Restoration-mods. old pistols

[Dell Winders]

Anyway, I asked you about the oscope because if done properly, you are able to determine the different frequencies.

When turned on the oscilloscope would show a straight line across the screen.

The antenna was directional. When the antenna was rotated and aligned with the target, the audio would buzz, the meter would deflect, and the line across the oscilloscope screen would change from straight to jagged.

Dell

[Dell Winders]

Ummm, Dell....
These photos look like the Vernell VR-800 and the Dell VR-800.
Hmmmm... aren't the frequency discrimination electronics inside these units the same as the electronics that you used to find coins hidden in the sand for Randi?

Aren't they the same kind of electronics that you used at the beach when you said "conditions deteriorated", and then later claimed that Randi lied about the test results, and you claimed you really did find the hidden coins that Randi says you failed at?


Best wishes,
J_P

Absolutely not! Those units never existed at that time. That's Carl, and Randi's lie, for which they have never apologized for. Dell

[J_Player]

Absolutely not! Those units never existed at that time. That's Carl, and Randi's lie, for which they have never apologized for. Dell

Oh.
I thought the basic 555 timer/oscillator circuits used in the VR-800 existed a few years before they were released as production circuits for consumers. It seems likely you would have used the same circuits during the Randi tests. But I guess I was wrong, and you used a different kind of circuit during those tests in the sand.

So what kind of circuits did you use at the time?

Best wishes.
J_P

[Theseus]

When turned on the oscilloscope would show a straight line across the screen.

The antenna was directional. When the antenna was rotated and aligned with the target, the audio would buzz, the meter would deflect, and the line across the oscilloscope screen would change from straight to jagged.

Dell

So, NO properties of discrimination. Hardly the same thing that a dowsing rod responds to, so saying that you electronically metered the same thing that the dowsing rods indicate is a total falsehood. Not surprising!

[Dell Winders]

W.I.S.

[Theseus]

W.I.S.

w.b.w.t.t.w.i.d.s.t.a.

[Qiaozhi]

W.I.S.

w.b.w.t.t.w.i.d.s.t.a.

"W.D.W.C.B.M.T.W."

[Esteban]

In process. Old housings are painted. Some changes made.

[WM6]

Hi Esteban, you violate dr. Best copyright.

[Astrodetect]

Esteban I wanted to ask you what is the difference between off resonance and BFO?
Thanks

[Qiaozhi]

Esteban I wanted to ask you what is the difference between off resonance and BFO?
Thanks

Hi Astrodetect,

BFO and Off-resonance detectors are closely related, as they both rely on a metal target causing the TX oscillator to shift in frequency. In the BFO the TX signal is mixed with the output from a second internal oscillator (known as the local oscillator) to produce a beat frequency in the audio range. When the TX frequency changes, the audo note also changes. However, in the Off-resonance detector, the TX output is fed into a tuned circuit that is tuned off-resonance. The output of this circuit gives an amplitude change which can be used to trigger an audio output or a meter. So the only "audible" difference is that the BFO has a constant threshold tone that changes in frequency, whereas the Off-resonance detector can be silent search and only beeps when a certain threshold is reached. They both have about the same sensitivity to metal targets.

[Astrodetect]

Thanks Qiaozhi for your explanation. Does anybody have a complete schematic for a stable off resonance detector here?
Thanks again

[Qiaozhi]

Thanks Qiaozhi for your explanation. Does anybody have a complete schematic for a stable off resonance detector here?
Thanks again

Here's a good place to start -> http://www.geotech1.com/pages/metdet...rakes0_150.pdf

[detectoman]

these vlf circuit of rakes, whit ic lm1458, i use for succes two box is not critic and very stable, put 150 turns wire may be cal. 28 or 29, or other, too put one simple oscilator one transistor, how tx put here large capacitor tubular old, very basic, 150 turns and voila

[Esteban]

Circuits inside.