AV multiband VLF receiver

[WM6]

Originally Posted by fmnotes

C1. EXIST DOESN'T 200UF CERAMIC CAPACITOR, OR DOES EXIST?

200uF exist in receiver schematic (not in transmitter). Not ceramic but electrolyte. Look at my previous answer again.

[fmnotes]

Originally Posted by WM6

200uF exist in receiver schematic (not in transmitter). Not ceramic but electrolyte. Look at my previous answer again.

THANK YOU VERY MUCH FOR THE HELP.
BE WELL.

[WM6]

Originally Posted by fmnotes

THANK YOU VERY MUCH FOR THE HELP.
BE WELL.

Of course use of bipolar C is better (here how to build your own out of two equal unipolar):

http://s3.amazonaws.com/readers/2011...apacitor_1.jpg

[fmnotes]

Originally Posted by WM6

Of course use of bipolar C is better (here how to build your own out of two equal unipolar):

http://s3.amazonaws.com/readers/2011...apacitor_1.jpg

Yes I know him, but in I thank for your time.
A question, you know how much coils of wire does need the aerial ferrite?

[WM6]

Originally Posted by fmnotes

A question, you know how much coils of wire does need the aerial ferrite?

I cannot say, it depend on ferrite rod used.

But you can establish approximate number of turns this way:
Turn up ten turn of wire on your ferrite rod.
Measure inductance of those windings.
Divide 57mH by measured inductance (expressed in mH) and then multiply results by 10.
End-result is your approximate number of turns needed.

[fmnotes]

Originally Posted by WM6

I cannot say, it depend on ferrite rod used.

But you can establish approximate number of turns this way:
Turn up ten turn of wire on your ferrite rod.
Measure inductance of those windings.
Divide 57mH by measured inductance (expressed in mH) and then multiply results by 10.
End-result is your approximate number of turns needed.

Yes I thank, you have right.

[fmnotes]

I CAN USE DIODE OF GERMANIUM 0A95 OR 1N60 ? FOR THE OA91?
THEY IS SAME?

[WM6]

Originally Posted by fmnotes

I CAN USE DIODE OF GERMANIUM 0A95 OR 1N60 ? FOR THE OA91?
THEY IS SAME?

Yes, you can both.

[fmnotes]

Originally Posted by WM6

Yes, you can both.

I thank for your help.
For designing pcb you use circuit wizard pro?

[WM6]

Originally Posted by fmnotes

For designing pcb you use circuit wizard pro?

Yes, a little weak database and auto-router, but otherwise very nice, flexible, multi-purpose and user friendly tool.

[fmnotes]

Originally Posted by WM6

Yes, a little weak database and auto-router, but otherwise very nice, flexible, multi-purpose and user friendly tool.

I work ALTIUM DESIGNER 10. But I be believed that PCB WIZART it is very easy, and I see success in auto-router.
how much money it costs circuit wizard pro?
it can I buy him.
I thank

[WM6]

Originally Posted by fmnotes

I work ALTIUM DESIGNER 10. But I be believed that PCB WIZART it is very easy, and I see success in auto-router.
how much money it costs circuit wizard pro?
it can I buy him.
I thank

I am trying in past practically all other designer existed, but allways return back to Circuit wizard Pro. In some more complex projects I use DipTrace too now. Both are working in Ubuntu under Wine.

I purchase CW Pro from MAPLIN:

http://www.maplin.co.uk/circuit-wiza...software-46480

Regretfully CW is no longer under development.

[fmnotes]

Originally Posted by WM6

I am trying in past practically all other designer existed, but allways return back to Circuit wizard Pro. In some more complex projects I use DipTrace too now. Both are working in Ubuntu under Wine.

I purchase CW Pro from MAPLIN:

http://www.maplin.co.uk/circuit-wiza...software-46480

Regretfully CW is no longer under development.

BE WELL THANK YOU VERY MUCH.

[WM6]

Originally Posted by fmnotes

BE WELL THANK YOU VERY MUCH.

If you decide to buy, look after-buy at producer web side for upgrade:

www.new-wave-concepts.com

[fmnotes]

Originally Posted by WM6

If you decide to buy, look after-buy at producer web side for upgrade:

www.new-wave-concepts.com

YES THANKS

[fmnotes]

FRIEND MY,
WE CAN IMPROVE THIS MANUFACTURE,
THAT IS TO SAY IT BECOMES THE WHO SENSITIVE RECEIVER, ADDING SOME AMPLIFIER?

[WM6]

Originally Posted by fmnotes

FRIEND MY,
WE CAN IMPROVE THIS MANUFACTURE,
THAT IS TO SAY IT BECOMES THE WHO SENSITIVE RECEIVER, ADDING SOME AMPLIFIER?

