MULTIMETER

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MULTIMETER

Post by bennie hall on Fri Jul 12, 2013 10:46 pm

Hi all i have is an old sperry dm-350a cat.II meter and i here all this talk about cat III's and auto ranging but do we need all that for TUBE RADIOS. i ask you is it worth the money.but i do like the auto ranging that might help out with resisters? just thought i would throw it out and see what comes up.Bennie

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Re: MULTIMETER

Post by 75X11 on Fri Jul 12, 2013 11:13 pm

Auto ranging is a useful feature in resistance and voltage measurement. It looks like you have a meter up to most tasks. Some also like a analog meter on the bench. I use a Simpson 269. As you go along, you will see and adapt your test equipment to any needs you may come up against.
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Re: MULTIMETER

Post by bennie hall on Sun Jul 14, 2013 1:20 pm

Hi 75x11 i looked up your meter and it lookes great is it mase in the U.S.A.thanks bennie

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Re: MULTIMETER

Post by Wildcat445 on Sun Jul 14, 2013 1:38 pm

The only purpopse that I find a digital meter of any kind useful for when it comes to old radios, is resistance measurement. I find a good analog meter more convenient for measurements of voltage. I can watch the needle out of one corner of my eye if I need to. The display of digital meters "bounces" too much to get an accurate reading for my taste. I have two RCA VTVM's, and old Simpson VTVM, a Heathkit VTVM and also a Fluke digital. I use them all for one reason or another. I also have a cheap pocket meter for the little emergencies of life. Like someone else mentioned, you will adapt equipment for your personal taste and style. If you can find a GOOD VTVM, you will really like it for working on old radios. It does not load the circuit like other meters will. The problem with a VTVM is the word "GOOD." Most are antiques by now and may require "tweaking" to get to work correctly.

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Re: MULTIMETER

Post by 75X11 on Sun Jul 14, 2013 2:03 pm

Yes, they were. That model isn't made any more but here is what they offer now.

http://simpsonelectric.com/products/test-equipment/vom-multimeters
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Re: MULTIMETER

Post by Wildcat445 on Sun Jul 14, 2013 2:24 pm

I have a Simpson VOM and a Triplett VOM from the 1950's and they still work okay. But they are not nearly as versatile and useful for radio work as a VTVM. An analog VOM is still better for radio work than a digital, IMHO. I find it difficult to believe that there is a market for an analog VOM at all nowadays. If they could incorporate it into a cell phone.......

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Re: MULTIMETER

Post by MinnesotaHam on Wed Jul 17, 2013 7:03 pm

Cat III required if you work on the house wiring or fuse / circuit breaker panel.
We can debate which of Cat I or Cat II sufficient for antique radio work.
I don't work on primary side of radio power transformer with anything less then Cat III.
I also won't work on outlets or circuit breaker box with less then Cat III. Helps ensure I'm not accidentally holding a hand grenade.

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Re: MULTIMETER

Post by bennie hall on Wed Jul 17, 2013 7:48 pm

Hi minnesotaham i know what you mean beaning an old Marine because my old Sargent said ALL WE HAVE TO FEAR IS THE IN CUMMING. bennie

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Re: MULTIMETER

Post by 75X11 on Wed Jul 17, 2013 8:16 pm

This thread got me to thinking about the test equipment I've used over the years. The last time I used a vtvm was when I did my advanced individual training at Ft. Sill in 1974. Ever since then. it's place had been taken by oscilliscopes, from the OS-8 to dual trace tek's to digital cursor tek's. I recently bought a pretty decent dual trace scope for the bench.
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