I built the EPE fluxgate gradiometer. I'm having problems with my top sensor. It either reads "zero", or it reads exactly the same as the bottom sensor. I...
To All, I replaced the capacitors on the sensor array and now the mag works great. If anyone else has this same problem, it is probably a bad capacitor or bad...
We lost the software for this logger last month when bag contain the disk was forget on the field. the Logger was not useful until the software is load to the...
Hi, I am searching a way to measure precisely strong fields like 0.5 T. Does anyone know how to make this? A proton meter in MHZ range? Or does that not work...
... Pieter, Nuclear Magnetic Resonance (NMR), which is the basis of the so-called proton precession magnetometer is alive and well in the MHz range. ;) There...
Joseph DiVerdi
diverdi@...
Jun 2, 2005 1:55 am
543
Hi ! Am looking for toroidal fluxgate circuits to build....I have currently one going but I need to get the sensitivity up....any info on mounting the toroid...
You might try over at the ulfelf group. There is a fellow over there by the name of Tom Lambert you should ask for concerning toroid fluxgates. He is the...
The light blue line is the low level light signal which should give you an idea as to when things are happening. Times are UTC and location is central Texas,...
Hello I am a physics teacher interested in making a magnetometer to replace the conventional deflection magnetometer(compass type). The range of magnetic...
Has anyone found any type of coaxial connector for the Speake & Co. FGM3 sensor? I am interested in any type of connector, coaxial or not. Currently I have it...
Hi Bill, We distribute the FGM-3 in North America for Speake & Co. My response to your question is, why? Why a co-ax connector? For long runs I use 2...
Hi I use the power conector that you use to the floppy drive, fits perfectly. regards Lars ... From: Erich Kern To: magnetometer@yahoogroups.com Cc: Bill...
I Have been using shielded twisted pair also. I send 12 vdc out to the sensor and have mounted the 5 vdc regulator and tantalum capacitor on a small piece of ...
Actually, I use the same power scheme Richard does, which is the way to go for long runs. In my case, the FGM-3 is 120 ft. from the 12V reg. supply indoors....
Just a comment about regulators. It is good practice to use two caps both on the input and output, one electrolytic or tantalum for high capacity in parallel...
Another issue Bill might find is the sensor locking up at the slightest movement which I and a couple others had. See message #333 concerning this issue. This...
Thanks to all for your informative answers. I realized I should give a little more detail of my project with the FGM-3 in order to put my question in...
Hi Bill Below are some suppliers I order from. I do not remember which one I ordered the wire from from but I have two pair and four pair shielded types. I...
When I posted this message this group was not active. I thought I might get some reply if I post the message again. Hello I am a physics teacher interested...
Hi Bill, Sorry I misunderstood what you meant when you said "co-axial" connector. Literally, a coax connector is one conductor surrounded by a dielectric and...
Erich: What I suppose I meant was a twinaxial connector. I still have yet to find any shielded twisted pair wire in town, but saw some yesterday that wasn't...
Richard: Thanks for the links. I did a quick survey of your sites, but didn't see exactly what I want. I have found that Mouser has several varieties of...
BC, Use the small thin black hard drive connectors. The fatter white connectors fall off the sensor. The small black ones hold on much better and need less...
PS Since you are looking for magnetically 'hot' rocks, I just wanted to let you know that the gradiometer that I built based on the FGM-3 has no problem ...
Richard: Thanks, I am ashamed to say I missed this one. I just got back from the local Radio Shack store and didn't see it on the shelf, but I looked through...
Daniel: Thanks for the guidance. I did find some two conductor alarm cable at the local Home Depot and it was shielded with the foil and the single bare wire....
Daniel: Interesting. I have a copy of the EPE paper and have downloaded all his software, etc. I like the integrated logging capabilities of his system, and...
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