AV multiband VLF receiver

[fmnotes]

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]

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

Yes, you can both.

[fmnotes]

Yes, you can both.

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

[WM6]

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]

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]

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-wizard-simulation-software-46480

Regretfully CW is no longer under development.

[fmnotes]

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-wizard-simulation-software-46480

Regretfully CW is no longer under development.

BE WELL THANK YOU VERY MUCH.

[WM6]

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]

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]

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]

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]

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]

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.