Can I find magnetic anomalies (and treasures) with this?

[Lake]

Schematics and idea is very simple.

Does magnetic field effect to oscillator frequency? How small changes in earth's magnetic field can be detected? nT?



Time Shifting Detector

[Lake]

Re: Can I find magnetic anomalies (and treasures) with this?

Found some information relating to quartz crystals:

http://www.oscilent.com/esupport/TechSupport/ReviewPapers/IntroQuartz/vigmagnt.htm

http://www.ieee-uffc.org/freqcontrol/quartz/vig/vigrad.htm

I guess I have to build this thing..