Falcon MD20

[jmoller99]

This is what the inside looks like. It works well going thru concentrates to see if anything of value might be there or not. Good for poking around tailings dumps as well. Useless for much of anything else.

[bklein]

I just got a demo on one of these this weekend. It has this copper metal ring to I guess tweak the response; so that approaching gold gives a signal and withdrawing from ferrous materials gives one as well.

If this works so well for a pinpointer type thing why not in a traditional detector design?
Is said to be 300Khz. So said are stud detectors. Maybe this originally was one...
I'd like to read more about the theory behind this type design.

[mikebg]

vlf tech.

Mario, the operating frequency is 300kc/s. This is not in VLF band. In the VLF band are frequencies between 3k and 30k where GND signal can be balanced with synchronous demodulation. I think the name "AUTO GND BAL" means that button regulates the speed of SAT (Self Adjusting Threshold).
WA2EVR, is that true?

[mario]

vlf tech.

[mikebg]

I have one and they are only good for checking rocks for gold NOT placer gold deposits. At 300 KC's it is super sensitive to the black sand in the dirt or other minerals where scanning a rock it finds the flake gold effortlessly.
Randy

Randy, I searched WEB for Falcon operators manual, but can not find it. The MD20 has a control "AUTO GND BAL". Can you explain how it is used?

[Seden]

Falcon MD20

I have one and they are only good for checking rocks for gold NOT placer gold deposits. At 300 KC's it is super sensitive to the black sand in the dirt or other minerals where scanning a rock it finds the flake gold effortlessly.


Randy

[kt315]

handheld detector? see it on sale.

http://www.findmall.com/read.php?65,1297218

http://www.falconmetaldetectors.com/id1.html

http://prospectingchannel.com/process-gold-concentrate.html

[mikebg]

Operating frequency 300kHz
Powered by 2 bat x 9V
It can detect an extremely small speck of gold at about ¼ of an inch from the probe.

http://metaldetectorreviews.net/detectors/196-1-falcongoldprobemd20.html

[chemelec]

Anyone have any info or schematics for a "Falcon MD20"?

I'm told it can detect "flakes" of gold at 2 to 3 inches?

Just Curious.