Old pinpointer

[Gervm]

One more qwestion. Is it interesting for anybody BFO and other simple sircuits? They are primitive but they work and find...

[Geo]

One more qwestion. Is it interesting for anybody BFO and other simple sircuits? They are primitive but they work and find...

BFO.... i don't think

[Gervm]

And what about OR (off resonans)?

[Geo]

And what about OR (off resonans)?

Hahaha... don't answer .....
Attach here everything you like. Maybe a schematic or article would not good for me and would be perfect for other members .

[Gervm]

I`ve understood.

[lucifer]

Gervm, I also think there are good ideas on old schematics than can be used today.
I can help with translations from Bulgarian and Russian.

[Gervm]

That`s good

[Gervm]

Yesterday I found in old Radio Televisia Electronica simple IB circuit with ferrite TX and RX coils. But interesting another - it is alike at old russian mine detector IMP. Who was author ...???

[lucifer]

Yesterday I found in old Radio Televisia Electronica simple IB circuit with ferrite TX and RX coils. But interesting another - it is alike at old russian mine detector IMP. Who was author ...???

When was the article published in Radio Televisia Electronica ?

[Gervm]

In 1972

[lucifer]

In 1972

yeah, found it. it has unusual search head. its coils are wound on ferrite rods with litz wire.

[Gervm]

The same construction of search head had russian mine detector and one american. I think they looked each other. Circuit of Russian MD is little better than in this magazine. I think it was only simple modernisation...

[Gervm]

It looked so

[Gervm]

May be open new thread abot them?

[lucifer]

May be open new thread abot them?

I will do a quick translation of Bulgarian article and will open a new thread.