Posts Tagged ‘F70’
Fisher and Teknetics Chief Designer Dave Johnson has written an AWESOME book on gold prospecting with a VLF metal detector! Tons of great information for prospectors and potential prospectors…as well as folks who just want to “learn more” about metal detectors! Special thanks to Dave Johnson and Mike Scott for allowing me to reprint the book in it’s entirety here on www.detectorstuff.com !
VISIT the brand new Teknetics website HERE! http://www.tekneticst2.com/
*reprinted with permission of First Texas Products*
VLF Metal Detector
Dave Johnson, Chief Designer
First Texas Products & Fisher Research Labs
This book explains how to use a VLF induction balance metal detector for gold prospecting. The author has nearly 30 years’ metal detector design engineering experience and has designed machines in every major metal detection technology category.
Fisher was kind enough to send it our way for distribution…if our servers can take the downloads! By the way, overlook the mediocre writer in there named “mark”
*Update* WTN is now posted for download on Fisher Labs Website…get it HERE!
To put it bluntly, the Fisher F70 is THE HEAT! As a proud and happy owner of an F75, I caught myself thinking…”I bet the F70 will be a scaled down F75”. In some ways, I was right. A few less features than the F75, (and I LOVE the F75 trigger!…it should be illegal to build a metal detector without a trigger!) However, Fisher retained the most useful functions and made them very accessible to the user. There’s also a little something extra under the hood… more depth than the F75! Yep, you read that right! In my soil, coil-for-coil, the F70 is slightly deeper than the F75.
Speaking of coil-for-coil, if you already have an F75 you can swap coils back and forth. The new elliptical concentric coil for the F70 is great! Excellent design, construction and balance. However, slap the big F75 11” DD coil on the F70 and hang on! I’m talking SERIOUS depth here! Select the “slow” option in areas that will allow it (lengthens the sampling time on the target…if I understand it correctly) and you will be getting way, way down in the ground! (I picture moles, grubs and earthworms packing their bags and fleeing the radio waves in utter terror!) However, due to the lengthened response time, the odds of masking due to nearby trash are increased…but I love having the option to pick which way I want to hunt, depending upon site conditions.