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...
"Since I would be running power next to the data out I suspect there wouldn't be much crosstalk?" OK, I think I follow you. You do not want to put both your...
... no, the foil shields are usually aluminum, but they usually have a bare wire connector running through the same shield that is tinned copper to solder to....
I'm recently retired from the audio business and my shielded cables are all Belden foil type. 8451 is the single pair shielded and the two pair is just like...
I use 2 conductor shielded, one cond. for +5 and the other for signal out. There's no chance of "crosstalk" because one is a steady state DC and the other is...
This is how I anticipated wiring mine also, not running a separate power feed like Daniel. But all I have is intuition to work with until I get some more...
There is another factor I forgot to mention which works for you and against crosstalk, and that is impedance. The output impedance of the sensor is about 400 ...
Bill, If you only need 10 feet, send me your snail mail address off list to efkern@... and I'll mail it to you, no charge. If there's anything else ...
Erich, Thanks for your generous offer, but I think I have found a local source of shielded cable. I was looking for shielded twisted pair which is a rarity,...
Bill, Yes is doesn't have to be twisted. Twisted is to reduce pickup of, or radiation of a signal when both conductors are balanced to ground as in data and...
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