to wm6 and j-p

[ma330]

Hi ma330,
I believe that a coil antenna is best to receive VLF waves and to transmit VLF waves from a portable transmitter or receiver.
But it is possible to use a telescoping antenna for a VLF receiver.

I found a project online to build a small VLF receiver that can tune VLF signals, based on the TDA4100 IC.
This IC has a mixer, VFO, IF amplifier and demodulator unit in one integrated circuit, so there are not too many other parts to add.
This circuit uses all inexpensive parts. And the article tells some substitute parts you can use if the parts are not available.

I do not recommend to use this method for treasure hunting because I do not think you will find any treasure with it.
This project also requires a knowledge of electronics and receivers because there are many options shown in the project.
I cannot give you advice for the best way to build this circuit, but you can look at the article for tips from the person who designed it.
If you want to receive VLF with a telescopic antenna, then this method is working.

See the full article here: http://www.vlf.it/fritz/pocketrx.html

Best wishes,
J_P

tank you very much dear j-p
Can you show me how to paint waves reflected from the antenna coil and how they?
I mean vlf transmitter antenna coil
tank you

[J_Player]

tank you very much dear j-p
Can you show me how to paint waves reflected from the antenna coil and how they?
I mean vlf transmitter antenna coil
tank you

Hi ma330.
I do not know how to paint waves.
You can learn some things about mapping under the ground here: http://www.sciencedirect.com/science...86779807000478
and here: http://www.epa.gov/esd/cmb/Geophysic...ic_Methods.htm

Best wishes,
J_P

[ma330]

tank you
I need to vlf transmitter with 8038. Orbital average power loop antenna.You can give me the other schematic?
The playing frequency is generated by the 8038 loop antenna?
For Tune not need a capacitor?
Frequency does not change?
Wrap the wire on ferrite antenna is affected?
Please explain to me

[J_Player]

tank you
I need to vlf transmitter with 8038. Orbital average power loop antenna.You can give me the other schematic?
The playing frequency is generated by the 8038 loop antenna?
For Tune not need a capacitor?
Frequency does not change?
Wrap the wire on ferrite antenna is affected?
Please explain to me

Hi ma330,
Here is the only Orbital average power loop antenna schematic I know of.
Explanation:
1. Solder all parts together as shown on schematic.
2. Turn on power switch.
3. Push Battery Test button to see if battery is strong.
4. Adjust frequency at 10K Frequency adjust potentiometer -- 20 Hz to 20 KHz.
5. Adjust power output at 10K power control.
6. See VLF and ULF frequencies broadcast into the air and ground from Orbital average power loop antenna.

Best Wishes,
J_P