Good morning interesting page metal detectors Germany

[Skippy]

I'm sure the Germans are working on a55-Penetrating radar.

Regarding poor old Henrik, he wasn't impressed:
http://www.findmall.com/read.php?34,...04#msg-2262004

[kt315]

quota of Henrik

Hi all..
Sorry I didn't see this thread before now...
I got a DRS ground Exper th 23 dec.2015 from DRS Germany.
NIGHTMARE will say all.
Never ever do any business with DRS Germany and If you want the full story, please PM.
Do the Ground Exper work ? I can't say because they send a unit with so many defect and things missing
and Email corresponding is this moment stopped, no respond. If I should give the quality of the unit and the setup
some words... Chinese junk.
Only one good thing to say, the US disb. tryed to help early in the deal, to wake up the German office,
they seem to be honest..
Henrik.



Edited 1 time(s). Last edit at 01/09/2016 03:48AM by Henrikras.

[kt315]

I'm sure the Germans are working on a55-Penetrating radar.

Regarding poor old Henrik, he wasn't impressed:
http://www.findmall.com/read.php?34,...04#msg-2262004

do you know how looks the REAL georadar? only Kostin did this project and noboby around.

here a pic of TX part of REAL georadar for you, from Kostin info.

[kt315]

Attempt to explain obscure from the point of view of the radio fan
The shaper of impulses with the current breaker included parallel to loading
The shaper of impulses with use of the generator of Marx
So, from viewing of parameters and characteristics of a georadar we found out that on the antenna of the transmitter it is necessary to give a monopulse (it still call videopulse) tension to some hundreds of volts and duration, depending on the chosen antenna frequency, from nanosecond shares to several nanoseconds. As well as in metaldetectors, only the powerful impulse "punches" the earth. Some nanoseconds are about currents in hundreds of amperes for these. As the frequency of repetition of impulses is rather small (in relation to its duration), this mad power "is smeared" due to huge porosity up to quite usual sizes.
f 600 V and lasting 3-4 nanoseconds. Peak current 10 A, peak power is 6000 BA. Frequency of repetition of impulses of 42 KHZ that gives the average power of the transmitter (for hour of work) about 4 W. Current of consumption of the transmitter from the battery about 300 мА (the general current of consumption of a georadar about 700 ма). In the device lithium - the polymeric accumulator with a capacity of 10 and · hour that allows to work without recharge about 14 hours is used.
Still quite recently production of such transmitters was destiny of few "elite" and represented an uncommon task. However everything flows, the river under the name "time" doesn't plow only lazy, and, by means of the Internet, in any directions and repeatedly... Now can make such device also the simple radio fan if reads the different information which is kindly dumped in the Internet by the same fans and will get somewhere VCh (or the microwave oven) an oscillograph. It is still possible to buy old Soviet C1-104 or even a stroboscope of C7-8, and for small money. If you have no such oscillograph and there is no thirst for soldering, all the rest can be not read. Yes, still the head is desirable...
So, with what it is necessary to begin? It is necessary to begin with reading of several books and works in which the principles of formation of powerful high-voltage impulses are simply and intelligibly stated. I and made, and read them several times. At first when developing "Geotron", then at the beginning of collaborations with the Krasnodar JSC YUG-MD. The list read on a subject it is possible to look at the end of this article. It is easy to be convinced that for the radio fan only schemes with diode shapers - obostritel of an impulse or a kind of generators of Marx can find practical application. All the rest or is difficult, or demands use of different exotic semiconductors or ferrite. They or couldn't be taken, or this too expensive pleasure. In passing reading should look for an oscillograph, and also to clean and put for the future details from not new "motherboards", power units of computers and other modern equipment. Also not п

[kt315]

Principles of receiving powerful high-voltage impulses of tension of small duration
Attempt to explain obscure from the point of view of the radio fan
The shaper of impulses with the current breaker included parallel to loading
The shaper of impulses with use of the generator of Marx
So, from viewing of parameters and characteristics of a georadar we found out that on the antenna of the transmitter it is necessary to give a monopulse (it still call videopulse) tension to some hundreds of volts and duration, depending on the chosen antenna frequency, from nanosecond shares to several nanoseconds. As well as in metaldetectors, only the powerful impulse "punches" the earth. Some nanoseconds are about currents in hundreds of amperes for these. As the frequency of repetition of impulses is rather small (in relation to its duration), this mad power "is smeared" due to huge porosity up to quite usual sizes.
Here concrete example: the Geotron transmitter develops impulses of 600 V and lasting 3-4 nanoseconds. Peak current 10 A, peak power is 6000 BA. Frequency of repetition of impulses of 42 KHZ that gives the average power of the transmitter (for hour of work) about 4 W. Current of consumption of the transmitter from the battery about 300 мА (the general current of consumption of a georadar about 700 ма). In the device lithium - the polymeric accumulator with a capacity of 10 and · hour that allows to work without recharge about 14 hours is used.

[WM6]

BA = W(att)

[kt315]

Volts * Ampers
VA

[kt315]