmeter

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x2 for 12 volts ?
Yep, 2x 6 volts = 12 volts.

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Old 01-26-2020, 09:51 PM   #12
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Default Re: 6V Voltmeter

It sounds logical, but doesn't that just make it a 12 volt meter? I can see the X1000 on a tachometer, but I don't see the point of this particular voltmeter. If that were still for sale for a reasonable price, I'd buy it just to see what it is.
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Old 01-27-2020, 03:59 AM   #13
Phil Gillespie
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Default Re: 6V Voltmeter

My take on this is the marking is shown and numbered at times 2. ie 2, 4, 6, etc the non marked being the times 1 between the even numbers.
My understanding.
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Old 01-27-2020, 06:25 AM   #14
Charlie Stephens
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Default Re: 6V Voltmeter

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Originally Posted by chiefdave View Post
Does anyone know of a source for a 6v +ground voltmeter? Thanks.
Everything I have seen is the wrong diameter, too deep or doesn't look like it belongs in a Model A. What is the whole story? Why don't you just use an ammeter? If your current is too high, add a shunt.

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Old 01-27-2020, 08:13 AM   #15
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Default Re: 6V Voltmeter

I found some digital voltmeters on E-Bay for less than five dollars.
Large display dont need bifocals
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Old 01-27-2020, 08:49 AM   #16
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Default Re: 6V Voltmeter

If you're going digital and have a cigar lighter socket, you could always get one of these. (Digital meters in these cars should only be temporary anyway.)
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Old 01-27-2020, 10:32 AM   #17
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Default Re: 6V Voltmeter

http://www.funprojects.com/products/5016-Voltmeter.aspx Maybe something like this or?

Last edited by 5851a; 01-27-2020 at 10:32 AM. Reason: additional info
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Old 01-27-2020, 12:08 PM   #18
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Man, it don't get no better than that! DD


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Old 01-27-2020, 12:39 PM   #19
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Default Re: 6V Voltmeter

A little to "antiquey" looking for my taste, but otherwise exactly right. I wonder if it would be possible to turn that rim off and figure some way to mount it. I bit pricey as well.
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Old 01-27-2020, 02:38 PM   #20
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Default Re: 6V Voltmeter

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A little to "antiquey" looking for my taste, but otherwise exactly right. I wonder if it would be possible to turn that rim off and figure some way to mount it. I bit pricey as well.
Might consider getting with you electronic friend, should be easy to get the voltage corrected from a 12 volt gauge. Then would just need a faceplate for it.
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