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Re: Ammeter Question
Original poster: "Aaron Aab" <striker754-at-earthlink-dot-net>
I think im just gonna use my clamp on meter. Cant see paying 70 dolalrs for
an amperage reading when i already have 6 clamp on meters around here
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
Sent: Sunday, January 11, 2004 3:44 PM
Subject: Re: Ammeter Question
> Original poster: dhmccauley-at-spacecatlighting-dot-com
> I would strongly recommend against using a digital handheld multimeter
> unless its something that wouldn't mind losing.
> Tesla coil circuits can have the tendency to put nice transients back on
> your input power feed and i wouldn't want to risk
> having a nice multimeter die because of one of them.
> I would rather use a true analog meter, or better yet, a clamp-on meter
> measuring current.
> > > Where can I find an AC ammeter to go inline with my hot power
> > > would like to be able to measure the amps the transformers are
> > >
> > >
> > >
> > Digi-Key sells panel mount analog meters up to 50 amps a/c for $71.80
> > # is 180-1079-ND.
> > If you are running under 1Kva, you can probably use your handheld
> > multimeter, just read the owners manual first, mine are only good up to
> > amps for short time periods. If you are running high powers, you can
> > an amp clamp or a current transformer.
> > I had this problem when I began useing more powerfull supplies.
> > Fortunately, I salvaged a 100:5 current transformer several years ago.
> > never new how to use it, but I found out on the list. These are
> > when new but you can find them as surpluss. The critical part in my
> > circuit is a .2 ohm 5 watt current sense resistor. This allows me to
> > place my digital meter across the secondary, and if the circuit sees
> > amps, my meter only sees 5 amps. I have to multiply the reading by 20,
> > but it works beautifully. I use a gapped E-I core ballast, thie
> > monitor allows me to calibrate the ballast.
> > Look for used panel meters or current transformers at Murphy's in El
> > Cajon, CA, C and H sales in Pasadena, or Gateway electronics, in San
> > Diego, I think they all have websites.
> > Good Luck and Safe Coiling,
> > Thad Howard