Two ultrasonic articles

[Esteban]

The both circuits are of 1963 and 1964, transistorized.

[Esteban]

Part of the circuit. Regarding rights, can't publish all it!

[Fred]

Originally Posted by Esteban

Part of the circuit. Regarding rights, can't publish all it!

Esteban, what is the % can you publish without infringing rights ? They are from ´63 !
Anyway, did you notice the same effect with this than with the wideband receiver and ferrite receiver?

[Esteban]

Fred

Maybe you're right, maybe not. This page has authorization. You can found here many articles, include the both.

http://www.swtpc.com/mholley/Popular...lectronics.htm

Regards

Esteban

[Esteban]

Here you can found another constructional article. With some modifications can work for capture some "phenomenon".

www.arrl.org/qst/2006/04/hanson.pdf

[Geo]

Esteban, thanks

[Max]

Originally Posted by Esteban

Part of the circuit. Regarding rights, can't publish all it!

Hi,
I think nobody will complain anything about that articles... you're becoming too politically correct !

Following you're new addiction to copyright rights we could also close the forum now... no more schematics... no more cloned devices!

All manifacturers will be happy from now on... no more reverse engineering of their products!

Kind regards,
Max

[Max]

Originally Posted by Esteban

Here you can found another constructional article. With some modifications can work for capture some "phenomenon".

www.arrl.org/qst/2006/04/hanson.pdf

Hi,
I read the document... looks interesting for to make an arcing detector... but how the hell this will pick up some treasure signal ???

I mean, it's a passive ultrasonic receiver.... that mix the signal from the transducer to a fixed one in the 38-40Khz range... thus giving some etherodyne effect... thus a beating at e.g. 1Khz or less you can hear in headphones.

Now... though this could be useful if wanna listen for BATS, how it's supposed to works as an LRL !?

I do not understand ! Still detecting something but without a "reason".

Kind regards,
Max

[Esteban]

Originally Posted by Max

Hi,
I read the document... looks interesting for to make an arcing detector... but how the hell this will pick up some treasure signal ???

I mean, it's a passive ultrasonic receiver.... that mix the signal from the transducer to a fixed one in the 38-40Khz range... thus giving some etherodyne effect... thus a beating at e.g. 1Khz or less you can hear in headphones.

Now... though this could be useful if wanna listen for BATS, how it's supposed to works as an LRL !?

I do not understand ! Still detecting something but without a "reason".

Kind regards,
Max

Max

You can use ideas here, not for to detect the arcing.

Regards

Esteban

[Max]

Originally Posted by Esteban

Max

You can use ideas here, not for to detect the arcing.

Regards

Esteban

Hi,
uhm... I'm trying to figure out what do you mean about that "ideas".

Ok... the circuit/project you posted a link is an ultrasonic receiver, very directive also cause of mechanical contruction.

Then we need an ultrasonic emission , right ???

So, by logic the target MUST emit that ultrasonics waves or be excited to emit ultrasonic waves.

Now... I don't know of any e.g. gold coin emitting ultrasounds... by itself!

So , always by logic only, you're saying that you excite the target , somehow... to e.g. emit or reflect some ultrasonics wave.

Now... always following that logic there are two main streams that could fit your assumption:

1. you excite the target with ultrasonic waves it will reflect back maybe modified in e.g. frequency or similar stuff

2. you excite the target with something that aren't ultrasonic waves... so who knows what ? maybe RF or something else... then you get BACK ultrasonic waves.

So... what do you like ? 1 or 2 ?

Kind regards,
Max

[Qiaozhi]

With my skeptical hat on ... I would suggest (with the ultrasonic circuit tuned close to instability) it would be possible to convince yourself, that you were really detecting a signal from a remote target. When in fact it was really scattering of the transmitted pulse.
Such a device would be less convincing than the pistol detector.

[Fred]

Based on what has been said here, i present i new LRL diagram.I am curious to know how it performs:
The 10k resistor in the lower left must be parapendicular to the target.

[Max]

Originally Posted by Max

Hi,
uhm... I'm trying to figure out what do you mean about that "ideas".

Ok... the circuit/project you posted a link is an ultrasonic receiver, very directive also cause of mechanical contruction.

Then we need an ultrasonic emission , right ???

So, by logic the target MUST emit that ultrasonics waves or be excited to emit ultrasonic waves.

Now... I don't know of any e.g. gold coin emitting ultrasounds... by itself!

So , always by logic only, you're saying that you excite the target , somehow... to e.g. emit or reflect some ultrasonics wave.

Now... always following that logic there are two main streams that could fit your assumption:

1. you excite the target with ultrasonic waves it will reflect back maybe modified in e.g. frequency or similar stuff

2. you excite the target with something that aren't ultrasonic waves... so who knows what ? maybe RF or something else... then you get BACK ultrasonic waves.