Sensitivity is not a problem.
You need to find better directivity by mutual placing of both antennas.

[fmnotes]

Originally Posted by WM6

Sensitivity is not a problem.
You need to find better directivity by mutual placing of both antennas.

I THANK.
BUT EXIST SOME DOES WAY HIM TO STRENGTHEN HIS FORCE?

SIMPLE I ASK FROM CURIOUS…

[WM6]

Originally Posted by fmnotes

I THANK.
BUT EXIST SOME DOES WAY HIM TO STRENGTHEN HIS FORCE?

SIMPLE I ASK FROM CURIOUS…

Dear fmnotes,

this is receiver, not transmitter.
Why you need more "force"?
Even for transmitter, you need to hold as small transmitting "force" as possible, otherwise you lost useful reflected signal.

For receiver: more directive antenna mean more amplification and more selectivity at the same time. So you need to work primary with antennas directivity if you need more amplification and not to think about adding linear amplifier. With very directive antenna you can select and amplify your wanted useful signal. With adding amplifier you amplify unwanted signal too (except if you add a lot of filtration).

Of course you can ad amplifier in audio output if you wish, but I cannot see real reason for such addition.

[fmnotes]

Originally Posted by WM6

Dear fmnotes,

this is receiver, not transmitter.
Why you need more "force"?
Even for transmitter, you need to hold as small transmitting "force" as possible, otherwise you lost useful reflected signal.

For receiver: more directive antenna mean more amplification and more selectivity at the same time. So you need to work primary with antennas directivity if you need more amplification and not to think about adding linear amplifier. With very directive antenna you can select and amplify your wanted useful signal. With adding amplifier you amplify unwanted signal too (except if you add a lot of filtration).

Of course you can ad amplifier in audio output if you wish, but I cannot see real reason for such addition.

FRIEND MY
IN I THANK AGAIN,
AND CONGRATULATE YOU FOR THAT YOU ARE SHARED MANUFACTURES AND DRAWINGS.

AND ALSO YOU ARE OPEN IN EACH DISCUSSION.

IN FEW DAYS I WILL FINISH THIS MANUFACTURE AND WILL SEE THE IMPRESSIONS.

AGAIN I THANK.

[fmnotes]

FRIEND YOU CAN SEND TO ME THE FILE FROM THE SOFTWARE THAT YOU DREW THE PCB, FOR BETTER AND WHO CLEAN PRINTING, FOR THE CREATION OF PCB.
I THANK

[fmnotes]

HELLO.
WE CAN IN THIS DRAWING CONNECT Frequency Counter OR OSCILOSCOPE?

IN ORDER TO WE MEASURE THE FREQUENCY OF RECEPTION OF SIGNAL.

IF WE CAN, IN WHO POINT OF PCB THEY IS SUITABLE TO CONNECT HIM?

[gold24h]

this is an interesting idea,i have some questions,which capacitor is selected for elf,such as 30 hertz,also how would you use this setup,are you looking for a drop in signal or an increase in signal,also there should be a way to filter out the 50 or 60 hetz utility signal from powerlines,that would make it a perfect elf receiver,i would like to experament with this but i do not understand how to use it,does treasure increase the signal or decrease it,is magnetic direction inportant also.

[fmnotes]

Originally Posted by gold24h

this is an interesting idea,i have some questions,which capacitor is selected for elf,such as 30 hertz,also how would you use this setup,are you looking for a drop in signal or an increase in signal,also there should be a way to filter out the 50 or 60 hetz utility signal from powerlines,that would make it a perfect elf receiver,i would like to experament with this but i do not understand how to use it,does treasure increase the signal or decrease it,is magnetic direction inportant also.

HELLO.

I WANT TO MEASURE THE FREQUENCY OF RECEPTION [WITH A FREQUENSY COUNTER OR ONE PERMANENT PLACED ON THE DETECTOR PORTABLE OSCILLOGRAPH], BUT BECAUSE NO AND THE FORCE OF SIGNAL (WITH UA METER)
EXISTS SOME IDEA THAT WE CAN HIM MANUFACTURE THIS, AND IT WORKS WELL, AND REGULARLY.
I BELIEVE THAT AS LONG AS WHO NEAR YOU ARE IN THE TREASURE SO MUCH WHO POSSIBLE THEY IS THE FIELD THAT CREATES THE TREASURE.
I WAIT FOR TO SEE THOUGHTS THAT WE CAN UPGRADE HIM.

I THANK

[WM6]

Originally Posted by gold24h

,i would like to experiment with this but i do not understand how to use it

.

As already described TX RX configuration can work on 3 way:
Here presented graphically: