Useful for all

[sisco]

see these :

http://www.treasurelore.com/florida/detector_info.htm

http://www.deeptech-bg.com/Understan...20Detector.htm

[kt315]

thanks. good texts. have you see these?
http://www.jb-ms.com/Baron/gb.htm
http://www.jb-ms.com/Baron/payne.htm

[sisco]

Hi kt315, can tell me about PI timing ?

(best timing for gold ,best timing for silver ,....)

my english not good and for understand one line of english text must use

dictionary for ten time so if can help me for important object (like best timing

, best frequncy , best pulse width,..) I thank you.