Proton Magnetometer

[Baterista]

Hi Baterista.
You must be very carefull with the calculation of C4 @ C5 because the input inductance is the inductance of T1 parallel with the inductance of L1 @L2. The best way is to give a signal via a loop at 965Hz and to try to tune it. For my City the frequency is 1950Hz.

Regards

Thanks Geo for the information, the capacitors also has an inductance, in his opinion they can be ignored?

[Geo]

Hi WM6, tanks.

I'm not managing to post a RAR file, with the original magazine Practical Electronics October 1970, any idea why?


[ATTACH]25296[/ATTACH]

Can you send it via email or you have the same problem????

[Geo]

As I said above
All tips from the Huggard regarding the project have been obtained, they are:

Checking the D.C.;
Meter and field check.
What about the "tuning", it is suggested to go on the field and experiment with several
capacitors to get the best tune with the frequency of precession in the place.
I do not know if the Huggard had the information that we have today relative to
frequency of precession, so that it now is possible to make the process "tuning" in the lab.
Here in my area we are under the effect of SAA (South Atlantic Anomaly) or SAMA (South Atlantic Magnetic Anomaly)

[ATTACH]25297[/ATTACH]

the frequency, using the model IGRF11 is 22.648.6 nT.


42.57638811 x 22.648,6 = 964,2955837 herz.


Using the capacitors C4, C5 and C9 suitable for resonant circuit producing the
same frequency precession, the magnetometer, will be tuned and finalized.

Baterista can you give the adress so to download the magnetic field map

[Geo]

Hi Baterista.
You must be very carefull with the calculation of C4 @ C5 because the input inductance is the inductance of T1 parallel with the inductance of L1 @L2. The best way is to give a signal via a loop at 965Hz and to try to tune it. For my City the frequency is 1950Hz.

Regards

[Baterista]

As I said above
All tips from the Huggard regarding the project have been obtained, they are:

Checking the D.C.;
Meter and field check.
What about the "tuning", it is suggested to go on the field and experiment with several
capacitors to get the best tune with the frequency of precession in the place.
I do not know if the Huggard had the information that we have today relative to
frequency of precession, so that it now is possible to make the process "tuning" in the lab.
Here in my area we are under the effect of SAA (South Atlantic Anomaly) or SAMA (South Atlantic Magnetic Anomaly)



the frequency, using the model IGRF11 is 22.648.6 nT.


42.57638811 x 22.648,6 = 964,2955837 herz.


Using the capacitors C4, C5 and C9 suitable for resonant circuit producing the
same frequency precession, the magnetometer, will be tuned and finalized.

[Baterista]

Geo, wish you full recovery soon.

Great work Baterista, congratulations.

Hi WM6, tanks.

I'm not managing to post a RAR file, with the original magazine Practical Electronics October 1970, any idea why?

[Baterista]

Hi Baterista.
Very good work!!! congratulation.
Did you try it??? What about the results???

About my project i did not try out to field because i had some problems with my health. Maybe next month.

Regards

Hello Geo, thanks.
Curiously my biggest problem now is precisely finding a new place of testing, since the place I wore
was "taken" by public works and became contaminated, I could use elsewhere, a large public park,
but was"taken" by drug addicts and traffickers, so I'll have to find a place outside the city.
I'm still researching. But as I got all the results indicated by the author, I am sure everything is ok.

[Geo]

Yes, i constructed the Huggard's magnetometer with some modifications but i did not tried it at field. In lab there are a lot of irons so don't work good and some times it has self-oscillations. I want to fine adjust it and later to replace the main amplifier with a modern one low noise.

Also i have construct two FGM-3 magnetometers but i don't like them.

[WM6]

I broke a rib. Calculates at end of the month to'm fine

Uh rib, very unpleasant for everydays activity, but luckily fully recoverable.

Did you construct proton magnetometer or some other type?

[Geo]

Geo, wish you full recovery soon.

Great work Baterista, congratulations.

Hi WM6.
Thanks for your wishes.
I broke a rib. Calculates at end of the month to'm fine

Regards

[WM6]

Geo, wish you full recovery soon.

Great work Baterista, congratulations.

[Geo]

Hi Baterista.
Very good work!!! congratulation.
Did you try it??? What about the results???

About my project i did not try out to field because i had some problems with my health. Maybe next month.

Regards

[Baterista]

PCB 183 mm x 100 mm, solder side.

[Baterista]

PCB, side of components.

[Baterista]

Hello everyone, after some problems with the supplier, the project was completed.
Using a single-sided PCB, has a new layout, with transistors easy to find
(at least here in my country) and some arrangements. Gradually I will posting more
details.