OLD BFO

[aft_72005]

Hello
This is a BFO circuit from an old German magazine.
Does anyone have the schematic? Or does anyone know the name of the magazine and the year it was published? It seems to be Elector magazine.

[Qiaozhi]

Unless someone has a copy of the magazine I doubt you will find this freely available.
It appears to be called "Digitaler BFO-Detektor" from a 1987 Elektor magazine.
Their website has a full archive of all their past magazine, but you need to be a subscriber to Elektor magazine to get access.

[aft_72005]

Unless someone has a copy of the magazine I doubt you will find this freely available.
It appears to be called "Digitaler BFO-Detektor" from a 1987 Elektor magazine.
Their website has a full archive of all their past magazine, but you need to be a subscriber to Elektor magazine to get access.

Hello Qiaozhi
Thank you for your attention. I have the files of the Elektor magazine in my home archive. I will look for it with your guidance.

[moodz]

It might be on about p183 ..of Andreas Gatowski, Schatzsuche mit Metalldetektoren – Technik, Selbstbau, Geländeeinsatz, Elektor-Verlag, 1990 (reprinted 1993, ISBN 3-921608-81-3)

[Qiaozhi]

It might be on about p183 ..of Andreas Gatowski, Schatzsuche mit Metalldetektoren – Technik, Selbstbau, Geländeeinsatz, Elektor-Verlag, 1990 (reprinted 1993, ISBN 3-921608-81-3)

I have a copy of that book. It's an Elektor publication.
Yes, you're correct. The images that aft_72005 posted are exactly the same as the ones from the book. The schematic is on page 184.

[GeoMax]

Hi aft_72005,

if you have the archive from KT315, check out the folder "Andreas Gatowski_Schatzsuche mit Metalldetektoren_1990" there is a complete scan of the book. Below is the BFO project.

[aft_72005]

Hi aft_72005,

if you have the archive from KT315, check out the folder "Andreas Gatowski_Schatzsuche mit Metalldetektoren_1990" there is a complete scan of the book.

Hi Geomax

Thank you .