Well it's solar minimum time. So maybe you need a new use for your magnetometer for next few years. (Yes, I've seen that we've had some auroras lately. A...
For whatever it's worth, I had some interesting results with sub-audible freq. ( 6-14 hz.) related to telluric currents which did seem to show up extra ...
I am trying to determine the zero field period from a Speake & Co FGM3 fluxgate sensor, and am looking for some critique of my method. If I am correctly...
Just orient it as closely as possible to east-west, and perfectly horizontal so it won't respond to the Z component. From your Z axis field strength it looks...
Erich: ... You mean orient it transverse to the earth field vector, which in my case is ~17 degrees east of geodetic north. ... Latitude: 47 ... Yes, I...
Greetings, all... My name is David, and I'm new to the group. I had long wanted a magnetometer. A few days ago I bought an RFL 101 on eBay. I've also bought a...
Welcome to the group! I,m possibly the one who wrote about magnetometer and Ufo's, and i encourage you to work in this way like me and my friends. I'm still...
Hi, I´m new in the group. I want to build a Fluxgate Magnetometer. Can you help me to find a drive and sensing circuit? If there a PCB image to, it will be...
check out phil barnes, he has a great cd with full plans, photos, even how it should sound. one thing though his plans require a level of equipment most...
Do you have an address for Phil Barnes? Ralph ... From: "jacob avera" <jacobavera@...> To: <magnetometer@yahoogroups.com> Sent: Saturday, June 03, 2006...
Thank you very much!!! I will try this way ... From: jacob avera To: magnetometer@yahoogroups.com Sent: Saturday, June 03, 2006 2:54 PM Subject: Re:...
googling for "Phil Barnes" magnetometer gave http://members.aol.com/phil770/index.html ... From: Ralph Lane To: magnetometer@yahoogroups.com Sent: Saturday,...
They were originally published in the British magazine Electronics World in the late 1990's. I don't know if they are on the magazine's web site or the URL for...
copied fron dans homemade proton mag page. Phil Barnes has updated Nicholas Wadsworth's magnetometer by using modern integrated circuits and active filter...
I posted two photographs of my vintage RFL-101 magnetometer. The first photo is from the magnetometer's manual. The second photo is an oscilloscope screen...
It will be great if you can post the scematic. thank you very much ... first photo ... oscilloscope ... 4 feet ... The scope ... by RFL ... magnetometer ... I...
I've posted to the files section a 2.4MB PDF of the RFL-101 magnetometer manual. It's 16 pages, file name RFL-101-manual.pdf. In the printed manual, the...
Hi David: A quick look at the schematic and I think: Q101 & Q102 & T1 form the 2.5 kHz oscillator. T1 drives Q103 & T103 which drive the probe pins 1 & 4/5 at...
Greetings, I could sure use some help on this one. I have a fluxgate mag buried in the ground a foot deep, but that is not good enough as temperature ...
Hi Joe: One foot is not enough for temperature stability. I have thought about using a "water bit" to drill a hole many feet deep to stabilize the temperature...
hi - just a few ideas: firstly, manganin is really just another type of resistance wire which heats in response to current, so nothing magical there .... If it...
hi - just a few ideas: firstly, manganin is really just another type of resistance wire which heats in response to current, so nothing magical there .... If it...
several thoughts come to mind: 1) Power the the heater with non-harmonically (to the flux gate) related AC. This can be problematic if the flux gate is a...
If you are using a computer of some sort to record the Mag output you might try having the computer turn off the heater when sampling the mag. Steve ... ...
Dont forget about the heat transported through the connection leads to the sensor. Copper is a very good heat conductor. So the connection cables should be...
We have a similar issue heating entrance windows in CCD dewars. The way I have dealt with it is to take a length of resistance wire of the desired resistance...
Hello one and all, I'm a novice in electronics, even if I wield the welder fairly much and often. This I do to make things for the slotracing I spend my days...
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