Non-metallic detector schematic!

[Fred]

Here you go:

[Fred]

Continues...

[Fred]

Last part , hope you liked it :

[aft_72005]

Hi Fred
Thank you , it is interesting, assume designed for
Plastic or non metallic mine.
Can you upload high resolution circuit?
Or send me it?
Best regards.

[homefire]

Did It Work?

[Max]

Last part , hope you liked it :

Hi,
sure it must work... it's a military equipment of uncle Sam....

The problem is that's old, Vietnam era design... and it's a mine detector... so the question is "how well it performs on real search field"?

And also... you can ask about performance on coin sized stuff... this thing is for low content metal mines but doesn't automatically means it's good e.g. for small stuff like coins, I dubt it is really.

I never see one on the field... but reminds me much the old AN/PSS11... similar schematic symbols etc... of course, pss11 was pure vlf-IB ...this seems quite different and oriented to higher frequency.
Would be interensting having some depth chart for it.

The 1Khz stuff is just for chopper operations so means about nothing... operating frequency must be well higher.
I guess, cause of that, it will suffer much of false signals... due to e.g. small voids in soil or changes in mineralization.

Now... personally I don't think it was such a success... production of them was just fraction of an/pss11.

AN/pss12 is shiebel pulse induction tx/rx md, the one currently used in middle east.

I think the most interesting stuff in these is the new one... AN/PSS14...

hybrid design... MD+GPR

http://www.globalsecurity.org/milita...d/hstamids.htm

Kind regards,
Max

[Fred]

I think frequency is above 200mhz.I will confirm later.
Maybe this device was not well known because to detect non-metallic objects is not so common.
I mean, except in casinos, i don´t want to search for plasctic coins
Of course i also detects metallic objects, but there is probably better ways to do it.It could be used to detects small cavities.For example Carl´s challenge: it could find the void aroud the coins

[Fred]

Frequency is 390Mhz, it´s on page 4-4

Here more about how t use it, and a better schmatic for Aft :

[Fred]

...

[aft_72005]

and a better schmatic for Aft :

Hi Fred
Circuit resolution better now .thank you
Best regards.

[Overtheedge]

This ain't the detector you want

When I was a Combat Engineer 12B3A, each platoon had one of these.

They work, but ... ,

The tone is not pure, but more like hash. Your ear would go deaf to changes (nulling) after about 20-30 minutes. Lotsa falses. Each operator needed a few hours practice during the week prior to critical use.

Its real claim to fame was detecting voids. The principal was changes in the dielectric inside the shallow coil range which wasn't much. I tend to think this was due to the high frequency of operation.

It was developed to counter the wooden box mines so popular in the former Com-Bloc countries.

It worked, but was never a substitute for probing. It probably has a good use for tracing plastic pipes buried shallow. Can't remember the AN/PRS number for our metallic mine detectors, but they worked better and didn't cause near the tone deafness. But the metallic mine detector was almost worthless for wooden box mines cause the only metal was the spring, firing pin, primer and blasting cap. As I recall, only the spring and firing pin were ferrous. The rest was copper alloy based.

Just my opinion. I'll stick to my MXT. Maybe build a PI from this site.

[Fred]

Interesting feedback, thanks!.

[nitroPI]

non metallic detector schematic

Hey Fred:

I´m very excited with your post where you show pages of the non metallic military detector. Some time ago I have buy the same unit in a surplus store and the manual were not available. Please coul you post the pages with the alignment procedures? the schematic are very clear but the alignment is very important in order to increase performance.
Thank´s

Nitro willy

[Fred]

Hey Fred:

I´m very excited with your post where you show pages of the non metallic military detector. Some time ago I have buy the same unit in a surplus store and the manual were not available. Please coul you post the pages with the alignment procedures? the schematic are very clear but the alignment is very important in order to increase performance.
Thank´s

Nitro willy

Hi Willy,
Quality is not very good,hope that helps:if you need better let me know.
Regards,
Fred.

[nitroPI]

Thank You very much Fred,

The images are fine, this will help me so much!!! I´ll report the results when make the measurements

regards,

Nitro willy