View Full Version : Very low frequency circuit very good
shahrayar
12-09-2019, 12:32 PM
:):)
Very low frequency circuit very good
Very sensitive to static electricity and electromagnetic fields
Lightning strikes may harm him
It has an insulation feature, but I don't know how
Possible help from engineers, such as developing the antenna
https://4.top4top.net/p_1438qj6261.jpg
shahrayar
12-10-2019, 07:07 PM
The device is completely stable
The TV senses from 1/2 meter
https://4.top4top.net/p_1439pnwh31.jpg
https://4.top4top.net/s_1439pnwh31.jpg (https://4.top4top.net/p_1439pnwh31.jpg)
shahrayar
12-11-2019, 01:39 PM
very sensitive
I recommend making them, as the hand senses over 20 cm, the computer senses over 5 meters and many advantages
shahrayar
12-12-2019, 08:59 AM
I shrunk the antenna so that the amplifier will not malfunction
By extending the antenna, it picks up the TV signal from 3 m
https://www.youtube.com/watch?v=kiaZ9xE0KEU
humhum
12-14-2019, 09:18 PM
This circuit is very high impedance Preamp, this schema sharing one Friend from this forum.
FrancoItaly
12-15-2019, 03:33 PM
This circuit is very high impedance Preamp, this schema sharing one Friend from this forum.
You must use CA3130 (very high impedance), 741 operational has a very low input impedance.
abdou2014
12-15-2019, 07:32 PM
ZAHORI WORK FINE WITH CA3130 :)
abdou2014
12-15-2019, 07:38 PM
I added a 50hz notch filter :D
abdou2014
12-15-2019, 10:15 PM
:):)
Very low frequency circuit very good
Very sensitive to static electricity and electromagnetic fields
Lightning strikes may harm him
It has an insulation feature, but I don't know how
Possible help from engineers, such as developing the antenna
https://4.top4top.net/p_1438qj6261.jpg
it's active antenna for sound card VLF reception , it's not an LRL
https://www.qsl.net/dl4yhf/speclab/vlf_rcvr.htm
shahrayar
12-16-2019, 03:46 PM
it's active antenna for sound card VLF reception , it's not an LRL
https://www.qsl.net/dl4yhf/speclab/vlf_rcvr.htm
Is it not suitable for detecting electromagnetic fields of metals?
abdou2014
12-16-2019, 05:18 PM
Maybe with some modification, it will be able to detect a big treasure at some meters
reza vir
12-25-2019, 01:31 PM
Is it not suitable for detecting electromagnetic fields of metals?
No this is vlf filter
It can be used at the inputs of some other circuits
humhum
02-10-2020, 06:33 PM
Can be so like ..... :razz:
This is part from all system .
Even better:
https://i59.servimg.com/u/f59/19/61/60/05/remote10.jpg
abdou2014
02-11-2020, 03:55 PM
Can be so like ..... :razz:
This is part from all system .
GOOD CIRCUIT WHAT'S VLF RECEIVER , CAN YOU SHARE THE VALUES ?
humhum
02-12-2020, 08:12 PM
Even better:
https://i59.servimg.com/u/f59/19/61/60/05/remote10.jpg
:) But here Laser wave is in wrong um (micrometer) .
:)
But here Laser wave is in wrong um (micrometer) .
It is about thermal IR (long wave infrared) laser, in this application ranging
from 6μm to 14 μm wavelength. This region is molecular vibration wavelength.
https://api.intechopen.com/media/chapter/64432/media/F3.png
humhum
02-14-2020, 08:18 PM
It is about thermal IR (long wave infrared) laser, in this application ranging
from 6μm to 14 μm wavelength. This region is molecular vibration wavelength.
https://api.intechopen.com/media/chapter/64432/media/F3.png
Now is Okay ,Dear WM6
Mojtabab88gh
03-18-2020, 10:37 AM
Hi friend's
I see a long range detector , use fm radio wave for detecting metal in depth , and builder saying can detect only old objects in depth .
Transmission using fm radio section , and receiver detecting maybe reflection or phase different and alarmed .
Is that possible ?
Any body have idea?
IranGanj
04-17-2020, 03:15 PM
you mean some thing like Raven from treasureNow?
https://www.geotech1.com/cgi-bin/pages/common/index.pl?page=lrl&file=reports/raven/index.dat
vBulletin® v3.8.11, Copyright ©2000-2024, vBulletin Solutions Inc.