Hi Carl Moreland and another friends

I am Afshin Torkamanzadeh and study Build an MFD article. it is very interesting.

I have questions :
1-what range of frequencies by the transmitter used for copper - diamond – tin – lead –

diampnd - aluminium- cave-water- bronze Prospecting?

2-what type of wave by the transmitter used (sinus or square)?

3- what type circuit used for receiver which connected to right and left antenna and

Receiver how it works?

3- can you send me receiver circuit diagram ?

Thanks for your cooperation and I am looking forward to hearing from you as

Soon as possible.


Best regards.