So... what do you like ? 1 or 2 ?

Kind regards,
Max

Still I'm awaiting for an answer...

[J_Player]

Originally Posted by Max

Still I'm awaiting for an answer...

Perhaps if you were to add a second ultrasonic transmitter to the circuit board with an intermediate frequency (slightly lower than the primary ultrasonic frequency), you could arrive at a BFO version of ultrasonics. By monitoring the difference signal, maybe you could locate treasure. I heard rumors this works for magnetic coils. why not for ultrasonic transducers?

Best wishes,
J_P

[Astrodetect]

Hello Esteban
When you say with some modifications, what modifications can we make to make it catch the phenomenon?

[Esteban]

Is the same as IR. The ray is used as a bridge, as an antenna, the phenomenon "travel" on it and arrive. There are small chages in frequence. The transmitter is the receiver also because catch the small alteration.

[Max]

Originally Posted by Esteban

Is the same as IR. The ray is used as a bridge, as an antenna, the phenomenon "travel" on it and arrive. There are small chages in frequence. The transmitter is the receiver also because catch the small alteration.

How can be that way ?

The IR led just emits IR light!

Then what ? The signal travels on IR light beam ???

That way it's impossible.

Or do you mean something different ?

Kind regards,
Max

[Carl-NC]

Somewhere I have an email from the final owner of Poptronix giving me permission to post complete articles from any of the old issues, which includes Popular Electronics. So post whatever you want.

- Carl

[Esteban]

Originally Posted by Max

How can be that way ?

The IR led just emits IR light!

Then what ? The signal travels on IR light beam ???

That way it's impossible.

Or do you mean something different ?

Kind regards,
Max

Don't wish repeat a think repeated 100 times!

[Fred]

Originally Posted by Esteban

Don't wish repeat a think repeated 100 times!

I think to remember you said the beam kind of ionized the air who allowed the HV to travel trhu it,right?
After all it´s all about the same idea, the burried "oxided" metal creates a deformation in the electric gradient, as does your IR .
I wonder how you PD reacts to a rod partially burried and sticking out about 50cm out of the ground ?

[Max]

Originally Posted by Fred

I think to remember you said the beam kind of ionized the air who allowed the HV to travel trhu it,right?
After all it´s all about the same idea, the burried "oxided" metal creates a deformation in the electric gradient, as does your IR .
I wonder how you PD reacts to a rod partially burried and sticking out about 50cm out of the ground ?

Hi Fred,
yes... but to ionize free air you need more than an IR led!

I remember too that things Esteban wrote... but then no clue of how the hell the air is so different from here there in Paraguay!

Also... Paraguay climate is hot and humid... then static electricity is very hard to detect in such environment cause of leaks due to the water vapours there....

Uhm... I think the IR led can't do anything apart some science fiction... don't see a way how that stuff could give extended range of detection... for me it's pure speculation.

Kind regards,
Max

[Max]

Originally Posted by Esteban

Don't wish repeat a think repeated 100 times!

You read Carl's post... now can post articles if you want...

But I know... are just about BAT detectors and the like...

Just to have "ideas"...

So... ideas to make a gold-sonar I think!

Kind regards,
Max

[Qiaozhi]

Originally Posted by Fred

I think to remember you said the beam kind of ionized the air who allowed the HV to travel trhu it,right?
After all it´s all about the same idea, the burried "oxided" metal creates a deformation in the electric gradient, as does your IR .
I wonder how you PD reacts to a rod partially burried and sticking out about 50cm out of the ground ?

I think the "idea" beyond this concept is that the IR beam is supposed to act like some sort of probe that establishes a "connection" (or signal line) to the target. Perhaps the PHENOMENON is somehow transported along the beam ... pseudo-scientifically speaking, of course.

[Esteban]

Originally Posted by Qiaozhi

I think the "idea" beyond this concept is that the IR beam is supposed to act like some sort of probe that establishes a "connection" (or signal line) to the target. Perhaps the PHENOMENON is somehow transported along the beam ... pseudo-scientifically speaking, of course.

A beam of IR light –in this case modulated– is an antenna with the advantage free of interference as a metalic antenna. Here exist a tone in receiver. So, you can made with it the job.

The same with ultrasonic.

[Qiaozhi]

Originally Posted by Esteban

A beam of IR light –in this case modulated– is an antenna with the advantage free of interference as a metalic antenna. Here exist a tone in receiver. So, you can made with it the job.

The same with ultrasonic.

This explanation sounds similar to my previous suggestion. I called the beam a "probe", but you've called it an "antenna".