Tag Archives for " technical "

1 Dave Johnson – “Time of Day” and electrical interference

FTP Head Engineer Dave Johnson

*Posted with permission of Metal Detector Engineer Dave Johnson*

First Texas Head Engineer Dave Johnson has always done an awesome job “educating” the metal detecting masses.  Thanks again for sharing your knowledge Mr. J.!

Time of day influences the amount and type of electrical interference, not just local sources but also longwave radio communications (mostly military) from thousands of miles away.

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1 White’s Vision / V3 Circuit Board

Here are a few views of the interior of the new White’s Vision /V3  (there’s some kinda name issue with Vision from what I’ve picked up…so it may be known as the Spectra V3 in the future)  All the components and solders look very high quality!  For your viewing pleasure…. (yes…I imagine this would void your warranty!)  Full review of the Spectra V3 coming soon!

visionboard4small1

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1 Detector Stuff Interviews the Engineers of White’s Electronics

whitesI want to thank the fine folks at White’s, and especially Alan Holcombe and Carl Moreland for helping arrange this interview!

www.whiteselectronics.com

Contributors:


John Earle – Long time White’s Engineer and Loop Guru.

Dan Geyer – Dan worked on the TDI and is White’s PI specialist.

John Plautz – Multifrequency design Engineer

Carl Moreland – Engineering Manager (and owner of the awesome detector tech site Geotech!)

Question 1:

What got you interested in engineering metal detectors?

John Earle: Playing around with them, trying to make one from scratch.

Dan Geyer: During the period of the 1950’s and 1960’s my family was seriously involved with placer mining for gold in the Mother Lode area of California. During that time it was obvious that metal detectors designed for finding gold would be of tremendous value to the prospector, however, there was nothing commercially available that worked satisfactory. When I started into electronic engineering the desire to develop suitable detectors for prospecting was of continuing interest. After a many years of working in the electronics field I finally received the opportunity to work with metal detectors here at Whites. And, it has proven to be the most interesting job in my 47 year career!

John Plautz: I met a technician from White’s about 20 years ago that convinced me metal detector design was more challenging than it appears. He was right!

Carl Moreland: When I was a chip designer for Analog Devices I designed circuits in CAD, but got very little hands-on building and “playing” with circuits. So as a creative outlet, I started building detector circuits on the side, which led to my quest for more technical information, which led to the creation of Geotech, which led to my job with White’s.

Question 2:

What do you feel is the “key” to the success of a new model of metal detector?

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